FCC ID: A92S251B Tiris Reader System

April 00 Preface Series 2000 Reader System RI-STU-251B Reader S251B Reference Guide 11-06-21-054 April 2000 1 S2510 Reader - Reference Guide Edition One - April 2000 April 00 This is the first edition of this manual, it describes the following equipment:

TIRIS Reader S251B RI-STU-251B Texas Instruments (TI) reserves the right to make changes to its products or services or to discontinue any product or service at any time without notice. TI provides cus-

tomer assistance in various technical areas, but does not have full access to data concerning the use and applications of customer's products. Therefore, TI assumes no liability and is not responsible for customer applications or product or software design or performance relating to systems or applications incor-

porating TI products. In addition, TI assumes no liability and is not responsible for infringement of patents and/or any other intellectual or industrial property rights of third parties, which may result from assistance provided by TI. TI products are not designed, intended, authorized or warranted to be suitable for life support applications or any other life critical applications which could involve poten-

tial risk of death, personal injury or severe property or environmental damage. The TIRIS logo and the word TIRIS are registered trademarks of Texas Instruments Incorporated. Copyright 2000 Texas Instruments Incorporated (TI) This document may be downloaded onto a computer, stored and duplicated as nec-

essary to support the use of the related TI products. Any other type of duplication, circulation or storage on data carriers in any manner not authorized by TI represents a violation of the applicable copyright laws and shall be prosecuted. 2 PREFACE Read This First About This Guide Conventions This manual describes the TIRIS S251B Reader, its goal is to describe the reader, how it works, how to install it and how to use it. Regulatory, safety and warranty notices that must be followed are given in Chapter 5. WARNING:

A WARNING IS USED WHERE CARE MUST BE TAKEN, OR A CERTAIN PROCEDURE MUST BE FOLLOWED IN ORDER TO PREVENT INJURY OR HARM TO YOUR HEALTH. CAUTION:

This indicates information on conditions which must be met, or a procedure which must be followed, which if not heeded could cause permanent damage to the equipment or software. Note:

Indicates conditions which must be met, or procedures which must be followed, to ensure proper functioning of the equipment or software. Information:

Indicates information which makes usage of the equipment or soft-

ware easier If You Need Assistance Application Centers are located in Europe, North and South America, the Far East and Australia to provide direct support. For more information, please contact your nearest TIRIS Sales and Application Center. The contact addresses can be found on our home page:

http://www.tiris.com 3 S2510 Reader - Reference Guide Document Overview April 00 Page Chapter 1: Introduction . 6 General............................................................................................... 7 System Description ............................................................................ 7 Product Description ............................................................................ 7 1.1 1.2 1.3 Chapter 2: Hardware . 9 General............................................................................................. 10 Product Description .......................................................................... 10 Mechanical Information .................................................................... 22 2.1 2.2 2.3 Chapter 3: Synchronization . 23 Introduction....................................................................................... 24 Types of Synchronization ................................................................. 24 3.1 3.2 Chapter 4: Installation . 29 Introduction....................................................................................... 30 4.1 General............................................................................................. 30 4.2 Mechanical Mounting ....................................................................... 30 4.3 Communication ................................................................................ 31 4.4 Synchronization................................................................................ 34 4.5 General Purpose Input/Outputs........................................................ 38 4.6 LED Outputs..................................................................................... 39 4.7 Reset ................................................................................................ 39 4.8 4.9 Antenna ............................................................................................ 40 4.10 RF Power Output Adjustment........................................................... 40 Chapter 5: Warnings, Cautions and Notices . 41 List of Figures Page Figure 1: S251B Reader ................................................................................ 7 Figure 2: S251B Front Panel (with connector covers removed) .................. 10 Figure 3: S251B Connector Locations ......................................................... 11 Figure 4: CTL Setup Switches ..................................................................... 20 Figure 5: RS422/RS485/DAT Switches ....................................................... 21 Figure 6: Synchronization DIP Switches ...................................................... 21 Figure 7: Distance between Antennas (top view)......................................... 28 Figure 8: Switch Settings for RS422 ............................................................ 33 Figure 9: Switch Settings for RS485 ............................................................ 33 Figure 10: Wired & Combined Wireless/Wired Sync. Interface Connection 34 Figure 11: Master/Slave Sync. Interface Connection (without Ack.) ............ 35 Figure 12: Master/Slave Synchronization Interface Connection .................. 36 Figure 13: Carrier Phase Synchronisation Interface Connection ................. 37 Figure 14: Connecting the LED Outputs ...................................................... 39 Figure 15: RESET Push-button Wiring ........................................................ 39 4 April 00 Preface List of Tables Page Table 1: List of Connectors .......................................................................... 11 Table 2: Power Range Settings ................................................................... 12 Table 3: Supply Connector........................................................................... 12 Table 4: Supply Connector - Specifications ................................................. 13 Table 5: General Purpose Inputs/Outputs.................................................... 13 Table 6: General Purpose Inputs/Outputs - Specifications .......................... 14 Table 7: Synchronization Interface............................................................... 14 Table 8: Synchronization Interface - Specifications ..................................... 14 Table 9: Carrier Phase Synchronization Interface ....................................... 15 Table 10: CPS Interface - Specifications ..................................................... 15 Table 11: Open Collector & I/Os .................................................................. 16 Table 12: Open Collector & I/Os - Specifications......................................... 16 Table 13: RS232 SUB-D Connector ............................................................ 17 Table 14: RS232 WECO Connector ............................................................ 17 Table 15: RS422/RS485 Connector............................................................. 18 Table 16: RS422/RS485 Communications Interface - Specifications .......... 18 Table 17: Indicator Outputs.......................................................................... 19 Table 18: Indicator Outputs - Specifications ................................................ 19 Table 19: Antenna........................................................................................ 19 Table 20: Antenna - Specifications .............................................................. 19 Table 21: CTL Setup DIP Switches.............................................................. 20 Table 22: I/O Setting Switches (6 & 7) ......................................................... 20 Table 23: RS422/RS485/DAT Settings DIP Switches.................................. 21 Table 24: Synchronization DIP Switches ..................................................... 21 Table 25: Indicators...................................................................................... 22 Table 26: Mechanical Information ................................................................ 22 Table 27: Distances Between Antennas ...................................................... 28 Table 28: RS232 9-pin Connector................................................................ 31 Table 29: RS232 WECO Connector ............................................................ 32 Table 30: RS422/RS485 Connector............................................................. 33 Table 31: Wired and Combined Wireless/Wired Synchronization................ 34 Table 32: Master/Slave Synchronization Without Acknowledgement .......... 35 Table 33: Triggered Synchronization ........................................................... 35 Table 34: Master/Slave Synchronization With Acknowledgement ............... 36 Table 35: General Purpose Inputs/Outputs.................................................. 38 Table 36: Antenna Specifications................................................................. 40 5 CHAPTER 1 Introduction Chapter 1:

Introduction This introduces you to the S251B Reader, what it is and what it does. Topic Page 1.1 General..........................................................................................................7 1.2 System Description......................................................................................7 1.3 Product Description.....................................................................................7 1.3.1 Interfaces ...............................................................................................8 1.3.2 Communications Protocols ....................................................................8 6 April 00 1.1 General Chapter 1. Introduction This document provides information about the S251B Reader. It describes the reader and how to install it. 1.2 System Description A TIRIS system comprises a reader connected to a control device (usually a host computer) via an RS232, or an RS422/RS485 interface, an antenna and a trans-

ponder. It is used for wireless identification of TIRIS LF transponders. The reader sends a 134.2 kHz power pulse to a transponder, the energy of the gen-

erated magnetic field is stored in the capacitor in the transponder and when the pow-

er pulse has finished the transponder immediately sends its data back to the reader. 1.3 Product Description The Reader is an integral part of a TIRIS system, it provides all of the RF and control functions required to communicate with TIRIS LF transponders. The main task of the Reader is to send a power pulse via the antenna to initialize the transponder, to demodulate the received identification signal and then send the data to a control device. It is also used to send programming data to Read/Write and Mul-

tipage transponders. The Reader is housed in an IP20 Polycarbonate box as shown Figure 1. Figure 1: S251B Reader If connected via an RS232 or an RS422/RS485 interface the computer sends com-

mands to the reader using one of the two protocols used by the system (ASCII or TI-

RIS Bus Protocol), and the reader then communicates via its antenna with any transponders within that antennas range. The antenna can be mounted up to 5 m

(depending on the antenna) away from the reader. 7 S2510 Reader - Reference Guide April 00 1.3.1 Interfaces The reader has the following connections/interfaces:

Communications interface: RS232, RS422 or RS485 (F & G)

8 general purpose I/O lines (B)

2 Open Collector outputs (E)

Synchronization bus (C)

Carrier Phase Synchronization bus (D)

Power connector (A) Indicator outputs connector (H)

Antenna connector (I) 1.3.2 Communications Protocols There are two protocols that can be used with the S251B Reader, they are:

ASCII Protocol. This is a simple protocol that you can use to send ASCII charac-

ter commands to the reader. It is possible to use a standard termi-

nal emulator program to send ASCII commands. The ASCII protocol can only be used with RS232 or RS422. TIRIS Bus Protocol. This is a binary protocol suitable for communication be-

tween a controlling device (for example: a PC) and one or more readers. For example with a single reader using an RS232 inter-

face or up to 31 readers using RS422/485. The TIRIS Bus protocol can be used with RS232 or RS422/485. If you are using one reader per controlling device you may choose the protocol that best suits your requirements. However, if you have more than one reader connected to a bus running under a controlling device then you must use the TIRIS Bus Proto-

col. For details regarding these communications protocols, please refer to the relevant manual (11-06-21-037 for the ASCII Protocol, 11-06-21-053 for the TBP), available at the TIRIS home page: http://www.tiris.com 8

CHAPTER 2 Hardware Chapter 2:Hardware This chapter describes the hardware of the S251B Reader. It tells you which modules together comprise the reader. It also describes the front panel (switches connections etc.) and specifies the electrical inputs and outputs. Topic Page 2.1 General........................................................................................................10 2.2 Product Description...................................................................................10 2.2.1 Connectors...........................................................................................11 2.2.1.1 A - Supply Connector..................................................................12 2.2.1.2 B - General Purpose Inputs/Outputs...........................................13 2.2.1.3 C - Synchronization Interface .....................................................14 2.2.1.4 D - Carrier Phase Synchronization Interface ..............................15 2.2.1.5 E - Open Collector & I/Os ...........................................................16 2.2.1.6 F1 & F2 - RS232 Communication Interface................................17 2.2.1.7 G - RS422/RS485 Communications Interface ............................18 2.2.1.8 H - Indicator Outputs...................................................................19 2.2.1.9 I - Antenna Connector.................................................................19 2.2.2 Switches...............................................................................................20 2.2.3 Indicators..............................................................................................22 2.2.4 Potentiometers .....................................................................................22 2.2.4.1 RF Power Adjustment.................................................................22 2.2.4.2 EMI / Sync. Level Adjustment.....................................................22 2.3 Mechanical Information .............................................................................22 9 S2510 Reader - Reference Guide April 00 2.1 General This chapter describes the hardware comprising the S251B Reader and provides the electrical specifications. 2.2 Product Description The S251B Reader is contained in a IP20 polycarbonate box that enables easy inte-

gration into standard racks and cabinets. The reader is shown in Figure 1 and the front panel is shown in Figure 2. Figure 2: S251B Front Panel (with connector covers removed) The reader comprises two modules assembled together in a housing. The modules are:

Control Module which contains all the circuitry required to communicate via the interface to the computer and external devices, to provide syn-

chronization, and to control the RFM. It includes a Dynamic Auto Tuning (DAT) function to automatically tune the antenna to reso-

nance. Radio Frequency Module (RFM) which contains all the analog functions of a TI-

RIS reading unit that are needed to initialize a TIRIS transponder and to detect its return signal. 10 April 00 2.2.1 Connectors Chapter 2. Hardware There are 10 connectors on the S251B, 7 WECO connectors, the antenna connector, a 9-pin sub-D RS232 connector, a 6-pin connector for the indicator outputs and a 2-

pin connector for the antenna. The function of each pin on each connector (except the RS232 sub-D connector) is described in the following paragraphs. Their location is shown in Figure 3. Figure 3: S251B Connector Locations A 1 2 J 1 1 2 3 B C D 15 1 6 1 6 Power

+ -

Fuse General Purpose Input / Output Synchronization Power Range Setting On Reader S251B CTL Setup On 1 O.C. - I/O On 1 RF Power Output Adj. EMI / Sync. Level Adj. L !

O.K. L "

Antenna Tuning EMI TX Active Read O.K. RS232 RS422 / 485 1 6 1 6 1 E F1 F2 G H On 1 6 RS422 RS485 DAT Antenna 2 1 I In order to gain access to the fuse and connector J you must first remove the upper two screws holding the front panel on, remove the plastic cover strip and then replace the two screws. To gain access to the connectors H and I you must first remove the lower two screws holding the front panel on, remove the plastic cover strip and then replace the two screws. The pins are not individually numbered on the connectors themselves (just on Figure 3 for your convenience). The connectors are all marked on Figure 3 with a letter (from A to I) and are listed in Table 1 which also shows the section that describes them Table 1: List of Connectors Identifying Letter Function Supply Connector General Purpose Inputs/Outputs Synchronization Interface Carrier Phase Synchronization Interface Open Collector Inputs/Outputs RS232 Connector (9-pin SEB-D) A B C D E F1 11 Section 2.2.1.1 2.2.1.2 2.2.1.3 2.2.1.4 2.2.1.5 2.2.1.6 S2510 Reader - Reference Guide Table 1: List of Connectors Identifying Letter Function F2 G H I RS232 Connector RS422/RS485 Connector Indicator Outputs Antenna Connector 2.2.1.1 A - Supply Connector April 00 Section 2.2.1.6 2.2.1.7 2.2.1.8 2.2.1.9 The Reader requires a single DC supply voltage (10 to 24 V) through a 2-pin connec-

tor marked with + for positive and for negative The Power Range Setting wired jumpers (marked J in Figure 3) and the actual power supply have a direct consequence on the operating temperature of the reader as shown in Table 2. Table 2: Power Range Settings Setting Input Power Operating Temperature Range Pins 1 + 2 connected 10 - 15 V 15 - 24 V

-20 to +70 C

-20 to +70 C

(max. I_VSP = 0.9 Apeak see caution 1). Pins 2 + 3 connected 18 - 24 V

-20 to +70 C CAUTION:

1. In order to operate the reader over the full temperature range with pins 1 + 2 connected (15 to 24 V), the maximum current consumption must not exceed 0.9 Apeak. Exceeding this value could result in unreliable functioning of the dynamic auto tuning, or sharp limitation of the transmitter output power because of internal protection. If either of these should occur, switch the device off and allow it time to recover; and then when it is switched on again it will revert to normal oper-

ation. Note that if either of these occur it is an indication that the reader is not being operated within its specifications. 2. The reader itself generates heat, therefore if it is incorporated into a housing you must ensure (by proper design and/or cooling) that the temperature immediately surrounding the reader does not exceed the operating temperature range. 1.. Table 3: Supply Connector Signal Description Direction

+

-

Positive supply Ground input input Pin 1 2 12 April 00 Chapter 2. Hardware Table 4: Supply Connector - Specifications Parameter Minimum Maximum Logic Supply Voltage VSL Logic Supply current ISL 10 V

-

24 V 2.5 A 2.2.1.2 B - General Purpose Inputs/Outputs The Reader has eight general purpose TTL-Level Inputs/Outputs. By means of the configuration set-up, they can be set in groups of four to be Input or Output. Further-

more, there is a reset connection and a 5 V regulated output. The pin assignment is given in Table 5 and their specifications are given in Table 6. Table 5: General Purpose Inputs/Outputs Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Signal GP IO 7 GP IO 6 GP IO 5 GP IO 4 GP IO 3 GP IO 2 GP IO 1 GP IO 0

-

IN1 IN0 RESET-

VCC GND GND Description General Purpose I/O 7 General Purpose I/O 6 General Purpose I/O 5 General Purpose I/O 4 General Purpose I/O 3 General Purpose I/O 2 General Purpose I/O 1 General Purpose I/O 0 not connected Input 1 Input 0 Reset Regulated 5 Volt dc Supply

(see note) Signal Ground Signal Ground Direction Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output

-

Input Input Input Output

-

-

CAUTION:

Do not connect any power supply to pin 13 as it would damage the reader. The total consumption of the two VCC outputs (General Purpose Inputs/Outputs pin 13 together with Open Collec-

tor & I/Os - pin 1) must not exceed 500 mA. 13 S2510 Reader - Reference Guide April 00 Table 6: General Purpose Inputs/Outputs - Specifications Parameter Minimum Maximum GP IO Output Voltage @ 6 mA Low level High level General Purpose IO Output Current Low level High level GP IO 1 to 4 total Output Current GP IO 5 to 8 total Output Current Regulated 5 V Output Current

-

3.15 V

-

-

0.9 V 5.25 V 25 mA 16 mA 10 mA 10 mA 100 mA 2.2.1.3 C - Synchronization Interface The synchronization interface is used to establish hard wired synchronization with other readers through a single or double pair of wires. Its pin assignment is given in Table 7 and its specifications are given in Table 8. Table 7: Synchronization Interface Pin Signal Description Direction 1 2 3 4 5 6 Sync Rx+

RS422/RS485 non-inverted synchronization data Sync Rx-

RS422/RS485 inverted synchronization data GND Signal ground Sync Tx+

RS422/RS485 non-inverted synchronization data Sync Tx-

RS422/RS485 inverted synchronization data GND Signal ground Input Input

-

Output Output

-

Table 8: Synchronization Interface - Specifications Parameter Mode of Operation Number of Drivers On Line Number of Receivers On Line Maximum Cable Length Maximum Data Rate Specification Differential 32 32 1200 m 10 Mbits/s Maximum Common Mode Voltage

+12 V / -7 V Driver Voltage Driver Load Driver Output Short Circuit Limit High > +1.5 V Low < -1.5 V 60 mA 150mA to GND 250mA to VCC 14 April 00 Chapter 2. Hardware Table 8: Synchronization Interface - Specifications Parameter Receiver Input Receiver Sensitivity Receiver Hysteresis Specification 12 k 200 mV 60 mV 2.2.1.4 D - Carrier Phase Synchronization Interface The carrier phase synchronization interface is used to establish hard wired carrier phase synchronization with other readers through a single pair of wires. Its pin as-

signment is given in Table 9 and its specifications are given in Table 10. Table 9: Carrier Phase Synchronization Interface Pin Signal Description Direction 1 2 3 4 5 6 Sync Rx+

RS422/RS485 non-inverted synchronization data Sync Rx-

RS422/RS485 inverted synchronization data GND Signal ground Sync Tx+

RS422/RS485 non-inverted synchronization data Sync Tx-

RS422/RS485 inverted synchronization data GND Signal ground Input Input

-

Output Output

-

Table 10: CPS Interface - Specifications Parameter Mode of Operation Number of Drivers On Line Number of Receivers On Line Maximum Cable Length Maximum Data Rate Specification Differential 32 32 1200 m 10 Mbits/s Maximum Common Mode Voltage

+12 V / -7 V Driver Voltage Driver Load Driver Output Short Circuit Limit Receiver Input Receiver Sensitivity Receiver Hysteresis High > +1.5 V Low < -1.5 V 60 mA 150mA to GND 250mA to VCC 12 k 200 mV 60 mV 15 S2510 Reader - Reference Guide April 00 2.2.1.5 E - Open Collector & I/Os This connector provide two open collector connections to and from the reader, plus the RXSS output (used to set the local noise level), another 5 V regulated output and an interrupt input. Its pin assignment is given in Table 11 and its specifications are given in Table 12. Table 11: Open Collector & I/Os Pin Signal Description Direction 1 2 3 4 5 6 VCC OC1 OC0 GND INT0 RXSS-

Regulated 5 Volt dc Supply (see note 1 below) Open collector 1 Open collector 0 Signal ground Interrupt 0 (see note 2 below:) RXSS Output Output Output

-

Input Output Notes:

1. The total consumption of the two VCC outputs (Open Collector & I/

Os - pin 1 together with General Purpose Inputs/Outputs pin 13) must not exceed 500 mA. 2. This function is not used or supported by TIRIS standard firmware. It can however be used, if required, by customers who are provid-

ing their own software. Table 12: Open Collector & I/Os - Specifications Parameter Minimum Maximum Open Collector Voltage to GND 1.3 V Open Collector Current Regulated 5 V Output Interrupt Input RXSS 4.75 V 4.75 V

-

80 V 500 mA 5.25 V 5.25 V 5.25 V 16 April 00 Chapter 2. Hardware 2.2.1.6 F1 & F2 - RS232 Communication Interface Depending on the DIP-Switch configuration, the Reader will either communicate via the RS232, RS422 or RS485 interface. There are two interface connectors either of which can be used for an RS232C con-

nection. They are: a standard RS232 Interface 9-pin SUB-D male connector (F1 on Figure 3) and a 6-pin WECO connector (F2 on Figure 3). Both of these connectors allow communication between the reader and a controlling device. The pin assign-

ment for the SUB-D connector is given in Table 13 and the pin assignment for the WECO connector is given in Table 14. Both, the ASCII and TIRIS Bus protocol can be used with the RS232 interface. Table 13: RS232 SUB-D Connector Pin Signal Description Direction 1 2 3 4 5 6 7 8 9

-

TxD RxD DTR GND DSR

-

-

-

Not connected Transmit Data Receive Data Data Terminal Ready Signal Ground

-

Output Input Input

-

Data Set Ready Output Not connected Not connected Not connected

-

-

-

Table 14: RS232 WECO Connector Pin Signal Description Direction 1 2 3 4 5 6 RxD DTR GND TxD DSR GND Receive Data Data Terminal Ready Signal Ground Transmit Data Data Set Ready Signal Ground Input Input

-

Output Output

-

All interface parameters are according to the RS232 specification and are not given in detail in this manual. The DTR and DSR lines are currently not used for any pur-

pose. 17 S2510 Reader - Reference Guide April 00 2.2.1.7 G - RS422/RS485 Communications Interface Depending on the DIP-Switch configuration, the Reader will communicate via the RS232, RS422 or RS485 interface. RS422/485 connections are made via the 6-pin WECO connector (G in Figure 3). Its pin assignment is given in Table 15 and its spec-

ifications are given in Table 16. Both, the ASCII and TIRIS Bus Protocol can be used with the RS422 interface. The ASCII protocol (or any other full-duplex protocol) cannot be used with the RS485 interface. Table 15: RS422/RS485 Connector Pin Signal Description Direction RS422 Direction RS485 1 2 3 4 5 6 Rx+/Tx+

Rx-/Tx-

RS422/RS485 non-

inverted data RS422/RS485 inverted data GND Signal Ground Tx+

Tx-

RS422 non-inverted data RS422 inverted data Input Input

-

Output/High Impedance Output/High Impedance GND Signal Ground

-

Input/Output Input/Output

-

-

-

-

Table 16: RS422/RS485 Communications Interface - Specifications Parameter Mode of Operation Number of Drivers On Line Number of Receivers On Line Maximum Cable Length Maximum Data Rate Specification Differential 32 32 1200 m 10 Mbits/s Maximum Common Mode Voltage

+12 V / -7 V Driver Voltage Driver Load Driver Output Short Circuit Limit Receiver Input Receiver Sensitivity Receiver Hysteresis 18 High > +1.5 V Low < -1.5 V 60 mA 150mA to GND 250mA to VCC 12 k 200 mV 60 mV April 00 Chapter 2. Hardware 2.2.1.8 H - Indicator Outputs This connector (H in Figure 3) is a 2 x 3-pin (double row) pin header connection which provides the LED output signals. Its pin assignment is given in Table 17 and its spec-

ifications are given in Table 18. Table 17: Indicator Outputs Pin Signal Description Direction 1 2 3 4 5 6 ACTIVE Open collector output: RF Module transmitter signal VR270 O.K. VR270 RXSA GND Current limited output: (270 in series to VCC) Open collector output: O.K. signal Current limited output (270 in series to VCC) Receiver signal strength adjust output to monitor the receiver signal strength threshold level Signal ground Output Output Output Output Output

-

Table 18: Indicator Outputs - Specifications Parameter Minimum Maximum Open Collector (voltage) Open Collector (current) Maximum voltage at current limiting 270 resistor

-

-

-

Receiver signal strength output voltage (RXSA) 0.7 V 10 V 80 mA 5 V 1.7 V 2.2.1.9 I - Antenna Connector The antenna must be connected to the reader via the antenna terminals. The pin as-

signment for the antenna connector is given in Table 19. If a custom designed anten-

na is used, it must be within the specifications defined in Table 20 in order to ensure that the dynamic autotuning facility functions correctly. Table 19: Antenna Pin 1 2 Signal ANT ANT Description Tx/Rx antenna Tx/Rx antenna Table 20: Antenna - Specifications Parameter Antenna Resonance Voltage Antenna Inductance Antenna Q-factor Minimum

-

26.0 H 40 Maximum 380 Vpeak 27.9 H 350 19 S2510 Reader - Reference Guide April 00 2.2.2 Switches There are three banks of DIP switches on the S251B Reader, one is for the Control Module set-up (12 switches), one is for the RS422/RS485/DAT settings (5 switches), and the third one is for the synchronization settings (5 switches). The Control Module set-up switches are listed in Table 21, the RS422/RS485/DAT settings are listed in Table 23, and the synchronization settings switches are listed in Table 24. The ON position and switch 1 are always shown in the switch bank, the switch is on when the switch is set to the up position. Figure 4: CTL Setup Switches ON 1 Table 21: CTL Setup DIP Switches Switch 1 2 3 4 5 6 7 8 9 10 11 12 OFF RAM - VCC ON

-

Chip Select ROM for TIRIS Standard Firmware Reserved for Software Development Reserved for Software Development Chip Select RAM for TIRIS Standard Firmware Chip Select RAM for TIRIS Standard Firmware PSEN Reserved for Software Development Reserved for Software Development See Table 22 See Table 22 TIRIS Standard Configuration Customer Specific Configuration Reserved Reserved TXCT-ON *

Not Connected

* When this switch (11) is switched either from ON-to-OFF or from OFF-to-

ON the readers transmitter is activated for 10 seconds. Table 22: I/O Setting Switches (6 & 7) SW6 OFF ON OFF SW7 OFF No effect Comment ON/OFF Reset reader by switching RS232 DTR line ON Can be used by customer firmware for hardware handshake 20 April 00 Chapter 2. Hardware Figure 5: RS422/RS485/DAT Switches ON 1 Table 23: RS422/RS485/DAT Settings DIP Switches Switch 1 2 3 4 5 OFF RS422 RS422

-

ON RS485 RS485 RS422/RS485 Rx+/Rx-

line-to-line termination (120 ) DAT Disabled DAT Enabled DAT LEDs Disabled DAT LEDs Enabled Notes:

SW1 and SW2 must always be in the same position as each other, either both OFF or both ON. Figure 6: Synchronization DIP Switches ON 1 Table 24: Synchronization DIP Switches Switch OFF ON 1 2 3 4 5

-

-

-

Set the RFM to Master

-

Synchronization Rx+ line pull-up (180 ) Synchronization Rx- line pull-down (180 ) RS422/RS485 Rx+/Rx- line-to-line termination (120 ) Set the RFM to Slave in CPS Bus CPS line-to-line termination (120 ) 21 S2510 Reader - Reference Guide April 00 2.2.3 Indicators There are six LEDs on the front panel of the reader they are described in Table 25. Table 25: Indicators Indicator Description EMI Indicates the presence of Electro Magnetic interference TX Active Read O.K. Antenna Tuning L O.K. L Indicates activation of the RF transmitter Indicates a response from a valid transponder Antenna out of tune, inductance too high The DAT has tuned the antenna to maximum resonance voltage Antenna out of tune, inductance too low The TX Active and Read O.K. LED lines are also made available for external use if required, details are given in section 4.7. 2.2.4 Potentiometers There are two potentiometers that can be adjusted through the reader front panel, they are: the RF Power Output adjustment potentiometer (2.2.4.1) and the EMI /

Sync. Level adjustment potentiometer (2.2.4.2). 2.2.4.1 RF Power Adjustment The potentiometer can be used to adjust the internal oscillator pulse width and thus the generated antenna voltage/field strength. Turning the potentiometer clockwise causes the field strength to be increased. 2.2.4.2 EMI / Sync. Level Adjustment This potentiometer allows the receiver signal strength threshold level to be adjusted for wireless synchronization. Turning the potentiometer clockwise results in maxi-

mum sensitivity. There is one fuse on the S251B that is: 2A Slow-blow. If the fuse should blow, replace it with the replacement fuse supplied with your reader. 2.3 Mechanical Information The mechanical dimensions and weight are given in Table 26. Table 26: Mechanical Information Parameter Height Width Length Weight Value 120 mm 120 mm 200mm 900 g 22 CHAPTER 3 Synchronization Chapter 3:Synchronization If you are using more than one reader in an application, it may mean that you need to synchronize their operation so that they do not interfere with each other. This chapter describes the various synchronization options. Topic Page 3.1 Introduction ................................................................................................24 3.2 Types of Synchronization .........................................................................24 3.2.1 No Synchronization ..............................................................................24 3.2.2 Wireless Synchronization.....................................................................25 3.2.3 Wired Synchronization .........................................................................25 3.2.4 Combined Wireless/Wired Synchronization .........................................25 3.2.5 Master/Slave Synchronization..............................................................26 3.2.5.1 M/S Synchronization without Acknowledgement. ......................26 3.2.5.2 M/S Synchronization with Acknowledgement. ...........................26 3.2.5.3 Triggered Synchronization..........................................................27 3.2.6 Carrier Phase Synchronization ............................................................27 23 S2510 Reader - Reference Guide 3.1 Introduction April 00 Where multiple readers are operating in the same area, it is necessary to coordinate the activities of those readers to avoid mutual interference. This is known as synchro-

nization. Synchronization in this context means that the readers in your application are controlled in such a way that they do not interfere with each other. There are several types of synchronization that can be used depending on the situ-

ation in a particular application, for example: the type of transponder, the type of op-

eration performed on that transponder (Charge-only read, General read, Program page, Lock page), the size of the antennas and the speed of the transponder. The different kinds of synchronization are described in section 3.2. How to actually set-

up your system to use the synchronization youve chosen is described together with the other installation procedures in Chapter 5. The distance that readers antennas have to be separated before the need for some method of synchronization is required, varies with local conditions, for in addition to purely airborne (radiated) interference, signals can travel from one reader to another via metal structures (conducted). Metal structures can include the frames of metal buildings, reinforcing bars in concrete floors and power or data cables. 3.2 Types of Synchronization The S251B Reader can be configured to synchronize in a number of different ways:

No Synchronization (3.2.1) Wireless Synchronization (3.2.2) Wired (3.2.3) Combined Wireless/Wired (3.2.4) Master/Slave Synchronization (3.2.5) Carrier Phase Synchronization (3.2.6) 3.2.1 No Synchronization This option is only used in conjunction with Software synchronization, or if there is only a single reader. No sync. and Master/Slave sync without acknowledgement are the fastest methods of reading transponders. If all readers are connected by the same RS485 data network, coordination of the readers can be controlled directly by the Host Computer. For example, the Host Computer may issue a Broadcast command for all readers to simultaneously perform a read cycle and buffer the result. Another technique possible using the data network is to issue individual commands to each reader in turn. This technique is used when writing data to Multipage Transponders (MPTs). Where a PLC has a number of point-to-point connections to readers, it is also possible to coordinate the activities via the ladder logic. With Software synchronization all readers will be simultaneously transmitting or, each reader individually operating. In both cases the readers can be configured to have No Synchronization. 24 April 00 Chapter 3. Synchronization 3.2.2 Wireless Synchronization Wireless synchronization can be used to control the coordination of readers, with standard antennas, provided the electrical noise in the environment is low for the type of antenna in use and the noise levels are constant. Wireless synchronization is only valid for charge-only reading of transponders. During operation, when the reader detects noise above the adjusted background lev-

el it assumes that it is another reader and backs-off for a set period before com-

mencing its own cycle. Wireless synchronized readers can read together or alternately. Advantages:

1. There are no wires to run. 2. All readers are autonomous (no Master unit). 3. Enables Hand held readers to co-exist with fixed units (using wireless syn-

chronization). Disadvantages:

1. 2. 3. In noisy environments, there is too much sensitivity with larger antennas

(G04 and larger custom antennas) to allow accurate setting of the back-

ground levels. It is not suitable for operations other than Charge-only read. It cannot be used when other readers are writing information to transpond-

ers. 4. Where the environmental conditions change, for example: a ground loop antennas characteristics are changed by a vehicle over it, the synchroni-

zation adjustment could be wrong. 3.2.3 Wired Synchronization Wired Synchronization works in the same way as wireless synchronization with the exception that the reader obtains its information about the presence of another read-

er through a hard wired connection and not via the antenna. Advantages:

1. It is a Peer-to-Peer network and does not need a Master unit. 2. It use a single twisted pair cable. Disadvantages:

It is only suitable for charge-only reading of transponders. 1. 2. It cannot be used when other readers are writing information to transpond-

ers. 3. If the power fails at any of the readers the bus fails. 3.2.4 Combined Wireless/Wired Synchronization When this option is selected, groups of reader connected by the wired synchroniza-

tion cabling can synchronize with other groups of wired synchronization readers, or with individual readers, by using wireless synchronization. The advantages and disadvantages of both wireless and wired synchronization as given above still apply. 25 S2510 Reader - Reference Guide April 00 3.2.5 Master/Slave Synchronization Master/Slave Synchronization is probably the most commonly used form of synchro-

nization. One reader is configured to be the Master and this reader then controls all the other readers, which are configured as Slaves. There are three variants:

Master/Slave Synchronization without Acknowledgement, Master/Slave Synchronization with Acknowledgement Triggered Synchronization. 3.2.5.1 M/S Synchronization without Acknowledgement. This method of synchronization is the fastest method of reading transponders and was originally developed for reading tagged vehicles at speed. It assumes that all readers are on the same synchronization bus and the readers would not, for exam-

ple, recognise a handheld reader that is trying (probably unsuccessfully) to perform a reading. Advantages:

1. Uses a single twisted pair cable. 2. Has the fastest read rate. 3. The Master can be used for Charge-only read or Write/Program. Disadvantages:

1. All readers must be on the same synchronization bus. 2. If the Master fails, all units stop. 3. Slave units cannot be individually tested without the Master running. 4. Slaves must perform exactly the same RF-Task as the Master (read the same page, write the same data to a transponder). 3.2.5.2 M/S Synchronization with Acknowledgement. In Master/Slave Synchronization without acknowledgement, if a slave reads a trans-

ponder and the master doesnt, the slave may miss the next pulse while it is process-

ing the reading from that transponder. In Master/Slave with Acknowledgement the Master has to wait until all slaves have completed their current cycle before initiating the next cycle. This is achieved by using a 4 wire synchronization bus (twin twisted pair) with the slave transmit lines coupled back to the Master receive lines. This method has the following advantages over Master/Slave without Acknowledge 1. All units can Write/Program transponders (providing they do it together). 2. They wait for the slowest to complete. Disadvantages:

1. The cable is a twin twisted pair. 2. The readers cannot be too close if writing is performed, because of the pos-

sibility of corrupted data. This restriction also includes the paged read of multipage transponders. 26 April 00 Chapter 3. Synchronization 3.2.5.3 Triggered Synchronization Triggered Synchronization is a Master/Slave Synchronization Bus where there is just a pulse signal. All readers are configured as masters, but it is only one unit or a trig-

ger pulse source that issues the synchronization pulse at suitable intervals for the re-

quired operations on the transponder. The more complex version of this is known as a Timing Bus, when different time win-

dows are defined for different operations to be carried out, for example: If multiple readers are required to read addressed pages of Multipage transponders, then to write data back to the transponders, the timing bus would start a read window lasting 90 ms then initiate a time window of 320 ms for a write operation. In this way the dif-

fering times required for the two operations can be accommodated. At the same time the readers would be instructed thru the communication interface, about which com-

mand to execute during each window. Therefore the slaves have to receive their command before the master. Advantages:

1. The master unit has total control over the coordination of the connected de-

vices and can allow windows for particular operations. 2. Reading and Writing can be accommodated, if there is sufficient separation to prevent data corruption during the Write process. Disadvantages:

1. Cannot be used for addressing MP transponders if readers are close to-

gether as addressing conflicts can arise. 2. Carrier Phase synchronization cannot be used. 3.2.6 Carrier Phase Synchronization In some applications it is necessary to use several charge-up antennas close to each other. In these circumstance, the magnetic charge-up fields generated by different antennas superimpose on each other and may cause a beat effect on the magnetic charge-up field, due to the slightly different transmission phases of different Power readers. This effect will not occur when the transmitters of different readers are op-

erated from the same oscillator signal. This is Carrier Phase Synchronization where all of the readers in a system use the same oscillator. Carrier Phase synchronization must be used whenever Gate or Stick antennas are facing each other and if they are inside the distances D1 or D2 as given in Table 27 (Figure 7 shows the places to measure D1 and D2). This ensures that there will not be any beat effect between the antennas. Note:

Remember that putting two antennas close together also changes antenna inductance, so that the antennas may no longer be tuneable to resonance. 27 S2510 Reader - Reference Guide April 00 Figure 7: Distance between Antennas (top view) Table 27: Distances Between Antennas Antenna type RI_ANT_S02 <=> RI_ANT_S02 RI_ANT_G01 <=> RI_ANT_G01 RI_ANT_G02 <=> RI_ANT_G02 RI_ANT_G04 <=> RI_ANT_G04 Distance D1 Distance D2

[m]

0.8 1.7 1.3 2.0

[m]

1.0 1.5 1.0 1.7 28 CHAPTER 4 Installation Chapter 4:Installation This chapter provides you with the information that you need to know in order to in-

stall the reader. This chapter also describes how to incorporate the various synchronization options. Topic Page 4.1 Introduction ................................................................................................30 4.2 General........................................................................................................30 4.3 Mechanical Mounting.................................................................................30 4.3.1 Power Supply .......................................................................................30 4.4 Communication ..........................................................................................31 4.4.1 Configuration........................................................................................31 4.4.2 RS232 ..................................................................................................31 4.4.2.1 Activation ....................................................................................32 4.4.3 RS422 ..................................................................................................32 4.4.4 RS485 ..................................................................................................33 4.5 Synchronization .........................................................................................34 4.5.1 Software Controlled..............................................................................34 4.5.2 Wireless Synchronization.....................................................................34 4.5.3 Wired and Combined Wireless/Wired Synchronization........................34 4.5.4 Master/Slave (without acknowledgement) & Triggered Synch.............35 4.5.5 Master/Slave (with acknowledgement) ................................................36 4.5.6 Transmitter Carrier Phase Synchronisation (CPS) ..............................37 4.6 General Purpose Input/Outputs................................................................38 4.7 LED Outputs ...............................................................................................39 4.8 Reset ...........................................................................................................39 4.9 Antenna.......................................................................................................40 4.10 RF Power Output Adjustment ...................................................................40 4.11 EMI / Sync. Level Adjustment ...................................................................40 29 S2510 Reader - Reference Guide 4.1 Introduction April 00 Note:

Always ensure that the reader is switched off when making or break-

ing connections to it. 4.2 General The S251B Reader has been designed with easy installation in mind. The following information provides you with any details such as switch settings and so on that you will need to know. 4.3 Mechanical Mounting a. b. c. If you are mounting the reader on a DIN rail TS35, clip the reader into the bot-

tom of the rail and then snap it into the top. or If you are mounting the reader onto a wall where there is No vibration, snap in the four mounting adapters and screw the reader to the wall using M4 screws. or If you are mounting it onto a wall where it may be subject to vibration, open the reader, drill thru the marked mounting holes and screw the reader to the wall using M4 screws and the appropriate washers. WARNING:

CARE MUST BE TAKEN WHEN HANDLING THE S251B. HIGH VOLTAGE ACROSS THE ANTENNA TERMINALS COULD BE HARMFUL TO YOUR HEALTH. IF THE ANTENNA INSULATION IS DAMAGED THE ANTENNA SHOULD NOT BE CONNECTED TO THE S251B. 4.3.1 Power Supply Connect a Regulated dc power supply (between 10 and 24 V providing a minimum of 2A) to the reader - the polarity of the connection is shown on the front panel of the reader. Set the Power Range Setting wire bridge to match your input voltage (see Table 2). We recommend that you use a linear power supply. If this is not possible and you wish to use a switched mode power supply, DO NOT use one that operates below 200 kHz. (switched mode power supplies that operate below 200 kHz. might interfere with transponder signals and thus reduce the reading range). 30 April 00 4.4 Communication Chapter 4. Installation Follow the instructions given in the section that describes the communications set-

up that you have decided to use in your system: Section 4.4.2 for RS232, Section 4.4.3 for RS422 and Section 4.4.4 for RS485. 4.4.1 Configuration CTL Setup switch 8 determines the mode of operation of the control module when power is applied to the control module. When CTL Setup switch 8 is in the OFF po-

sition, standard TIRIS default parameters are used, these are:

- ASCII protocol

- 9600 baud, eight databits, no parity, one stop bit, Xon/Xoff enabled

- Normal Mode

- Wireless synchronization

- I/O 0 to 3 defined as input

- I/O 4 to 7 defined as output and logic high

- Hardware interface RS232C If CTL Setup switch 8 is in the ON position, customer specific parameters are used to operate the Control Module. These application specific parameters are stored in the serial EEPROM on the Control Module. Note:

The setting of CTL Setup switch 8 is only checked after power on. You can use the Software Utility Program which is available on the internet at our site: http://www.tiris.com to configure your reader. In order to configure the reader for customer specific parameters you must connect the reader via the RS232 port (connector F1 or F2) to your host and get connection using the TIRIS standard parameters (with CTL Setup switch 8 is in the OFF posi-

tion). Change the default parameters to the customer specific parameters and save them. Set CTL Setup switch 8 to the ON position and reset the reader. The reader will then work with the customer specific parameters. Either connect a 9-pin SUB-D female plug to the SUB-D connector, or connect up the 6-pin WECO connector marked RS232 on the readers front panel, the pin signals are given in Table 28 or Table 29. Table 28: RS232 9-pin Connector Pin Signal Description Direction 1 2 3 4

-

TxD RxD DTR Not connected Transmit Data Receive Data Data Terminal Ready

-

Output Input Input 31 4.4.2 RS232 S2510 Reader - Reference Guide April 00 Table 28: RS232 9-pin Connector Pin Signal Description Direction 5 6 7 8 9 GND DSR

-

-

-

Signal Ground Data Set Ready Not connected Not connected Not connected

-

Output

-

-

-

Table 29: RS232 WECO Connector Pin Signal Description Direction 1 2 3 4 5 6 RxD DTR GND TxD DSR GND Receive Data Data Terminal Ready Signal Ground Transmit Data Data Set Ready Signal Ground Input Input

-

Output Output

-

4.4.2.1 Activation 4.4.3 RS422 The Data Terminal Ready signal (DTR) is connected to the reset/watchdog circuit of the S251B Reader. This ensures a PC controlled microcomputer initialization before the default Read Mode is started. When power is applied to the reader the Data Set Ready signal (DSR) of the RS232-

C interface is activated. Connect the WECO (marked RS422 / 485) connector as shown in Table 30. Set the switches as shown in Figure 8. If you are only using one reader the line terminal switch 3 must be switched to ON, if you are using more than one reader only the last reader in the line must be switched to ON (all other readers to OFF). 32 April 00 Chapter 4. Installation Figure 8: Switch Settings for RS422 ON 1 Table 30: RS422/RS485 Connector Pin Signal Description Direction RS422 Direction RS485 1 2 3 4 5 6 Rx+/Tx+

Rx-/Tx-

RS422/RS485 non-

inverted data RS422/RS485 inverted data GND Signal Ground Tx+

Tx-

RS422 non-inverted data RS422 inverted data Input Input

-

Output/High Impedance Output/High Impedance GND Signal Ground

-

Input/Output Input/Output

-

-

-

-

Connect the WECO (marked RS422 / 485) connector as shown in Table 30. Set the switches as shown in Figure 9. If you are only using one reader the line terminal switch 3 must be switched to ON, if you are using more than one reader only the last reader in the line must be switched to ON (all other readers to OFF). Figure 9: Switch Settings for RS485 4.4.4 RS485 ON 1 33 S2510 Reader - Reference Guide 4.5 4.5.1 Synchronization Software Controlled April 00 There is no special wiring required for this type of synchronization. Make sure that you set the software configuration to No Sync. when you are configuring the reader. 4.5.2 Wireless Synchronization There are no switch or jumper settings for wireless synchronization. Make sure that you set the software configuration to wireless synchronization when you are config-

uring the reader. 4.5.3 Wired and Combined Wireless/Wired Synchronization Figure 10 shows in which way the S251B Reader must be connected for a wired and a combined wireless/wired synchronization. Make sure that you set the software con-

figuration to match when you are configuring the reader. Table 31 explains the set-

ting of the Synchronization DIP switches 1, 2 & 3. Figure 10: Wired & Combined Wireless/Wired Sync. Interface Connection Table 31: Wired and Combined Wireless/Wired Synchronization Line Termination Dip Switch SW1 SW2 SW3 UNIT 1:

UNIT 2...UNIT n-1:

UNIT n:

ON ON ON OFF OFF OFF ON ON ON (see Note) Note:

If the distance between Unit 1 and Unit n is less than approximately 400 m, DIP switch SW3 can be left OFF. 34 April 00 Chapter 4. Installation 4.5.4 Master/Slave (without acknowledgement) & Triggered Synch. Figure 11 shows the way that the Readers have to be connected for master/slave synchronization without acknowledgment; and triggered synchronization. Make sure that you set the software configuration to Master or Slave (according to Table 32 and Table 33) acknowledgement) when you are configuring the reader. Table 32 and Table 33 show the settings of the Line termination DIP switches. Figure 11: Master/Slave Sync. Interface Connection (without Ack.) Table 32: Master/Slave Synchronization Without Acknowledgement Line Termination Dip Switch Unit 1:

(Master) Unit 2...Unit n-1:

(Slaves) UNIT n: (Slave) SW1 SW2 SW3 ON ON OFF OFF OFF OFF ON ON ON (see Note) Note:

If the distance between Unit 1 and Unit n is less than approximately 400 m, DIP switch SW3 can be left OFF. Table 33: Triggered Synchronization Line Termination Dip Switch UNIT 1:

Trigger Unit UNIT 2...UNIT n-1:

(Master) UNIT n: (Master) SW1 SW2 SW3 Termination not required Termination not required Termination not required OFF OFF OFF ON ON ON (see Note) 35 S2510 Reader - Reference Guide April 00 4.5.5 Master/Slave (with acknowledgement) Figure 12 shows the way that the Readers have to be connected for master/slave synchronization with acknowledgement. Make sure that you set the software configuration to Master or Slave (according to Table 34) when you are configuring the reader. Table 34 shows the setting of DIP switch switches 1, 2 & 3. Figure 12: Master/Slave Synchronization Interface Connection Table 34: Master/Slave Synchronization With Acknowledgement Line Termination Dip Switch Unit 1: (Master) Unit 2...Unit n-1:

(Slaves) UNIT n: (Slave) SW1 SW2 SW3 ON ON ON OFF OFF OFF ON ON ON (see Note) Note:

If the distance between Unit 1 and Unit n is less than approximately 400 m, DIP switch SW3 can be left OFF. 36 April 00 Chapter 4. Installation 4.5.6 Transmitter Carrier Phase Synchronisation (CPS) To allow you to overcome the beat effect, the pulse width modulated oscillator signal is accessible at the CPS connector D. All readers to be driven by one oscillator must have their CPS connectors connected together as shown in Figure 13. DIP switch Synchronization-SW4 determines whether the internal oscillator or the external oscillator signal is used. When the DIP switch Synchronization-SW4 is OFF, the internal oscillator is used and the reader is referred to as an oscillator MASTER. When the DIP Switch Synchronization-SW4 is ON, the external oscillator signal is used and the reader is referred to as an oscillator SLAVE. Note:

Only one oscillator MASTER is allowed per synchronized system. Figure 13: Carrier Phase Synchronisation Interface Connection to other units Master Slave If you are using carrier phase synchronization you must configure your system to Master/Slave in order to have one common master. 37 S2510 Reader - Reference Guide April 00 4.6 General Purpose Input/Outputs The S251B Reader has 8 connections that can be defined as either inputs or outputs

(TTL level). These input/outputs must be configured in groups of 4 as shown in Table 35. Table 35: General Purpose Inputs/Outputs I/O I/O 0 1 2 3 4 5 6 7 I I I I I I I I I I I I O O O O O O O O I I I I O O O O O O O O I = Input; O = Output 38 April 00 4.7 LED Outputs Chapter 4. Installation The signals used for the indicator LEDs (Read O.K. and Transmitting) are available at Indicator Outputs connector (H), they can be used to drive external LEDs or buzz-

ers, they must be connected as shown in Figure 14. Ensure that the values given Ta-

ble 18 are not exceeded. Figure 14: Connecting the LED Outputs 4.8 Reset The S251B Reader provides a connection for an external reset on pin 12 of the Gen-

eral Purpose Input / Output connector (B). This pin can be used reset the S251B Reader externally. You can apply an external reset to the reader by connecting a push-button to the connectors as shown in Figure 15. Figure 15: RESET Push-button Wiring

-

T E S E R D N G 2 1 5 1 G E N E R A L I/O PO RT 39 S2510 Reader - Reference Guide April 00 4.9 Antenna The S251B Reader can be used together with the TIRIS antennas RI-ANT-G01E, RI-

ANT-G02E, RI-ANT-G04E and RI-ANT-S02C. If you wish to use it with your own de-

sign antenna that antenna must conform to the specifications given in Table 36. Note:

The Stick Antenna (RI-ANT-S02C) must only be used together with a reader supply voltage up to 12 V. If you use this antenna with a higher reader supply voltage the antenna becomes too warm which effects the antennas Q. Table 36: Antenna Specifications Parameter Antenna Resonance Voltage Antenna Inductance Antenna Q-factor Minimum

-

26.0 H 40 Maximum 380 Vpeak 27.9 H 350 The antenna must be connected to the terminals marked Antenna on the S251B. 4.10 RF Power Output Adjustment Use the RF Power Output Adj. potentiometer to adjust the internal oscillator pulse width and subsequently the antenna output voltage to conform to your local regula-

tions. Turning the potentiometer clockwise causes the field strength to increase. 4.11 EMI / Sync. Level Adjustment EMI / Sync. Level Adj. potentiometer to adjust the receiver signal strength threshold for the wireless synchronization. Turning the potentiometer clockwise results in a maximum sensitivity. If wireless synchronization is used, it is important that the EMI/Sync level Adj. poten-

tiometer is correctly adjusted. This is one of the final adjustments to the reader and is done on site in the final location once the antenna has been tuned and ALL THE OTHER READER ARE SWITCHED OFF. Turning the potentiometer adjusts the receiver signal level threshold and you must set the readers base level noise in its final location, so that any signal larger than the base level triggers the synchronization algorithm. Send a single X (execute command) to the reader to stop any continuous reading, and then turn the potentiometer clockwise until the yellow LED is fully lit. Slowly ad-

just the potentiometer back until the LED just goes out. Adjustment is then complete. 40 Warnings, Cautions and Notices CHAPTER 5 Chapter 5: Warnings, Cautions and Notices This chapter provides the Warnings, Cautions and Notices that are relevant to the S251B reader. Topic Page 5.1 FCC/PTT Regulations ................................................................................42 5.2 Important note to Purchasers/Users of the S251B Reader in the U.S.A.42 5.3 WARNING....................................................................................................42 41 S2510 Reader - Reference Guide 5.1 FCC/PTT Regulations April 00 The TIRIS Reader RF produces emissions at 134.2 kHz. The radiation of the funda-

mental and the harmonics will vary with the type of antenna and other devices or functions connected to the Reader. Prior to operating the S251B Reader together with antenna(s) and power supply, the required FCC, PTT or relevant government agency approvals must be ob-

tained.Sale, lease or operation in some countries may be subject to prior approval by the government or other organizations. 5.2 Important note to Purchasers/Users of the S251B Reader in the U.S.A. The TIRIS Reader is considered by the Federal Communications Commission (FCC) to be a "subassembly". As such, no prior approval is required to import, sell or other-

wise market the Reader in the United States. In order to form a functioning radio fre-

quency (RF) device, the Reader must be connected to a suitable antenna and power supply. A radio frequency device may not be operated unless authorized by the FCC nor may a radio frequency device be marketed (i.e. sold, leased, imported, or adver-

tised for sale or lease) without the prior grant of an FCC equipment authorization. FCC authorization to operate an RF device may take one of two forms: first, the FCC may grant the user an experimental license; second, the FCC may issue an equip-

ment authorization permitting use of the RF device on an unlicensed basis. TI can assist the user in obtaining an experimental license that will cover a specific installa-

tion of the S251B Reader in a specific site or sites. Experimental authorizations are appropriate to cover operations during the development of an RF device. A grant of equipment authorization (known as "certification") must be obtained from the FCC before RF devices are marketed or operated on a non development basis. DEVICES CONSTRUCTED FOR EVALUATION INCORPORATING THIS Reader SHOULD BE OPERATED ONLY UNDER AN EXPERIMENTAL LICENSE ISSUED BY THE FCC AND MAY NOT BE MARKETED. BEFORE ANY DEVICE CONTAIN-

ING THIS Reader IS MARKETED, AN EQUIPMENT AUTHORIZATION FOR THE DEVICE MUST BE OBTAINED FROM THE FCC. Prospective marketers of devices containing this Reader are responsible for obtain-

ing the necessary equipment authorization. Upon request TI can provide assistance in obtaining FCC approval to market devices incorporating this Reader. 5.3 WARNING Care must be taken when handling the S251B. High voltage across the antenna ter-

minals could be harmful to your health. If the antenna insulation is damaged the an-

tenna should not be connected to the Reader. 42