EMB-Z2531PA-USB EMB-Z2531PA-USB Datasheet FCC ID: Z7H-EMBZ2531PAUSB The device complies with part 15 of the FCC Rules. Operation is subjected to the following 2 conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. Document information Versions & Revisions Version 1.0 Date 05/09/11 Author Comments Augusto Sala Preliminary version References Ref Version Date Author Title FCC ID: Z7H-EMBZ2531PAUSB Brand: Embit Model: EMB-Z2531PA-USB/xx; EMB-Z2531/xx; EMB-Z2531PA/xx; EMB-Z2531USB/xx; EMB-Z2531-
USB/xx; EMB-Z2531PAUSB/xx; NETCE001/xx (just different commercial type names)
/xx stands from EUT with integral antenna or EUT with antenna connector Power supply: 4 to 6 VDC Transmission frequency: 2405 2480 MHz Other certifications: CE The device complies with part 15 of the FCC Rules. Operation is subjected to the following 2 conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help. The device complies with the FCC's Rf exposure requirements for USB dongles. Sar complance for body-worn operation is based on a separationdistance of 0.5 cm between the unit and the body of the user. End-user must be informed of the body-worn operating requirements for satisfying RF exposure compliance. The highest report SAR value is : 0.99 W/kg Index 1 Description...................................................................................2 1.1 Specifications............................................................................................2 1.2 Applications...............................................................................................2 1.3 Block diagram............................................................................................3 1.4 Microcontroller...........................................................................................3 1.5 Antenna.....................................................................................................3 1.5.1PIFA antenna radiation diagrams..........................................................................4 1.5.2Antenna selection (PIFA/external)........................................................................ 6 1.6 Power Amplifier / Low Noise Amplifier.......................................................6 1.7 Firmware....................................................................................................7 1.7.1 Power Amplifier interface..................................................................................... 7 1.7.2 Switches and LEDs.............................................................................................. 7 1.7.3 USB pull-up.......................................................................................................... 7 1.8 Developing tools........................................................................................7 2 Mechanical data............................................................................8 2.1 Size............................................................................................................8 2.2 Antenna positioning...................................................................................8 2.3 Notes.........................................................................................................8 3 On board devices..........................................................................9 4 Electrical characteristics...............................................................9 4.1 Absolute Maximum Ratings.......................................................................9 4.2 Operating Conditions.................................................................................9 4.3 Power Consumption...................................................................................9 4.4 RF Characteristic.......................................................................................9 4.5 Limitations...............................................................................................10 5 Compliance: Introduction.............................................................11 6 Compliance: Important information..............................................11 7 Compliance: CE specific...............................................................13 7.1 Output power...........................................................................................13 8 Compliance: FCC specific.............................................................13 8.1 FCC Data..................................................................................................13 8.2 Output power...........................................................................................14 8.3 802.15.4 channel 26................................................................................14 21 febbraio 2012 1 Description 1 Description EMB-Z2531PA-USB is a USB dongle developed by embit for LR-WPAN applications. The solution is a modified version of the EMB-Z2530PA module that include a USB capable microcontroller, some on board hardware and connectors. The simplified design combines high performance to small dimensions and low cost, providing the system integrator a simple and easy way to add IEEE 802.15.4 / ZigBee low range wireless connectivity and multi-hop networking into existing products. EMB-Z2531PA-USB is configured as an embedded micro system or simple data modem for low power applications in the 2.4 GHz ISM band. It is based on a Texas Instruments TM CC2531 single chip device which is an 8051 8 bit controller with 256 kbyte Flash memory and 8 kbyte of RAM. The device includes a USB transceiver, an hardware accelerator for the MAC IEEE802.15.4 and a 2.4 Ghz transceiver. The ad-hoc RF section includes a power amplifier and a low noise amplifier which guarantee best-inclass performance in terms of covered area and power consumption. The output power can be increased up to +20 dBm by simple software configurations and the sensitivity is configurable between two options, allowing to cover distances up to 500 meters (LoS); the U.FL receptacle allows the connection of an external antenna. EMB-Z2531PA-USB include two LEDs and a switch on board, the USB connector and a programmer connector. The power supply conditioning chain is integrated on the dongle. 1.1 Specifications 8 bit 8051 MCU 256K Flash, 8K RAM Output power: up to +20 dBm (100 mW) Sensitivity: up to -105 dBm (high sensitivity mode) PCB antenna (PIFA), wire connector and uFL receptacle for external antennas Coverage: up to 500 meters (LoS) Unique IEEE address (64 bit) on-board USB 2.0 certified full speed transceiver (12 Mbps) USB type A connectors Embit programming interface 2 LEDs and 1 switch 1.2 Applications Metering: thermostat, meters, remote devices, displays, etc.. Home/Buildings Automation: safety systems and access control, HVAC, door/window control, lightning, etc.. Industrial Automation: process control, wireless sensor networks, identification and asset tracking, etc.. Healthcare: blood pressure monitoring, thermometers, ECG, etc.. 2 21 febbraio 2012 Description 1.3 Block diagram Image 1: block diagram for the EMB-Z2531PA-USB 1.4 Microcontroller CC2531 is an integrated Texas InstrumentsTM platform for IEEE 802.15.4/ZigBee. The device intregrates a low power 2.4 GHz transceiver, a CPU based on a 8051 core (8 bit) with hardware accelerator for the IEEE 802.15.4 MAC and a USB transceiver. The CC2531 can be used for different wireless applications, starting from the simple point to point proprietary protocol to ZigBee mesh networks, and has been developed to offer high computational power with low consumption. The 8051 8 bit core works at 32 MHz; there are 256 kbyte of flash memory and 8 kbyte of RAM memory. 1.5 Antenna The EMB-Z2531PA-USB offers three different antenna options:
PIFA antenna directly printed on the PCB with an omnidirectional emission diagram (xz plane). The performances of this antenna are influenced by the positioning of the USB dongle in the system (see paragraph Antenna positioning). The antenna specifications are provided in next paragraph (images might refer to the EMB-Z2530PA module that shares with the EMB-Z2531PA-USB all the RF section). Wire antenna: hole for soldering a wire antenna. 21 febbraio 2012 3 Description External antenna connector (optional): 50 Ohm single ended U.FL connector. 1.5.1 PIFA antenna radiation diagrams The printed antenna of the EMB-Z2531PA-USB is a simple and performant solution for a 2,4 Ghz system. It has a maximum gain of +1,5 dBi, positioned in the xy plane
(see 3D radiation diagram). Here is the 3D radiation pattern:
Image 2: 3D radiation pattern 4 21 febbraio 2012 Description Polar radiation pattern:
Image 3: polar radiation pattern, xy plane Image 4: polar radiation pattern, yz plane Image 5: polar radiation pattern, xz plane 21 febbraio 2012 5 Description 1.5.2 Antenna selection (PIFA/external) To select the antenna option the last 0402 resistor (zero R) or capacitor (10 pF) in the RF chain (the one closer to the printed antenna) must be rotated from vertical to horizontal position and viceversa. If the PIFA antenna is desired, the component must be installed in vertical position, as shown in the following picture:
Image 6: C3 capacitor installation for PIFA antenna If an external antenna is to be used, either through U.FL connector or wire soldering point, the C3 capacitor must be installed in horizontal position, as shown in the following picture:
Image 7: C3 capacitor installation for external antenna 1.6 Power Amplifier / Low Noise Amplifier The EMB-Z2531PA-USB is equipped with a PA / LNA combination to increase the communication range of the device. The PA provides a fixed gain of +20 dBm and the LNA can provide a gain of +11 dBm or +1 dBm selectable from the MCU. To switch between low gain and high gain the MCU must drive the pin 0 of port R low (high gain) or high (low gain). 6 21 febbraio 2012 Description 1.7 Firmware The EMB-Z2531PA-USB is compatible with the TIMAC stack and Z-Stack provided by Texas Instruments. Some modifications must be done to drive the external PA and LNA and the USB pull-up. For an insight guide, please consult the appropriate documents. 1.7.1 Power Amplifier interface The EMB-Z2531PA-USB has an integrated power amplifier and low noise amplifier that must be controlled by the transceiver. Depending on the stack some modifications might be required in order to control the front-end. The interface between transceiver and front-end is composed of an SPI port and three GPIO pins: Enable, PA_enable and Low/High_Sensitivity. The Enable pin (for controlling the LNA) is remapped from P1.4 to P1.0 when comparing to Texas Instruments Evaluation Modules and so the right settings for OBSSEL0:
OBSSEL0 = RFC_OBS_CTRL1;
// OBSSEL4 = RFC_OBS_CTRL1;
1.7.2 Switches and LEDs The EMB-Z2531PA-USB have 2 leds and a switch mapped as the EMB-Z2530PA module. Some remapping of the LED and switch pins is therefore required if starting from the Texas Instruments stacks. For further information please consult the appropriate documents. The pinout is as follows:
LED1 Connected to VDD LED2 Connected to P2.0 (lit when P2.0 is set high) SW1 Connected P0.6 (ground signal when pressed) 1.7.3 USB pull-up The EMB-Z2531PA-USB have the USB pullup remapped from P1.0 to P1.3. 1.8 Developing tools For programming the EMB-Z2531PA-USB any emulator provided by Texas Instruments might be used (CC Debugger, SmartRF, etc.). The IAR IDE is suggested for working with the stacks. 21 febbraio 2012 7 Mechanical data 2 Mechanical data 2.1 Size The mechanical dimensions of the EMB-Z2531PA-USB are 60,40 x 22,60 mm. The thickness is 7,0 mm, CAN Shield, USB connector and programming interface included. Image 8: Outline 2.2 Antenna positioning Some care must be taken when positioning the antenna inside a host system. If using the integrated PIFA antenna, the side of the PCB on which the antenna is located must be positioned away from metal parts of the case or other PCBs. 2.3 Notes Keep antenna clear of metal parts of the casing or system. Don't use metal enclosures to avoid RF signal degradation. 8 21 febbraio 2012 On board devices 3 On board devices Two LEDs are located on the USB dongle. One is connected to VDD and the second one can be controlled by the microcontroller using the P2.0 pin. One switch is also mounted on the pin P0.6. The embit programming interface can be used to program the microcontroller. Please read the appropriate document for more details. 4 Electrical characteristics 4.1 Absolute Maximum Ratings Power Supply Voltage Voltage on any pin (beside USB pins) RF input power (PMAX) Storage Temp. Range Value 6 3,6 10
-45 ~ +125 4.2 Operating Conditions Parameter Power Supply Voltage (Vcc) Input Frequency Operating Temperature Range Typ Min 4 2405
-40 Max 6 2480 85 4.3 Power Consumption Unit Vdc Vdc dBm C Unit Vdc MHz C Typ. value Mode Transmit Receive Sleep The consumption doesn't count the power needed for the LEDs
** 1.1 A can be obtained in power mode 2 with sleep timer running (LEDs are excluded). Unit mA mA A Up to 1.1**
135*
28*
21 febbraio 2012 9 Electrical characteristics 4.4 RF Characteristic Parameter RF Frequency Range RF Data Rate Nominal Output Power Programmable Output Power Range Receiver Sensitivity (1% PER) Normal mode Receiver Sensitivity (1% PER) High sensitivity mode Saturation (IP3) Maximum Input Level Min 2400
-5
-2 4.5 Limitations Typ 250
+10
-94
-105 Max 2483,5
+20
Unit MHz Kbps dBm dBm dBm dBm dBm Every operation involving a modification on the internal components of the device will void the warranty. 10 21 febbraio 2012 Compliance: Introduction 5 Compliance: Introduction The purpose of this chapter is to describe which behaviour the user MUST have in order to operate the device under compliance with current regulations. The details described here are then to be read carefully and applied literally. The EMB-Z2531PA-USB is certified for CE and FCC compliance. The different regulations have different limitations and impose different approaches to the device that will be discussed in different chapters. Any aspect that both the regulations have in common will be described in an appropriate chapter in order to keep readability of this document at maximum. The main aspect that the user MUST consider is the output power. The device itself is compliant and ready to be used but care must be taken in setting an appropriate output power when programming the devices. The device can output up to 20 dBm of conducted power which translates into up to 21.5 dBm of eirp with the integrated antenna or more if using an external antenna. Please follow the directives in this document to set the appropriate output power for the antenna you are using. Any other antenna that is not covered in the certification must not be used unless a new certification is performed. 6 Compliance: Important information The device is to be used in accordance with the current guide. The antennas used must be one of those indicated by the manufacturer and the output power must be set as required by the present document. There is no duty cycle limit for this device if the appropriate power settings are respected. Any modification on the device will void the certification. The device can only be used with the antennas specified in the following table and the power setting must not exceed those indicated in this table for each antenna and operative area (CE or FCC). For correctly operate the devices with the stack provided please set the output power according to the following table. The Maximum tx power column refers to the power to be set in the stack and might differ slightly from the effective output power (see power tables). If the device is using the integrated antenna, please consider the settings specified for the EMB-AN24-
15PFA antenna. Antenna code Antenna type EMB-AN24-
14YA EMB-AN24-
12YA EMB-AN24-
20HWDU EMB-AN24-
00QWS Yagi Yagi 12 wave dipole captive mount 1/4 wave stubby Antenna gain
+14,0 dBi Maximum tx power
(for CE)
+1 dBm EIRP
(for CE) Maximum tx power
(for FCC) EIRP
(for FCC) 15,0 dBm +20 dBm 34,0 dBm
+12,0 dBi
+2 dBm 14,0 dBm +20 dBm 32,0 dBm
+2 dBi
+12 dBm +14,0 dbm +20 dBm +22,0 dbm
+0 dBi
+14 dBm +14,0 dbm +20 dBm +20,0 dbm 21 febbraio 2012 11 Compliance: Important information Antenna code EMB-AN24-
21DBA EMB-AN24-
50FPCBA EMB-AN24-
25FPCBABD EMB-AN24-
25FPCBA EMB-AN24-
15FPCBA EMB-AN24-
22MA EMB-AN24-
15MA EMB-AN24-
40SMA EMB-AN24-
20SMA EMB-AN24-
70pA EMB-AN24-
50pA EMB-AN24-
50SA EMB-AN24-
40pA EMB-AN24-
15PFA EMB-AN24-
55RDD EMB-AN24-
50RDD EMB-AN24-
22WMA EMB-AN24-
10PA EMB-AN24-
12CA Antenna type Antenna gain Dual band antenna
+2,1 dBi EIRP Maximum tx power
(for CE)
+12 dBm +14,1 dbm +20 dBm +22,1 dbm Maximum tx power
(for FCC)
(for FCC)
(for CE) EIRP Flexible PCB antenna
+5 dBi
+9 dBm +14,0 dbm +20 dBm +25,0 dbm Flexible PCB antenna
+2,5 dBi
+12 dBm +14,5 dbm +20 dBm +22,5 dbm Flexible PCB antenna
+2,5 dBi
+12 dBm +14,5 dbm +20 dBm +22,5 dbm Flexible PCB antenna
+1,5 dBi
+13 dBm +14,5 dbm +20 dBm +21,5 dbm Mini antenna
+2,2 dBi
+12 dBm +14,2 dbm +20 dBm +22,2 dbm Mini antenna
+1,5 dBi
+13 dBm +14,5 dbm +20 dBm +21,5 dbm Multi frequency antenna
+4 dBi
+11 dBm +15,0 dbm +20 dBm +24,0 dbm Multi frequency antenna
+2 dBi
+11 dBm +15,0 dbm +20 dBm +22,0 dbm Portable swievel antennas panel Portable swievel antennas panel Portable swievel antennas panel Portable swievel antennas panel
+7 dBi
+7 dBm +14,0 dbm +20 dBm +27,0 dbm
+5 dBi
+9 dBm +14,0 dbm +20 dBm +25,0 dbm
+5 dBi
+9 dBm +14,0 dbm +20 dBm +25,0 dbm
+4 dBi
+11 dBm +15,0 dbm +20 dBm +24,0 dbm Printed PCB antenna pifa
+1,5 dBi
+11 dBm +12,5 dbm +20 dBm +21,5 dbm Rubber duck dipole antenna
+5,5 dBi
+9 dBm +14,5 dbm +20 dBm +25,5 dbm Rubber duck dipole antenna
+5 dBi
+9 dBm +14,0 dbm +20 dBm +25,0 dbm Wall mount antenna
+2,2 dBi
+12 dBm +14,2 dbm +20 dBm +22,2 dbm Patch antenna
+10 dBi
+5 dBm +15,0 dBm +20 dBm +30,0 dBm Corner antenna
+12 dBi
+2 dBm +14,0 dBm +20 dBm +32,0 dBm 12 21 febbraio 2012 Compliance: CE specific 7 Compliance: CE specific This chapter will introduce those aspects that the European regulation mandates. 7.1 Output power The CE regulation allows for up to 20 dBm of EIRP output power but imposes a maximum power spectral density of +10 mW/Mhz. Considering the bandwidth of the 802.15.4 and ZigBee, this translates into a reduction of the maximum usable output power. Also spurious emission regulations might impose a lower output power. Consider the antennas table from previous chapter for setting the right output power. 8 Compliance: FCC specific This chapter will introduce and discuss the aspects related the FCC certification. 8.1 FCC Data FCC ID: Z7H-EMBZ2531PAUSB Brand: Embit Model: EMB-Z2531PA-USB/xx; EMB-Z2531/xx; EMB-Z2531PA/xx; EMB-Z2531USB/xx; EMB-Z2531-
USB/xx; EMB-Z2531PAUSB/xx; NETCE001/xx (just different commercial type names)
/xx stands from EUT with integral antenna or EUT with antenna connector Power supply: 4 to 6 VDC Transmission frequency: 2405 2480 MHz Other certifications: CE The device complies with part 15 of the FCC Rules. Operation is subjected to the following 2 conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help. 21 febbraio 2012 13 Compliance: FCC specific This equipment is approved only for mobile and base station transmitting devices, separation distances of (i) 20 centimeters or more for antennas with gains < 6 dBi or (ii) 2 meters or more for antennas with gains 6 dBi should be maintained between the antenna of this device and nearby persons during operation. To ensure compliance, operation at distances closer than this is not recommended. 8.2 Output power The FCC regulation allows for up to 30 dB or output power plus up to 6 dBi of assembly gain which translates into up to +36 dBm of EIRP. The EMB-Z2531PA-USB can output up to
+20 dBm and so, when using the allowed antennas, will have no problems with the output power limit. Spurious emission and spectral density doesn't limit the output power neither on the EMB-Z2531PA-USB and so every output power setting can be used. 8.3 802.15.4 channel 26 When using the channel 26 of the 802.15.4 frequency band special care must be taken. The FCC regulations impose a spectral power mask with a falling edge too close in frequency to the channel 26. To keep compliance with FCC regulation, avoid using channel 26, lower the output power by 10 dBm or use a duty cycle lower than 33 %. 14 21 febbraio 2012