Annex No.5 Technical Description Key 5WK4 9046 Siemens VDO Automotive AG SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Remote Control Transmitter User Manual of the Siemens VDO Type:
Designkey I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 1 of 7 Siemens VDO Automotive AG SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 General description of the Designkey "Keyless Go"
The Designkey incorporates two main functional features. 1. RF remote control system : activation by button press 2. Keyless go system : activation by an external LF-signal source. In both activation modes the Designkey answers with the available RF (radio frequency) interface. For remote control function additionally IR (infra red) communication is in use. In regular application the RF receiver is located within the control unit which is mounted in the car interior. The Designkey RF transmitter antenna is mechanically integrated in the key head. The RF transmitter is used to transmit different information by a unidirectional transmission line to the RF receiver within the control unit. In regular application the following functions are provided by the Designkey :
- Lock the car
- Unlock the car
- Unlock the trunk of the car
- Driver authentication ( Keyless Go )
- Panic activation ( USA only ) Power supply The transmitter is provided with 2 Lithium batteries (CR 2025) that both gives a power supply of +3V. Buttons There are three buttons which enable to lock and unlock the doors and to unlock the trunk and an extra button in case of required panic function (USA only). During activation, by button press the microcontroller port is forced to ground via a pull-up within the microcontroller. I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 2 of 7 Siemens VDO Automotive AG SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Typical usage pattern (for Europe only) 96 lock/unlock operations in 24 hours with typical transmission duration of 0.8 seconds 4 lock/unlock operations with one hour 3.2 3,596.8 seconds / hour seconds / hour Transmitter ON Transmitter OFF Duty Cycle: TON / T (ON+OFF) x 100% = 3.2 / 3,600 x 100 % = 0.08 %
I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 3 of 7 SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Power management Siemens VDO Automotive AG Battery B Battery A Block diagrams of the transmitter LF communication Button's C for button and Keyless Go -
Control Unit standard C interface C for RF Tx and IR RxTx data transmission IR- Transmitter IR - Receiver Manchester coded RF transmitter LED Crystal 9,84375 MHz Crystal for 315,0 MHz 13,5687 MHz Crystal for 433.92 MHz I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 4 of 7 Siemens VDO Automotive AG SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Description 433.92 MHz variant for Europe 315.00 MHz variant for USA Variants Model 5WK4 9045 5WK4 9046 Technical Data Carrier frequency model 5WK4 9045:
Carrier frequency model 5WK4 9046:
Output power model 5KW49045 :
Field strength model 5WK49046 :
Type of modulation:
Method of frequency generation:
Number of channels:
Power supply:
Type of battery:
Transmission range:
NOTE:
Changes or modifications not expressly approved by the manufacturer could void the users authority to operate the equipment. 433.92 MHz 0.05%
315.00 MHz 0.05%
< 10 mW
< 6000V/m @ 3m FSK PLL 1 battery (2x CR 2025) lithium
<10 m I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 5 of 7 SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Siemens VDO Automotive AG Label design Europe: (433.92 MHz) Siemens VDO 5WK4 9045 Siemens VDO 5WK4 9046 IC: 267T-5WK4 9046 FCC ID: KR55WK49046 USA/CAN: (315 MHz) This device complies with part 15 of the FCC Rules and RSS-210. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept interference received, including interference that may cause undesired operation. I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 6 of 7 Siemens VDO Automotive AG SV C BC P2 RF TG IC: 267T-5WK49046 FCC ID:KR55WK49046 Homologation functionality For homologation use the Designkey samples are programmed with a special software which allows to set the RF transmission in following modes :
1 ) Constant carrier high frequency 2 ) Constant carrier low frequency 3 ) 1 kBit Modulation 4 ) 10 kBit Modulation The following diagram shows how to activate the different homologation modes. Modulated 10 kbit/s
(LED Blink 50ms) Constant HIGH FREQ.
(LED Blink 200ms) any button panic button close button trunk button any button OFF trunk or open or panic button close button open button close or panic or trunk button Modulated 1kbit/s
(LED Blink 20ms) open button Constant LOW FREQ.
(LED Blink 200ms) I:\POSTZULA\MB_DC\DesignKey\Original_Doku\Func_Designkey.doc Page 7 of 7