Siemens VDO Automotive AG SV C ER User Manual / Functional Description of the Siemens VDO TX Transmitter type 5WY 8201-2-3-4-5-6 File: S:\Postzula\Dwmc\Func_TX_Dwmc.doc Page 1 of 4 Siemens VDO Automotive AG SV C ER General description of the RF transmitter The RF remote control system consists of a RF transmitter and a RF receiver mounted within the control unit. The RF transmitter is mechanically integrated in the head of the key. This transmitter is used to transmit an information for locking or unlocking the vehicle by an unidirectional RF transmission line for normal remote operation by pressing a button. In general the following functions are provided:
- Lock the car
- Unlock the car
- Unlock trunk Power supply The transmitter is provided with 1 Lithium battery (CR 1616) that gives a tension of feeding of +3V. The battery inversion is protected mechanically. Buttons There are two buttons which enable to lock, unlock the doors and unlock the trunk. During activation, the button is forced to the ground via a pull-up within the microcontroller. LED The LED is turned on between transmission blocks. Variants Siemens type designation frequency difference 5WY 8201 5WY 8202 5WY 8203 5WY 8204 5WY 8205 5WY 8206 315 MHz 315 MHz 315 MHz 433 MHz 433 MHz 433 MHz without transponder with transponder-master with transponder-non master without transponder without transponder with transponder-non master All variants have the same schematic, pcb and layout. The only difference is the transponder usage. File: S:\Postzula\Dwmc\Func_TX_Dwmc.doc Page 2 of 4 Siemens VDO Automotive AG Typical usage pattern SV C ER 30 lock / unlock operations in 24 hours with a typical transmission duration of 270 milliseconds 1.25 lock / unlock operations / hour Transmitter ON 0.3375 seconds / hour Transmitter OFF 3,599.6625 seconds / hour Duty Cycle: TON / T (ON+OFF) x 100% = 0.3375 / 3,600 x 100 % = 0,009 %
Block diagram of the transmitter Buttons Power C/Transponder LED RF stage Antenna Technical Data:
Carrier frequency:
Carrier frequency Output power/field strength:
Type of modulation:
Method of frequency generation:
Number of channels:
Power supply:
Type of battery:
Transmission range:
0.05%
0.05%
315 MHz 433 MHz
< 10 mW ASK SAW 1 battery (CR 1616) lithium
< 6 m File: S:\Postzula\Dwmc\Func_TX_Dwmc.doc Page 3 of 4 Siemens VDO Automotive AG SV C ER Label design Europe: (433.92 MHz) 5WY 8203-4-5 USA / Canada: (315 MHz) 5WY 8201-2-3 FCC ID:KR55WY8201-2-3 CAN: 267 xxx xxxx This device complies with part 15 of the FCC Rules. 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. File: S:\Postzula\Dwmc\Func_TX_Dwmc.doc Page 4 of 4