Continental Automotive 5WK49127 Key User Manual
Continental Automotive GmbH Key
User Manual
Annex No.5
Technical Description
Key: 5WK4 9127
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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User Manual
of the
Siemens VDO
Remote Control System
Type:
5WK4 9125
5WK4 9126
5WK4 9127
5WK4 9128
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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General description of the RF transmitter PL2 TX
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 the trunk of the car
Power supply
The transmitter is provided with 1 Lithium accumulator (VL 2020) that gives a
power supply of +3V.
Buttons
There are three buttons which enable to lock and unlock the doors and to
unlock the trunk.
During activation, the button is forced to the ground via a “pull-up” within the
microcontroller.
Typical usage pattern (for Europe only)
10 lock/unlock operations in 24 hours with typical transmission duration of 2 seconds
→ 0,42 lock/unlock operations with one hour
Transmitter ON 0.84 seconds / hour
Transmitter OFF 3599.16 seconds / hour
Duty Cycle: TON / T (ON+OFF) x 100% = 0.84 / 3,600 x 100 % = 0.02%
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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Block diagrams of the transmitter
Button's PLL Transmitter
IC
9,84375 MHz
Crystal
125 kHz
LF Circuit
(L/C)
315 MHz
Loop Antenna
µC for LF communication /
RF - transmittion
Power Supply
2,2 to 3,3 V
µC reference frequency
616,54kHz
Tx, RF data
4,807 kBit/sec
315 MHz
Button's PLL Transmitter
IC
13,5687 MHz
Crystal
125 kHz
LF Circuit
(L/C)
µC for LF communication /
RF - transmittion
Power Supply
2,2 to 3,3 V
µC reference frequency
847,5kHz
Tx, RF data
5,3 kBit/sec
434,2
MHz
434 MHz
Loop Antenna
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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Button's PLL Transmitter
IC
13,5687 MHz
Crystal
125 kHz
LF Circuit
(L/C)
µC for LF communication /
RF - transmittion
Power Supply
2,2 to 3,3 V
µC reference frequency
847,5kHz
Tx, RF data
5,3 kBit/sec
868,4
MHz
868,4 MHz
Loop Antenna
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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Variants
Model Description
5WK4 9125 868.4MHz variant for Europe
5WK4 9126 434.2MHz variant for Europe
5WK4 9127 315MHz variant for USA
5WK4 9128 315MHz variant reduced power for Japan
Technical Data
Carrier frequency model 5WK4 9125: 868.4 MHz ± 0.05%
Carrier frequency model 5WK4 9126: 434.2 MHz ± 0.05%
Carrier frequency model 5WK4 9127: 315.0 MHz ± 0.05%
Carrier frequency model 5WK4 9128: 315 MHz ± 0.05%
Output power model 5KW4 9125/6/7: < 10 mW
Field strength model 5WK49128: < 500µV/m @ 3m
Type of modulation model 5KW4 9125/6/7: FSK
Type of modulation model 5KW4 9128: ASK
Method of frequency generation: PLL
Number of channels: 1
Power supply: accumulator (VL 2020)
- Nominal voltage: 3 V
- Lowest voltage: 2, 1 V
- Highest voltage: 3, 3 V
Type of accumulator: lithium
Transmission range: <10 m
Type of RF-antenna: Loop antenna
Length of RF-antenna: 34 mm
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49127 FCC ID:KR55WK49127
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Label design
Europe: (434 MHz) Europe: (868 MHz)
Siemens VDO Siemens VDO
5WK4 9126 5WK4 9125
Japan: (315 MHz)
Siemens VDO
5WK4 9128
USA/CAN: (315 MHz)
Siemens VDO
5WK49127
IC: 267T-5WK49127
FCC ID:KR55WK49127
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.