Continental Automotive Technologies 5WK49147 Key User Manual
Continental Automotive GmbH Key
User Manual
Annex No.5
Technical Description
Key: 5WK4 9147
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49147 FCC ID:KR55WK49147
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User Manual
of the
Siemens VDO
Remote Control System
Type:
5WK4 9145
5WK4 9146
5WK4 9147
5WK4 9148
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49147 FCC ID:KR55WK49147
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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 the trunk of the car
Power supply
The transmitter is provided with 1 Lithium battery (CR 2032) 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-5WK49147 FCC ID:KR55WK49147
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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-5WK49147 FCC ID:KR55WK49147
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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-5WK49147 FCC ID:KR55WK49147
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Variants
Model Description
5WK4 9145 868.4MHz variant for Europe
5WK4 9146 434.2MHz variant for Europe
5WK4 9147 315MHz variant for USA
5WK4 9148 315MHz variant reduced power for Japan
Technical Data
Carrier frequency model 5WK4 9145: 868.4 MHz ± 0.05%
Carrier frequency model 5WK4 9146: 434.2 MHz ± 0.05%
Carrier frequency model 5WK4 9147: 315.0 MHz ± 0.05%
Carrier frequency model 5WK4 9148: 315 MHz ± 0.05%
Output power model 5KW4 9145/6/7: < 10 mW
Field strength model 5WK49148: < 500µV/m @ 3m
Type of modulation model 5KW4 9145/6/7: FSK
Type of modulation model 5KW4 9148: ASK
Method of frequency generation: PLL
Number of channels: 1
Power supply: battery (CR2032)
- Nominal voltage: 3 V
- Lowest voltage: 2, 1 V
- Highest voltage: 3, 3 V
Type of battery: lithium
Transmission range: <10 m
Type of RF-antenna: Loop antenna
Length of RF-antenna: 30, 35 mm
Siemens VDO Automotive AG SV C BC P2 RF
IC: 267T-5WK49147 FCC ID:KR55WK49147
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Label design
Europe: (434 MHz) Europe: (868 MHz)
Siemens VDO Siemens VDO
5WK4 9146 5WK4 9145
Japan: (315 MHz)
Siemens VDO
5WK4 9148
USA/CAN: (315 MHz)
Siemens VDO
5WK49147
IC: 267T-5WK49147
FCC ID:KR55WK49147
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.