Continental Automotive 5WK49123 User Manual

Siemens VDO Automotive AG SV C BC P2 RF TG

IC: 267T-5WK49123 FCC ID:KR55WK
______________________________________________________________

User Manual / Functional Description

of the

Siemens VDO

Radio Frequency Transmitter

type 5WK4 9123

File: S:\Postzula\BMW\PL2_Sender\Func_5WK49123.doc Page 1 of 3

Siemens VDO Automotive AG SV C BC P2 RF TG

IC: 267T-5WK49123 FCC ID:KR55WK
______________________________________________________________

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 Akku (VL 2020) that gives a tension
of feeding 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.

File: S:\Postzula\BMW\PL2_Sender\Func_5WK49123.doc Page 2 of 3