Continental Automotive 5WK49127 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

User Manual

of the

Siemens VDO

Remote Control System

Type:

5WK4 9125
5WK4 9126
5WK4 9127
5WK4 9128

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Siemens VDO Automotive AG SV C BC P2 RF

IC: 267T-5WK49127 FCC ID:KR55WK49127

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%

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