Product Info

HELLA GmbH & Co. KGaA
59552 Lippstadt
FS125C
Date:
2018-09-10
Processed:
O. Kushova E-B-D2-HW
A. Rebello HIA-E-ED-HW1
Page 3 of 4
This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
1 Device description
This document is to describe the FS125C family of Radio Identification Devices (RID) intended for use in automotive Passive
Entry / Passive Start systems. All family members use the same PCB layout and basic type of housing. Images of the devices
are given below.
Device designation
Buttons
Button functions
Customer lab
FS125C
4
Lock, Trunk, Panic, Unlock
VW
2 FS125C functions overview
All devices share the same printed circuit board (PCB). They allow the user to control the central locking system
and other functions of a vehicle from a distance. Functionality can be divided into active mode functions and
passive mode functions. Both are described in the following chapters.
3 Application
The above-mentioned devices are intended to allow the user to comfortably control the central locking status of a
vehicle. This can be achieved by activation of the buttons described in the following picture. Furthermore, comfort
to the user is enhanced to a great extent by passive entry and passive start functionality.
4 FS125C pictures
The following images show the exterior view of the FS125C devices. End caps of the housing may be either
made of plastic or metal. These pictures are exemplary, other designs e.g. with less buttons or different button
labels or different customer label or different design of the end cap may exist.
Picture 1: FS125C top (plastic cap) Picture 2: FS125C back (plastic cap)