WRM-4
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ms elektronik
2. Operation overview
The turnout detector WRM-4 can be used both in analogue model railway layouts and in
digital layouts (together with digital solenoid decoders).
The WRM-4 detects the position of the drives of turnouts and signals with double coil drives
without limit switching. As the position of the anchor in the coil is analysed, the detector also
reacts if turnouts are shifted manually. In particular cases the actual position of the turnout
can differ from the position of the drive, e.g. when there are interferences of the tongue´s
movement due to parts of railway ballast.
Each detector can detect the position of four drives of turnouts or signals. Each of the four
functional areas has two outputs for the connection of LEDs or lamps (not included in the
package), displaying the actual position.
The outputs of the WRM-4 switch against earth. Thus digital feedback modules (e.g. s88
modules) or subordinated circuits (e.g. for automatic train control) can be connected to the
outputs (in addition to or instead of lamps or LEDs).
6 | Operation overview