User manual

3
Module inputs can be activated by closing to the common point
(GND). The 1A and 1B inputs receive signals from the first track,
the 2A and 2B inputs from the second one.
In case the EXT_IN input is activated, the signal immediately
changes to red. This input (with the RED-OUT output of the
previous module) enables the monitoring of more than two parallel
tracks. See the wiring diagram.
Outputs
The light barrier is connected to the RED and WHITE outputs. If
LEDs are being used, serial current limiting resistors are required.
See the wiring diagram.
The RED_OUT output activates when the red signal of the module
is active. This output can be used to create a chain structure when
more than two tracks must be monitored simultaneously.
This output can also be used in Car system for operating the stop-
magnet placed in front of the railroad crossing.
The lifting barrier is connected to the BARRIER_OUT output. The
module operates the barrier with a delay when locking and
releasing.
On the +V output the rectified positive voltage is present (appr. 16
- 20 V DC). This is a common point of the light signal and the
lifting barrier.
Installation
If a sensor on the first track is activated after wiring the circuit, the
signal has to change to red and can only be released by another
sensor on the same track.
If no release occurs, the correct wiring should be checked.
Eventually the sensors of the two tracks have been interchanged!