107062-12 EN FR26 GLO 501 Printed in France 67
Emitter and Receiver Module Assemblies
Two module assemblies are located inside each emitter and receiver unit; the power supply module and the
optical controller module (see figure 4-4)
Figure 4-4 Emitter and Receiver Module Assemblies
The power supply module in the receiver unit has three mechanically linked relays. The power supply module
in the emitter unit has no relays. A fuse is located on the power supply module of the emitter and receiver.
The optical controller module has a master module that controls the LEDs in the emitter unit and the
photoreceivers in the receiver unit. Some units may have one or more optical extension modules connected
to the master module (and any other extension modules) via a flat ribbon cable.
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