Connecting The Track Busy Indicator; Pin Assignment; Connections - tams elektronik GBM-1 Manual

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4. Connecting the track busy indicator

There are terminal strips soldered to the module which are used to insert and screw on the
connecting cables.

4.1. Pin assignment

GBM-1 Connection to
E1 to E4
Isolated conductors of the monitored rail sections
A1 to A4 Downstream accessories or digital feedback modules
+ Return conductors of the downstream accessories
^ ^ - rail not monitored
^ - or "" connection of the transformer supplying the GBM-1
^ - connection of th driving transformer / booster
Notice: Internally, the two ground connections of the GBM-1 ^ are connected to each other, you can
use them according to your needs.
~ ~ - or "+"- connection of the transformer supplying the GBM-1

4.2. Connections

Isolation of the conductors
The busy status can only be reported trouble free, when with each monitored section one
conductor is isolated at both ends:

With centre conductor systems: both rails. When cutting the middle conductor instead of
the two rails, it is impossible to connect digital feedback modules directly to the outputs A1
to A4.

With 2-rail systems: one of the two rails.
Connecting the track busy indicator| 15
GBM-1