ST950S Plus+ Installation and Commissioning Manual
Figure 28. IDB Loop Power Connections
3.14.4. Parts
Intelligent Detector Backplane - 667/1/32910/950
24V PSU to IDB Wiring Loom - 667/1/53047/000
3.15. CIC Card and CTB (Backplane)
3.15.1. Overview
The CIC is the Plus
+
communications hub and provides controller power distribution for the remote
nodes, via the street wiring. Its main role is to provide safe communications to remote nodes such as
RAG, Wait and Nearside nodes in order to control the traffic signalling. It provides the facility to disable
the 48V power supply to selected nodes in the event of safety events.
The CIC, fitted to its associated CTB, is situated within the controller cabinet in a similar fashion to
how the ST950 ELV controller mounts its LSLS assemblies and are typically mounted on the side walls
of the controller. In order to maintain consistency of mounting arrangements the size of the CIC is
constrained to 6U and the CTB retains the same footprint as the LSLS backplane.
The CTB is a passive backplane used for the termination of various signals including 48V Power, on
street cabling (including power and communications), ST950 (power and communications), and control
for ancillary equipment.
A
SPB / GSPI / Relay Status In
B
SPB / GSPI / Relay Status Out
C
CPU Status LED (LP1A and LP2A)
D
CIC Comms Status LEDs (LP3A and
LP3B)
E
CIC Address Selector
Street wiring is terminated directly to the CTB via cage clamp terminal blocks. The CTB in turn routes
its connected signals to the CIC via DIN standard connectors.
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