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ST950 Plus+ User Manual
ST950 Plus+ User Manual
Page 64 of 176
667/HE/53000/000
Issue 2
Unrestricted
3.16.12
CIC/CTB Interfaces: Relay A and Relay B and Consolidated Relay
Relay A and Relay B are signals from the ST950 CPU that in normal operation are asserted (pulled
low). If the ST950 detects a major fault it may de-assert either Relay A or Relay B or both Relays.
The first CIC/CTB in the system connects to the ST950 Relay A and Relay B via a 6- way Molex
connector PL5. Detail for this connection is as follows:
Table 10 : CIC/CTB Relay Interface
The first CIC/CTB in the system consolidates the Relay A and Relay B signals into a single
Consolidated Relay signal. This signal is passed on to each subsequent CIC/CTB in the system via
the
‘CON RLY OUT’
and
‘CON RLY IN’ RJ45 connections.
If the ST950 de-asserts either Relay A or Relay B;
all
CICs in the system will open their Power-bank
Relays and hence remove the +48V DC supply from all nodes in the system.
3.16.13
CIC/CTB Addressing
A single BCD address switch which is situated for easy access at the front of the CIC and visible
when mounted to the CTB, provides a configurable address for the CIC for the purposes of GSPI
and SPB addressing.
A system including adjacent cabinet may have up to 6 CIC cards with associated addresses. Three
CICs in each cabinet.
The address selected by the BCD address switch is offset by 10. This is to ensure that there is no
conflict with other GSPI or SPB (Serial Phase Bus) devices.
The Address switch position on each CIC needs to be uniquely set as follows:
•
0 = not used
•
1 = CIC 1
•
2 = CIC 2
•
3 = CIC 3
•
4 = CIC 4
•
5 = CIC 5
•
6 = CIC 6
•
7 or above = not used
Pin
Legend
Function
1
ST950 RLY A
ST950 Relay A
2
ST950 RLY B
ST950 Relay B
3
RLY GND
No Connection
4
NC
No Connection
5
+24V DC
+24V to power the ST950
6
GND
0V to power the ST950