Siemens ST950 - Intelligent Detector Backplane Card

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
53 of 154
Version
7
Status
Issued
Last Editor
manpreet.jeerh
Date
January 2020
Document Name
ST950 ICM Handbook
Document No.
667/HE/45950/000
Copyright © Siemens plc 2020. All Rights Reserved. Mobility is a division of Siemens Plc
11
N.C.
Input 11
12
N.C.
Input 12
13
Output 3 Common
Input 13
14
Connected to Pin 13
Input 14
15
Output 3 Normally Open
Input 15
16
Output 3 Normally Closed
Input 16
17
N.C.
Input 17
18
N.C.
Input 18
19
Output 4 Common
Input 19
20
Connected to Pin 19
Input 20
21
Output 4 Normally Open
Input 21
22
Output 4 Normally Closed
Input 22
23
N.C.
Input 23
24
N.C.
Input 24
25
0V
0V
26
0V
0V
Table 7 - CPU IO Card Connector Pin Out
4.11 Intelligent Detector Backplane Card
The Intelligent Detector Backplane provides an interface for up to 4 loop detector
cards, each loop detector card connecting to 4 loops.
The Intelligent Detector Backplane connects to the CPU Card or previous Intelligent
Detector Backplane via the GSPI interface serial cable through which the card also
obtains its power supply.
The Loop Detector supply is cabled separately as shown in Figure 23. This supply
is normally -24V DC from the HPU, but can be provided from a separate
transformer.
A twisted ribbon cable provides the connection between the loop detector cards and
the road loops, via the loop termination card. The /950 variant also includes
additional connectors to allow the SLD4 loop detector auto-configuration
communications link to be wired between multiple backplanes within a controller.