Siemens ST950 - Page 32

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
32 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
Detector +ve Supply Solar Signal Solar +ve Supply
Detector -ve Supply Solar -ve Supply
Figure 14 – SK2 Detector Supply and Solar Cell connections
See section 4.17 and Figure 39 for details of the cable connections to the Solar
Cell.
The following table details the connections on the HPU.
Socket
/Plug
Purpose
Description
SK1
Reg. Signs
-48V DC Connection for 8 off Reg. Signs
Reg Sign Return (+)
Reg-Sign Supply (-)
SK2
Detector Supply
-24V DC supply for powering Loop Detector Cards and
above ground detectors. Connects to a 12-way terminal
block on the side panel of the cabinet. Det Com (+) and
Det Sup (-)
SK2
Solar Cell
Connection for 24V DC Solar Cell
Connect Solar cell supply leads to Solar + and Solar -,
observing correct polarity. Connect Solar Cell signal to
Sol Sig.
PL1 &
PL2
Relay Control
Connection to CPU Card and LPU for relay control.
PL1 and PL2 are identical. PL2 connects to Main CPU
Card. PL1 connects to PL2 of second HPU unit, if fitted.
PL3
Reg. Sign
Monitor
Reg. Sign current monitor output to LSLS card.