Siemens ST950 Handbook page 32

Detector +ve Supply
Detector -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 Purpose
/Plug
SK1 Reg. Signs
SK2 Detector Supply
SK2 Solar Cell
PL1 & Relay Control
PL2
PL3 Reg. Sign
Monitor
Security classification Unrestricted
Version 7
Last Editor manpreet.jeerh
Document Name ST950 ICM Handbook
Copyright © Siemens plc 2020. All Rights Reserved.
Sopers Lane, Poole, Dorset, BH17 7ER
Solar Signal Solar +ve Supply
Description
-48V DC Connection for 8 off Reg. Signs
Reg Sign Return (+)
Reg-Sign 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 (-)
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.
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.
Reg. Sign current monitor output to LSLS card.
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
Mobility, Intelligent Traffic Systems
Solar -ve Supply
32 of 154
Issued
January 2020
667/HE/45950/000