Siemens ST950 - Regulatory Signs Monitoring

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
33 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
PL4,
PL6,
PL7
LSLS Lamp and
Logic supplies
Lamp and logic supply connections to LSLS1, LSLS2,
and LSLS3 cards.
PL5
Transformer
Low Power
Detector, Reg. Sign, and 3 off LSLS logic supplies.
SK3
Transformer
High Power and
Earth
Bright, Dim, and Common connections from
transformer. Earth connection to earth all supplies on
HPU card.
Table 3 – HPU Connections
4.2.1 Regulatory Signs Monitoring
The HPU is equipped with a Regulatory Signs supply as standard (SK1 on the HPU
as shown in Figure 12 above). The supply can be monitored for up to eight
regulatory signs. If the junction contains more than eight signs in total then a
Regulatory Signs Supply and Monitoring kit is needed. This allows a further 12
regulatory signs to be powered and monitored.
Reg Sign Returns (Gnd)
Reg Sign Supply (-48V)
Figure 15 – Regulatory Signs Supply connections
The HPU (and LSLS Card 1 through PL3) are fitted with the circuitry to monitor the
regulatory signs. No external torroids are required in order to monitor the regulatory
signs. If a second HPU is fitted, this can supply and monitor up to eight more
regulatory signs; connect PL3 of HPU2 to the first Reg Sign input on SK5 of the
LSLS Card connected to PL4 of HPU2 (i.e. the first LSLS connected to HPU2).
LSLS card connections are described in section 4.13.