St950 System Components; Mains Distribution Unit - Siemens ST950 Handbook

4 ST950 S
YSTEM
This section introduces the main components of the ST950 system.
4.1

Mains Distribution Unit

The MDU is not used to power the Loop Detector cards.
MDU ConnectionsFigure 5 shows the rear of the MDU and details the connections
on the connectors.
PL1 z
32 EARTH
IN
28 LIVE
INPUT
24 NEUTRAL
INPUT
20 SOLAR
SUPPLY
16 SPARE N/C
14 ZXO-N N/C
12 0V
10 0V 5V(CPU)
8 12V 24V
6 P/FAIL 5V(ESB)
4 REL-B REL-DIM
2 REL-A LSupp+
PL2 z
32 DIM
COMMON
28 NEUTRAL
RETURNS
24 NEUTRAL
RETURNS
20 NEUTRAL
RETURNS
16 DIM-LIVE
(240V)
12 R/A
SUPPLY
8 GREEN
SUPPLY
4 50-0-50V
SUPPLY
Security classification
Version
Last Editor
Document Name
Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
C
OMPONENTS
d
LIVE
INPUT
NEUTRAL
INPUT
REG.
SIGN.
SPARE
ZXO-L
0V 0V
5V(CPU)
SSR
5V(ESB)
24V(CPU) 4
LSupp-
b d
NEUTRAL
RETURNS
NEUTRAL
RETURNS
NEUTRAL
RETURNS
DIM-LIVE
(240V)
DIM-LIVE
(160V)
R/A
SUPPLY
GREEN
SUPPLY
Figure 5 – MDU Connections & Rack View
Unrestricted
5
Neil Atkinson
ST950 ICM Handbook
Sopers Lane, Poole, Dorset, BH17 7ER
30
26
22
16
14
12
10
8
6
2
30
26
22
18
14
10
6
Page
Status
Date
Document No.
Intelligent Traffic Systems
24 of 125
Issued
18-Dec-2018
667/HE/46950/000