Siemens ST950 Handbook page 21

3.2.1 Rack Wiring
The ST950 Export Rack wiring information is described below:
Mains supply wiring:
Colour
Brown
Blue
Green/Yellow Rack Earth
Aux Supplies:
Security classification
Version
Last Editor
Document Name
Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
Mains Supply Filtering for Export Rack Configurations
The ST950 export rack is supplied without a mains input filter or
Lightning Protection. We strongly recommend that a mains filter and/or
Lightning Protection components are fitted to ensure maximum
immunity to mains borne interference. This is especially important in
areas that suffer with poor mains quality or frequent thunderstorms.
Siemens offer several kits to suit particular controller configurations:
667/1/46965/000 – Filter kit for ST950 or 40A ST950ELV controller
422/4/09906/010 – Filter for 20A ST950ELV controllers
667/1/27118/000 – Mains Surge Arrestor Kit for either LV or ELV
controllers
667/1/45972/001 – Ethernet Lightning protection kit
Function
2 wires – Live Supply Input from controller master switch
2 wires – Neutral Supply Input
Regulator Sign Live
Unrestricted
5
Neil Atkinson
ST950 ICM Handbook
Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Neutral Return
Page 21 of 125
Status Issued
Date 18-Dec-2018
Document No. 667/HE/46950/000