Fuses; Heart Of The Controller - Siemens ST950 Handbook

Link Functions
PL18 - Enable Remote Reboot
This link must be in place to enable the remote reboot function. If the user does not
wish this function to be available the link should be removed.
PL17 - RTC Backup capacitors - This link should always be in place.
Switch Functions
S1 – Level 3 push button – used to gain level 3 access on the controller.
S2 – Program push button used to invoke the programming sequence to update
firmware and/or controller configuration. This button is only active when the lamps
are switched off.
S3 – Enable Fail Flash switch. To make use of this feature the controller is required
to be configured correctly.
S4 – Reset EFC push button. This push button is reserved for engineering use and
should NOT be pressed.
4.6

Fuses

There are a number of user replaceable fuses present on the board that provide
protection where power supplies from the system leave the board to power the
users equipment.
F1 – Handset – 500mA Quick blow
F2 – Aux RS232 Modem power supply output – 500mA Quick blow
The replacement fuse for F1 and F2 is Siemens part number 518/4/97070/004. This
part number calls up the holder and fuse. Remove the fuse and discard the holder.
4.7

Heart of the Controller

The heart of the Controller uses an SD card to provide transferable storage for
controller firmware, configurations and logs.
Should it need to be removed or replaced the following procedure should be
followed:
Power down the controller.
Unplug connectors and slide the CPU card free of the rack so that the top edge of
the card can be accessed.
Security classification
Version
Last Editor
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Copyright © Siemens plc 2020. All Rights Reserved.
When replacing a fuse it is important to fit the correct type for continued
protection of the ST950 CPU Card and users equipment.
The formatting of the card is such that it is not readable in a PC. There
are no user files accessible on the card.
Unrestricted
7
manpreet.jeerh
ST950 ICM Handbook
Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
47 of 154
Issued
January 2020
667/HE/45950/000