Replacement Of Hpu; Replacement Of Lpu; Replacement Of Cpu Card - Siemens ST950 Handbook

edge of the frame. Having done this there is room to reach the back of the cards to
deal with the ribbon cables.
The cards are held in the rack by retaining strips at the front, which must be moved
clear after first loosening the strip clamping screws.
Exercise care when withdrawing cards so as not to damage the ribbon cables as
they pass across the rear edge of the rack.
I/O cards are located on the back panel of the controller. The swing frame should
be swung out of the way first, then the I/O card(s) can be reached.
Intelligent Detector Backplane cards are fitted to the rear of the separate 3U
detector rack.

10.3.4 Replacement of HPU

When an HPU card needs to be replaced, remove the HPU card, metal brackets
and heat transfer pad. Handle the heat transfer pad with care, as it can be damaged
by sharp blows. Fit the new heat transfer pad to the side panel, as shown on
667/GA/33040/ETC. Align the HPU and metal brackets to the panel, and screw the
brackets to the panel, gradually compressing the heat transfer pad.

10.3.5 Replacement of LPU

The LPU is removed by unscrewing the 4 retaining screws at the front of the LPU
and pulling the LPU forward. The replacement LPU is fitted in the reverse order,
taking care to align the LPU into the card guides when inserting,

10.3.6 Replacement of CPU Card

In case of failure, the CPU Card should be replaced. The Licence card and Heart of
the controller (SD card) should be moved to the new card to preserve the junction
configuration and facilities.
When replacing a CPU card it is possible to clone the system running on the CPU
card being replaced onto the new CPU card using the Heart of the Controller. The
steps to perform this are described in this section.
Security classification
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Last Editor
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Copyright © Siemens plc 2020. All Rights Reserved.
See the Safety Information on pages 2-4 before proceeding.
Only replace a CPU card with a compatible variant:
•
667/1/46010/001 can be replaced with either 667/1/46010/001
or 667/1/46010/101
•
667/1/46010/101 must only be replaced with 667/1/46010/101
Ensure the before re-connecting the Ethernet connector that the new
CPU card has the IP configuration set correctly. Failure to do this may
result in network disruption that can affect other network devices.
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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
123 of 154
Issued
January 2020
667/HE/45950/000