Routine Maintenance Procedures; Routine Inspection Of Signal Equipment; Routine Inspection Of Pedestrian Signal And Demand Equipment; Routine Inspection And Electrical Testing Of Controller - Siemens ST950 Plus+ User Manual

ST950 Plus+ User Manual
R M
OUTINE
8
This section contains a list of checks that must be performed at an ST950 Plus
regular basis (normally annually).
These instructions override any others that may exist. If a Site PI exists for the specific site, it may
contain instructions that should be carried out in addition to those detailed below.
Controller Cabinet Power During Maintenance
All power to the controller must be disconnected before any attempt is made to remove the internal
components of the controller cabinet. The only exception would be when replacing a 48VDC PSU, which
has redundancy and therefore allows for hot-swap.

Routine Inspection of Signal Equipment

• Check all signal heads/aspects for damage and take any necessary corrective action.
• Check all signal heads for correct alignment with their respective approaches.
• Check all pole top cable connections; ensure that they are sound, secure and not seriously
corroded.
• Check that all top caps are fitted and are not damaged.
• Check that all poles are secure in the ground and are not leaning or damaged.

Routine Inspection of Pedestrian Signal and Demand Equipment

• Check all pedestrian signalling and demand units for damage and take any necessary
corrective action.
• Open the pedestrian equipment and inspect no excessive pollution and for secure wiring
and insulation.

Routine Inspection and Electrical Testing of Controller

It is suggested that these procedures be performed in the order listed.
Examine the outer case for serious damage. The outer case would normally only be replaced if it
has been damaged to the extent that its security has been breached or that water or dirt is
entering.
Open the main door and the Manual Panel door, check that the screw-locks, lock and hinges
operate freely. Inspect the door and lock and check the lock and catch-plate for security. Replace
or tighten as necessary. Lubricate as necessary with good quality penetrating type oil.
ST950 Plus+ User Manual
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AINTENANCE ROCEDURES
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