Installation guide

Mobility and Logistics, Traffic Solutions

Sopers Lane, Poole, Dorset, BH17 7ER

Security classification Unrestricted Page 28 of 84

Version 1 Status Issued

Last Editor Carl Rabe Date 11-Dec-2014

Document Name Stratos Outstation General and ICM Handbook Document No. 667/HB/52250/000

4.6 The PSU Board

The PSU board provides power for the system and provides application specific hardware

modules to support specific functions. This board acts as a GSPI device to allow the CPU

board to communicate with it.

The main functions of the PSU Board are:

 Logic rail power supplies

 Basic 8 input + 2 output TR2523 I/O

 Mains monitoring and Zero Cross Over timer (ZXO)

 Lamp Supply voltage monitoring (ELV & LV)

 Backup battery control – charging, health, safety

Figure 6 – PSU Board

Figure 7 – PSU Board Layout

Note: This board is shown with the 'front' on the right as it is mounted back to back with

the CPU board.

Batt. Fuse

24V I/O Fuse