Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 44 of 118
This document is uncontrolled when printed.
If the Outputs are permanently ON then
Check the LED on the suspect circuit
board. If the LEDs are extinguished check:
Replace Output Opto board
If the LEDs on the suspect circuits are lit
check: I/O Cable connection
Replace Output Opto Board
Replace Main Box
Check cable for damage
3.6.6.1 Testing a Single Output
Determine the expected state of the output. Compare the expected
state with the state of the LED in the Output Opto Board for the
suspect circuit.