Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 15 of 118
This document is uncontrolled when printed.
Code reported by Control Centre PC Level Crossing Monitor, Status
Codes
Code 1 LAMP
Code 2 LOGIC
Code 3 SYSTEM
Code 4 BATTERY
Code 5 TEST
Code 6 COMMUNICATIONS FAIL
Code 7 SECURITY ALARM
Code 8 EMERGENCY SWITCHES
Code 9 No Train for 72 hours
Code 10 No Test for 36 hours
Code 11 Operating Too long
TRAIN DRAGGING EQUIPMENT DRAGGING EQUIPMENT
Note 1: Security Alarm is intended to be an alarm module installed at
the level crossing. In the future a number of level crossing locations
may have alarms fitted which can then report back via the level
crossing monitor to the Control Centre.
Note 2: Train Dragging equipment is intended to be an alarm that is
activated by Train Dragging detector equipment. It is a future option.
2.5 Digital Inputs
The Level Crossing monitor has 48 digital inputs that are logged and
8 digital inputs that are not logged. Digital inputs are conditioned
through a 12 volt 32 way Input Optoisolator board. They are suitable
for input voltages in the range of 9 volts to 20 volts DC. They require
a positive voltage for each individual input and a common negative
for the Input Optoisolator board.
The following digital inputs are normally connected to the Level
Crossing monitor when available at the particular Level Crossing:
 All track circuits that qualify the operation of the level crossing.
 Direction stick relays.
 The level crossing control and repeat relays.
 Test switch.
 Boom 85-90 degree state.
 Lights, Bell and Boom emergency switches.
 AC supply state.
 Low battery voltage indication from charger.