Specifications

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RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

and Warning conditions must be cleared before cancelling this mode otherwise they will

be reported to the Control Centre.

Note that the maintenance disable feature is a part of the expression file and can be

disabled if required by modifying the expression file.

1.7.3 Codes reported to Control Centre

The level crossing monitor will report a Fault or Warning and one of the following codes

when it detects a change in the status of the crossing. These directly relate to the monitor

front panel indications discussed previously. But also include some additional information

by identifying some indications that are grouped on the front panel.

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.

1.8 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.

• Manual operating switch.

• Boom 85-90 degree state.

• Lights, Bell, Boom and Gates emergency switches.

• AC supply state.