Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 11 of 118
This document is uncontrolled when printed.
 No remote or local test of the level crossing has occurred within the last
36 hours.
 The local test was not valid as it was not conducted for the 2 minute
minimum period.
 No train has traversed the level crossing within the last 72 hours.
 The Emergency switches have been turned off for more than 10
minutes.
 There has been a failure of some signalling equipment near the level
crossing which has caused a Interlocking failure. eg. points detection
failure, signal lamps out or track failure.
A status indication of WARNING & LAMP is indicated if:
 One of the lamps is not working.
 A status indication of WARNING & BATTERY is indicated if:
 The AC Supply has been OFF for more than 6 hours 30 minutes.
 A status indication of WARNING & SYS_FAULT is indicated if:
 The Level Crossing Monitor itself has a internal fault. A possible
internal fault could be due to failure of the A/D card, real time clock,
CPU, memory, log data or EPROM.
A status indication of FAULT & LOGIC is indicated if the level crossing
has:
 not started operating 6 seconds after the time that it should start
operating.
 not stopped operating 6 seconds after it should have stopped
operating.
 not had a change of state on the flasher inputs within the last 5
seconds when the level crossing should be operating.
 operated continuously for more than 20 minutes.
 remote battery testing output on without a test being requested or the
test runs for more than 5 minutes and 30 seconds.
 the Boom normal when it should not be, or not normal when it should
be normal.
 either direction stick is up and their is no train detected.
 Battery Test relay is faulty
A status indication of FAULT & LAMP is indicated if:
 Two or more of the lamps are not working.