Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 21 of 118
This document is uncontrolled when printed.
Led 4 (red) on the SCADA 2000A I/O board should be flashing once
every 0.25 seconds, Led 3 (red) may be on or off, and Led 14 (red)
should be on. All other LEDs should be off.
The SCADA 2000 A I/O Boards front panel LEDs have the following
meaning:
LED1: Normally off, Flashing or permanently ON means a
Board Error on start-up or to many resets in the last 5
minutes.
LED2: Normally on, means board successfully passed start-up
tests
LED3: On when a command is being processed either locally or
remotely.
LED4: Normally flashing, means that logging and monitoring is
occurring.
LED5: Should be off, flashes for when a character is received
on a serial port
LED6: Should be off, flashes for each Carrier Detect change on
a serial port
LED7-13: Should be Off, Means that Bits 1 to 56 are configured
as inputs.
LED14:Should be On, Means that Bits 57 to 64 are configured
as outputs.
The Level Crossing monitor is comprised of the following
components.
 Main Box
 Current sensors
 Vital Indication Optoisolators(VIO)
 Input Optoisolator
 Output Optoisolator
 Cables
 Interface relays
 Battery test load resistor
 Modem
Telephone line surge protection unit
 Telephone line