Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 64 of 118
This document is uncontrolled when printed.
Some facilities are protected by PIN numbers. These are: Engineering
Mode access PIN number
Remote Control Centre connection PIN number
4.2 Tools and Maintenance
A number 1 posidrive screwdriver is required to remove the lid of the
main box.
A 2.5 mm flat blade screwdriver is required to remove individual wires
from the connectors used on most modules in the system.
A multimeter is required for most fault finding.
A portable PC with a copy of the program LX_MAINT.exe is required.
A suitable 9 pin female to 9 pin female null modem serial cable with
possibly a 25 pin to 9 pin converter if required for the PC. Note that the
level crossing monitor end of the cable needs a moulded plug with
loopback for CD to DTR and RTS to CTS.
Null Modem cable connections
D9 Female (PC) D9 Female (LXMON)
2 RX 3 TX
3 TX 2 RX
5 SG
5 SG
1 CD
Back)
4 DTR (loop
1 CD
Back)
4 DTR (loop
7 RTS
Back)
8 CTS (loop
7 RTS
Back)
8 CTS (loop
The D9 Female connector at the level crossing monitor end requires a
moulded (flush fitting) connector if it is used with a V1.0 monitor. This is
due to the recessed serial ports used on the V1.0 monitor. The new V3.0
level crossing monitor does not have recessed serial ports and can use
D9 connectors with any type of backshell.
A 28 pin IC extractor for removing EPROMs.
4.3 Maintenance Instructions
Prior to conducting routine maintenance of the Level Crossing
Signalling equipment the Fault Reset button on the Monitor should be
pushed and held for 5 seconds. This places the level crossing monitor in
maintenance disable mode. The LOGIC indication should be flashing
once per second which indicates that the monitor has had its reporting
of status changes disabled temporarily.
When in this state the monitor will not report changes of status to the
Control Centre. It is cancelled by a momentary push of the Fault