Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 74 of 118
This document is uncontrolled when printed.
6. Installation
6.1 Circuit Design considerations
6.1.1 General
A front (make, or pick) contact of each relay function which is readily
available at the hut is to be provided as an input to the Level Crossing
Monitor.
If there is no spare front contacts for a particular relay then a back
(break, or drop) contact may be used instead. When a back contact is
used then the expression data must be altered to allow for the use of
a back contact.
Additional buried cables to adjacent signalling locations are not
normally cost justifiable to provide the normal or additional inputs into
the Level Crossing Monitor.
It is not desirable to use of the Level Crossing B12 or B15 supply for
inputs outside the Level Crossing Hut. This may however be accepted
on a case by case basis.
Standard circuit sheet X15 details the types of inputs to be provided to
the Level Crossing Monitor and their preferred input numbers. It
includes all the inputs for a double line crossing with signals.
Inputs 1 to 8 should always be used for their nominated purpose and
if the input is not available then it should be left spare.
Inputs 9 to 12 should be used for any readily available Signals,
Ground Frames, or Points etc so that their operation may be logged.
Inputs 13 to 23 should always be used for their nominated purpose
and if the input is not available then it should be left spare.
Inputs 24 to 31 may be used for any purpose. The inputs detailed are
a suggestion only. It is normal for Country Level Crossings to have the
DSPR on input 28, DSJR on input 29, DSJPR on input 30.
When applying Standard circuit sheet X15 to a particular Level
Crossing the designer must check:
When applying Standard circuit sheet X24 to a particular Level
Crossing the designer must check is their is a NO Charge relay
provided with the Store 74. If their is then use example 1 otherwise
use example 2.
When applying Standard circuit sheet X26 to a particular Level
Crossing the designer must check what model Store 74 Battery
charger is fitted at the Level Crossing. Sheet X26 gives example
designs for both types of Store 74 in use.