Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 56 of 118
This document is uncontrolled when printed.
4. Systems Maintenance Program
4.1 Maintenance Tasks
4.1.1 Corrective Maintenance
Fault finding and fault rectification is discussed in section 5 on Fault
Diagnosis and the Operation and Functional Checks for each
module in section 3.
4.1.2 Preventative Maintenance
Preventative maintenance is recommended once every 12 months
and should consist of the following:
 Observe the front LEDs for correct state and operation.
 Check cables and wiring is intact and secure.
 Check each module is physically okay and is not suffering from
heat damage.
 Listen to the phone line for noise.
 Inspect a 48 hour period of the log for any anomalies
 Check the accuracy of measured Battery voltage is within limits.
 Check the 5 volt supply when measured on the 8 way Output
Optoisolator test pins is between 4.8 and 5.1 volts.
4.1.3 EPROM Replacement or Configuration Data Change
If the EPROM which contains the software is to be replaced or if
new Configuration Data is to be uploaded then a copy of the log
must be taken before change is implemented. This is because the
new EPROM or Configuration Data may cause the log to be
unretrievable.
The EPROM is fitted in IC site U5 on the SCADA 2000 I/O Board.
The power must be turned off before an EPROM is removed or
installed.
If the main box is marked Version 1.0:
1. Remove the top cover by undoing the screws around the edge
using a Number 1 Posidrive screwdriver.
2. Location the EPROM IC site which is labelled U5. It is at the
front of I/O Board, a third of the way in from the left when looking
down from the front of the main box.
3. The ADC board may have to be removed by undoing the phillips
screw and lifting it up.