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minimize nuisance alarms. The maintenance and/or test log should include the date,
name(s) of the test personnel, inspection criteria, pass/fail assessment for output relays,
and pass/fail assessment for simulated intrusions.
Other optional data that can be recorded are the weather at the testing time, the number of
days in operation, uptime for each TD100, and the threshold for each sensor cable at the
testing time.
Troubleshooting
Cut/Broken Sensor Cable:
A cut or broken sensor cable may be discovered during the visual inspection, installation, or
need to be located as a result of a cable fault alarm. In any case, the break needs to be
found and excavated for repair. If notified via a cable fault alarm, the location would be
visible by a persistent alarm location in the WUI alarm log or threshold. There can be no
more than two cable splices per any length of sensor cable.
Disconnect power from the damaged Terrain Defender Sensing Cable (TDSC). This can be
done by turning off all associated TD24PSU or TD48PSU using the respective DP4 or
circuit breaker, ON/OFF switch, or by disconnecting the ends of the power lead-in cable.
WARNING: Using a multimeter, test the cable ends to be repaired to verify the circuit is
not energized before handling and continuing with the repair process.
Using a TDSC Repair Kit, center the back half of the enclosure under the cable break.
Placing a tarp or other material to stop dirt from interfering with the build and trap any tools
or parts that inadvertently drop is helpful.
Feed the cable ends through the enclosure grommets center hole. Next, prep the cable by
stripping 60 mm (2.36 in) of both jackets and dielectric foam, exposing the center conductor
and braided drain wire. Cut the center conductor back 30 mm (1.18 in). This would leave
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Figure 83. Cable Splice Assembly
Confidential – Limited Distribution
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Troubleshooting
