Optex Fiber SenSys Terrain Defender TD 100 Installation Manual page 58

Once all wiring is complete, the unit should be tested before attempting to power the sensor and
TD100 processor. Turn off the DP4 ON/OFF switch and confirm field DC cable ends are taped
over, capped, or inserted into the relevant SUM. Testing points for the TD24PSU are the
terminal screws which can be measured by making contact with the multimeter probe tips.
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