Step 1; Step 2; Step 3 - Optex Fiber SenSys Terrain Defender TD 100 Installation Manual

Step 2

Engage the AC fuse holder and then the circuit breaker. AC fuse holder should not be
illuminated. Fuse holder illumination indicates a blown fuse.
Verify DC power LED is illuminated.

Step 3

Ensure field DC cable ends are taped over, capped, or inserted into the relevant SUM.
Engage the DC fuse holders, then measure and verify the DC voltage is 48 VDC by
measuring the user input points.
Figure 79. DC power testing points (red arrow), fuse holder blocks are positive; others are negative
Lastly, if applicable, measure the DC cable ends or verify TD100 power.
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