Optex Fiber SenSys Terrain Defender TD 100 Installation Manual page 16

Figure 10. TD100 inside optional TD Outdoor Enclosure
Each lead-in cable connects to the sensor cable inside the SUMA, a waterproof enclosure. The
SUMAs are installed "in-line" with the sensor cables. The connections inside the enclosures are
made utilizing a Start-Up Module (SUM). The SUM uses spring-loaded lever-action terminal
blocks to make the power and sensor connections, then an SMA bulkhead for the lead-in
connection.
Lightning protection circuitry is provided at the SUM. The ground connection is made from the
SUM's stainless steel enclosures ground lug then routed to a ground rod or plate installed
midway between the sensor cables and SUMAs.
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