User's Manual

Wireless Matrix SDT-5000 Installation and User Guide
Doc. 020-331-0002v1.1 14/31
Connecting the Cable to the SDT-5000
The SDT-5000 does not ship with a connector cable. This section describes instructions for cable
selection, assembly and mating to the SDT-5000.
Cable Selection
The cable connecting the SDT-5000 junction box to an RTU should have stranded wires,
separately insulated, with an overall sheath around it sufficiently durable to withstand
environmental and mechanical conditions.
It is recommended that shielded cable be used. This reduces signal leakage to/from the cable and
improves noise immunity.
Signal lines should use 20 AWG stranded wire. Power and ground (power return) lines should use
14 AWG stranded wire.
The cable and the conduit shall be constructed of materials that are Class 1, Div. 2 compliant.
Cable Assembly
The cable connects to the junction box by individual wires being connected to terminal blocks
inside the junction box. This end of the cable requires some insulation trimming and tinning of wire
strands.
Each wire connecting to the junction box should have its insulation trimmed back by exactly ¼”.
After the insulation has been trimmed, each wire should be tinned.
The cable shield should be attached to the power ground or the chassis ground.
Mating the Cable to the Junction Box
When cable wires are connected to the junction box they are inserted into the rounded oval holes
of the terminal blocks, as shown in figure 3.