Figure 6. Wiring Diagram For Thermistor Input; Figure 7. Wiring Diagram For Counter Or Digital Input - Andover Controls SCX 920 Installation Manual

Hardware Installation
The inputs are on the lower left side of the SCX 920. Input wires should
enter from that side. Notice that the inputs are labeled RET, 1, 2, RET,
3, 4, and so on. The first return terminal goes to the first two inputs, the
second to the next two inputs, and so on.
Figure 6 shows a thermistor attached to an input point. One lead
connects to the numbered input terminal, the other to a return terminal.

Figure 6. Wiring Diagram for Thermistor Input

Follow these steps:
1. Slip the first wire for the first sensor under the input point screw for
2. Slip the first wire for the second sensor under the input point screw
3. Slip the ground wires from both the first and second sensors under
4. Repeat the steps 1 through 3 for each pair of inputs.
Figure 7 shows a counter wired to an input point.

Figure 7. Wiring Diagram for Counter or Digital Input

SCX 920 Installation Guide
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input 1 and tighten the screw down on it.
for input 2 and tighten the screw down on it.
the RETURN screw above input point 1 and tighten the screw down
on them.
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1 (input point 1)
RET (return)
1 (input point 1)
RET (return)
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