Installation guide

7 Wiring Equipment to the I/O Module

Use a maximum wire size of 18AWG for wiring inputs and outputs. A 22AWG wire is the

recommended size for inputs.

If you must run analog signal wiring a long distance or through areas with electrical interference, use

shielded wire. The shield should be connected to ground only at the panel end.

Wiring analog and digital inputs

You can wire analog and digital inputs to the following DataNab modules:

• Ai8_R13

• AiO8

• Ai32

Use analog inputs to monitor temperature, amps, or voltage. Typical analog sensors include

thermistor based temperature sensors. The ENV system is capable of handling either a 10K Type II

or a 10K Type III industry standard thermistor.

Use digital inputs to monitor status or alarms, such as damper position or a water sensor. Traditional

digital inputs are either a dry contact or open collector transistor from a device.

To wire inputs:

1. Be sure the I/O module power is off before wiring any inputs.

2. Connect analog input wiring as follows: