Unitronics IO-D16A3-RO16 Installation Manual page 3

Wiring Analog Inputs
The following diagram shows the 2-wire and 4-wire current connection.
Use shielded twisted pair cable.
Connect shields to the earth ground at the signal's source.
Connecting RG Pins
For correct operation of digital and analog inputs and for EMI immunity, connect the RG pin of all the expansion modules
containing RG signals to the adapter module 0V signal.
The overall length of the wire connecting the RG pins to the adapter 0V signal must be less than 3 meters.
Connect the RG pins in series (daisy chain). To facilitate this, use both the RG pins.
Wiring Outputs
The following diagram shows the output connectors with pin numbers and corresponding LED numbers.
Note: Where output numbers are stated, the intention is the LED number.
Wiring the Output Power Supply
A non-isolated power supply can be used provided that the 0V signal is connected to the earth ground.
Do not connect the neutral or line signal of the 110/220VAC to the device's 0V pin.
In the event of voltage fluctuations or non-conformity to voltage power supply specifications, connect the device to a regulated
power supply.
Wiring Relay Outputs
Outputs 0–7 share the common signal C0 and outputs 8-15 share the common signal C1.
Relay Outputs 0-7
Unitronics IO-D16A3-RO16
Relay Outputs 8-15
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