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6/03
IO-AI4-AO2 I/O Expansion M odule
Unitronics Industrial Automation
5
I/O Wiring—General
Input or output cables should not be run through the same multi-core cable or share the same wire.
Allow for voltage drop and noise interference with input lines used over an extended distance. Use wire
that is properly sized for the load.
The adapter, I/O signals, and module’s power supply must be connected to the same
0V signal.
The COM signals of each I/O are internally connected to the module’s 0V.
Analog Inputs
Shields should be connected at the signal source.
Inputs may be wired to work with either current or voltage.
OUT OF RANGE
SHORT CIRCUIT
IO-AI4-AO2
AI
AO
POWER
+V 0V
I
V
COM
AO0
I
V
COM
AO 1
I
V
COM
AI3
I
V
COM
AI2
I
V
COM
AI1
I
V
COM
AI0
Circuit protection device
0V
+V
Power
supply
Voltage
connection
Current
connection
LOAD
-
LOAD
+
-
+
+
-
+
-
2 wire
connection
Voltage
Input
Current
transmitter
Current
transmitter
3 wire
connection
Current
transmitter
Power
supply
4 wire
connection
-
+