1 1 / 0 0
IO-AI4-AO2
I / O E x p a n s i o n M o d u l e
Unitronics Industrial Automation Systems
5
Input Wiring
Shields should be connected at the signal source.
Inputs may be wired to work with either current or voltage.
Current
transmitter
OUT OF RANGE
SHORT CIRCUIT
IO-AI4-AO2
AI
AO
24 VDC
+V 0V
I
V
COM
AO 0
I
V
COM
AO 1
I
V
COM
AI3
I
V
COM
AI2
I
V
COM
AI1
I
V
COM
AI0
4 wire
connection
Circuit protection device
0V
+V
Power
supply
Voltage
connection
Current
connection
LOAD
-
LOAD
+
Power
supply
Current
transmitter
2 wire
connection
3 wire
connection
-
+
+
-
Voltage
Input
+
-
Current
transmitter
Output Wiring
Shields should be earthed, connected to the earth of the cabinet.
Do not connect unused outputs.
An output can be wired to either current or voltage.
Do not use current and voltage from the same source channel.
Wiring the Analog Power Supply
Wiring DC supply
1 Connect the "positive" cable to the "+V" terminal, and the “negative” to the "0V" terminal.
A non-isolated power supply can be used provided that a 0V signal is connected to the chassis.
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.
The 24VDC power supply must be turned on and off simultaneously with the module’s
power supply.
