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Connecting the EX-A1 to an I/O expansion module
1
Push the module-to-module connector into the port located on the right side of the EXA1.
Note that there is a protective cap provided to cover the port of the final I/O module in the system.
To avoid damaging the system, do not connect or disconnect the device when the
power is on.
Component
identification
1
Module-to-module
connector
2
Protective cap
Wiring
Wire Size
Use 26-12 AWG wire (0.13 mm
to wire the power supply.
Wiring Considerations
Wiring DC supplies: 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.
Note that both the OPLC and the EX-
A1 must be connected to the same
power supply.
Do not use tin, solder or any other substance on the stripped wire that might cause the wire strand
to break.
We recommend that you use crimp terminals for wiring.
Install at maximum distance from high-voltage cables and power equipment.
Wiring the power supply
1 Strip the wire to a length of 7±0.5mm (0.250–0.300 inches).
2 Unscrew the terminal to its widest position before inserting a wire.
3 Insert the wire completely into the terminal to ensure that a proper
connection can be made.
4 Tighten enough to keep the wire from pulling free.
To avoid damaging the wire, do not exceed a maximum torque of 0.5 N·m (5 kgf·m).
Unitronics Industrial Automation Systems
EX- A1
1
2
2
–3.31 mm
)
12VDC or
24VDC
power
supply
I / O E x p a n s i o n M o d u l e Ad a p t e r
Circuit protection
device
0V
+V
2
5
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