Specifications

Wiring Power for I/O Expansion Modules Minimizing EMI: System Design Guidelines
10 VisiLogic: Getting Started
Wiring Power for I/O Expansion Modules
The examples below are based on the EX-A1.
1. If the power-supply is closer to the PLC than it is to the module’s power
supply (EX-A1):
- Create 0V and 24V junctions at the PLC respective terminals (see the
following figure) and directly connect the PLC main supply lines to the EX-
A1.
- Continue daisy-chaining the supply lines to the expansion I/O units.
Please ensure that the wire segment which carries the 0V between
the EX-A1 and the PLC does not branch.
When the power-supply is near the PLC, connect the PLC first as shown in
the next figure.
1. If the power-supply is closer to the EX-A1 than it is to the PLC:
- Create 0V and 24V junctions at the EX-A1 respective terminals (see the
following figure) and directly connect the EX-A1 main supply lines to the
PLC.
- Split the supply lines at the EX-A1 terminals and continue daisy-chaining
them to the expansion I/O units.
Please ensure that the wire segment which carries the 0V between
the EX-A1 and the PLC does not branch.
When the power-supply is near the EX-A1, connect the EX-A1 first as
shown in the next figure.