Vision™PLC+HMI Installation Guide
8
Unitronics
Analog Input
Current connections (2/3-wire)
Analog input wiring, current (4-wire), voltage
Shie
lds should be connected at the signal’s source.
The 0V signal of the analog input must be connected to the controller’s 0V.
Please notice that AN2 to AN5 may be used as analog current inputs only.
Relay Outputs
Increasing Contact Life Span
To increase the life span of the relay output contacts
and protect the device from potential damage by
reverse EMF, connect:
A clamping diode in parallel with each inductive
DC load
An RC snubber circuit in parallel with each
inductive AC load
