Power Supply - Unitronics Vision OPLC V130-J-TR20 Installation Manual

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

Power Supply

The controller requires an external 24VDC power supply.
The power supply must include double insulation. Outputs must be rated as
SELV/PELV/Class2/Limited Power.
Use separate wires to connect the functional
earth line (pin 3) and the 0V line (pin 2) to the
system earth ground.
Install an external circuit breaker. Guard
against short-circuiting in external wiring.
Double-check all wiring before turning
on the power supply.
Do not connect either the 'Neutral' or 'Line'
signal of the 110/220VAC to 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.
Earthing the OPLC
To maximize system performance, avoid electromagnetic interference by:
Mounting the controller on a metal panel.
Connect each common and ground connection directly to the earth ground of your system.
For ground wiring uses the shortest and thickest possible wire.
8
npn Outputs (TR20 Only)
Vision™ OPLC™ Installation Guide
Unitronics