Power Supply; Communication Port - Unitronics Vision OPLC V350-35-TR20 Installation Manual

Power Supply

The controller requires an external 24VDC power supply.
 The power supply must include double insulation. Outputs must be rated as
SELV/PELV/Class 2/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 use the shortest and thickest possible wire.

Communication Port

 Turn off power before making communications connections.
 Signals are related to the controller's 0V; the same 0V is used by the power supply.
 Always use the appropriate port adapters.
Caution
 The serial port is not isolated. If the controller is used with a non-isolated external device,
avoid ground potential difference that exceeds ± 10V.
Port 1 is type RJ-11 and may be set to either RS232 or RS485 via jumper as shown below.
By factory default, the port is set to RS232, termination ON.
 Use RS232 to download programs from a PC, and to communicate with serial devices and
applications, such as SCADA.
 Use RS485 to create a multi-drop network containing up to 32 devices.
8
npn Outputs
V350-35-TR20 Installation Guide
Unitronics