Unitronics Industrial Automation
1
IO-DI8-RO4, IO-DI8-RO4-L
I/O Expansion Modules 8 Inputs, 4 Outputs
The IO-DI8-RO4 and IO-DI8-RO4-L are I/O
expansion modules that can be used in
conjunction with specific Unitronics OPLC
controllers.
The modules are identical except for their
voltage specifications: IO-DI8-RO4 runs at
24 VDC; IO-DI8-RO4-L at 12 VDC.
Both modules offer 8 digital inputs, type
pnp/npn (source/sink), and 4 relay outputs.
The interface between a module and the
OPLC is provided by an adapter.
These modules may either be snap-
mounted on a DIN rail, or screw-mounted
onto a mounting plate.
Component identification
1 Module-to-module
connector
2
Communication status indicator
3
Outputs’ power supply
connection points
4
Output connection points
5
Input/Output status indicators
6
Module-to-module connector port
7
Input connection points
1
6
7
2
3
5
4
IO-DI8-RO4
Before using this product, it is the responsibility of the user to read and understand this document and
any accompanying documentation.
All examples and diagrams shown herein are intended to aid understanding, and do not guarantee
operation. Unitronics accepts no responsibility for actual use of this product based on these examples.
Please dispose of this product in accordance with local and national standards and regulations.
Only qualified service personnel should open this device or carry out repairs.
User safety and equipment protection guidelines
This document is intended to aid trained and competent personnel in the installation of this equipment as
defined by the European directives for machinery, low voltage, and EMC. Only a technician or engineer trained
in the local and national electrical standards should perform tasks associated with the device’s electrical wiring.
Symbol Meaning
Description
Danger
The identified danger causes physical
and property damage.
Warning
The identified danger can cause
physical and property damage.
Symbols are used to highlight
information relating to the user’s
personal safety and equipment
protection throughout this document.
When these symbols appear, the
associated information must be read
carefully and understood fully.
Caution
Caution Use
caution.
Failure to comply with appropriate safety guidelines can result in severe personal injury or
property damage. Always exercise proper caution when working with electrical equipment.
