Unitronics IO-RO8 User manual

Unitronics Industrial Automation Systems 1
IO-RO8, IO-RO8L I/O Expansion Module 8 Relay Outputs
The IO-RO8 and IO-RO8L are I/O
expansion modules that can be used in
conjunction with specific Unitronics OPLC
controllers.
The modules are identical except for their
power supply specifications: IO-RO8 runs
at 24 VDC; IO-RO8L at 12 VDC.
Both modules offer 8 relay outputs.
The interface between module and 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: O4-O7
5 Output’s status indicators
6 Module-to-module connector port
7 Output connection points: O0-O3
1 6
2
3
4
7
5
POWER
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 electrical wiring of this device.
 Under no circumstances will Unitronics be liable or responsible for any consequential damage that may
arise as a result of installation or use of this equipment, and is not responsible for problems resulting from
improper or irresponsible use of this device.
 All examples and diagrams shown in the manual are intended to aid understanding. They do not
guarantee operation.
 Unitronics accepts no responsibility for actual use of this product based on these examples.
 Only qualified service personnel should open this device or carry out repairs.
 Please dispose of this product in accordance with local and national standards and regulations.
 Check the user program before running it.
 Do not attempt to use this device with voltage exceeding permissible levels.
 Install an external circuit breaker and take appropriate safety measures against short-circuiting
in external wiring.
 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.

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Mounting the Module
Mounting Considerations
 Do not install in areas with: excessive or conductive dust, corrosive or
flammable gas, moisture or rain, excessive heat, regular impact
shocks or excessive vibration.
 Provide proper ventilation by leaving a minimum space of 10mm
between the top and bottom edges of the device and the enclosure
walls.
 Do not place in water or let water leak onto the unit.
 Do not allow debris to fall inside the unit during installation.
DIN-rail mounting
Snap the device onto the DIN rail as shown below; the module will be squarely situated on the DIN rail.
60mm
3.5mm
14mm
80mm
93mm
44.5mm
POWER
Screw-Mounting
The figure on the next page is drawn to scale. It may be used as a guide for screw-mounting the module.
Mounting screw type: either M3 or NC6-32.

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Unitronics Industrial Automation Systems 3
4mm
5.8mm
85mm
80mm
68.4mm
93mm
4mm (x2)

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4 Unitronics Industrial Automation Systems
Connecting Expansion Modules
An adapter provides the interface between the OPLC and an expansion module. To connect the I/O module to
the adapter or to another module:
1 Push the module-to-module connector into the port located on the right side of the device.
Note that there is a protective cap provided with the adapter. This cap covers the port of the final
I/O module in the system.
 To avoid damaging the system, do not connect or disconnect the device when the
power is on.
Component identification
1 Module-to-module
connector
2 Protective cap
1 2
Wiring
Wire Size
Use 26-12 AWG wire (0.13 mm 2–3.31 mm2) for all wiring purposes.
Wiring Considerations
 Note that the adapter and outputs’ power supply must be connected to the same 0V signal.
 Do not use tin, solder or any other substance on the stripped wire that might cause the wire strand to
break.
 We recommend that you use crimp terminals for wiring.
 Install at maximum distance from high-voltage cables and power equipment.
General Wiring Procedures
1 Strip the wire to a length of 7±0.5mm (0.250–0.300 inches).
2 Unscrew the terminal to its widest position before inserting a wire.
3 Insert the wire completely into the terminal to ensure that a proper
connection can be made.
4 Tighten enough to keep the wire from pulling free.
To avoid damaging the wire, do not exceed a maximum torque of 0.5 N·m (5 kgf·m).
 Do not touch live wires.
 Double-check all the wiring before turning on the power supply.
I/O Wiring
 Input or output cables should not be run through the same multi-core cable or share the same wire.
 Allow for voltage drop and noise interference with output lines used over an extended distance. Use wire
that is properly sized for the load.

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Wiring Outputs’ Power Supply
1 Connect the "positive" cable to the “+VO” terminal, and the “negative” to the “0V”
terminal.
 A non-isolated power supply can be used provided that a 0V signal is connected to the chassis.
 Do not connect the ‘Neutral’ or ‘Line’ signal of the 110/220VAC to the 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.
Load
0V
N
0V
NN
0V
N
0V
+V (24VDC)
L1, L2, L3 (115/230VAC)
*
Circuit Protection
Device
Load
L1, L2, L3 (115/230VAC)
+V (24VDC)
0V
N
0V
NN
0V
N
0V
Outputs'
power supply
0V
+V
POWER
*
Increasing Contact Life Span
Both models have 8 relay outputs. To increase the
life span of these contacts and protect the module
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.
* Note that only the IO-RO8 requires 24VDC as
shown; IO-RO8L requires 12VDC.
L1, L2, L3
(115/230VAC)
0V
+V
(24VDC)
N
R
C
POWER
*

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IO-RO8, IO-RO8L Technical Specifications
Max. current consumption 50mA maximum from the adapter’s 5VDC
Typical power consumption 0.13W@ 5VDC
Status indicators
(RUN) Green LED:
—Lit when a communication link is established between module and OPLC.
—Blinks when the communication link fails.
Outputs
Number of outputs 8 relay
Output type SPST-NO relay; 230VAC / 12/24VDC
Type of relay: IO-RO8 Takamisawa JY-24H-K or NAIS (Matsushita) JQ1AP-24V
or OMRON G6B-1114P-24VDC
Type of relay: IO-RO8L Fujitsu JY-12H-K or NAIS (Matsushita) JQ1AP-12V
or OMRON G6B-1114P-12VDC
Isolation By relay
Status Indicators
(O0 to O7) Red LEDs—Lit when the corresponding output is active.
Output current 5A maximum (resistive load)
1A maximum (inductive load)
Maximum frequency 10Hz
Contact protection External precautions required (see above: Increasing Contact Life Span)
Outputs’ power supply: IO-RO8
Nominal operating voltage 24VDC
Operating voltage 20.4 to 28.8VDC
Maximum current consumption 75mA@24VDC
Outputs’ power supply: IO-RO8L
Nominal operating voltage 12VDC
Operating voltage 10.2 to 15.6VDC
Maximum current consumption 145mA@12VDC
Environmental IP20/NEMA1
Operating temperature 0° to 50° C (32 to 122°F)
Storage temperature -20° to 60° C (-4 to 140°F)
Relative Humidity (RH) 5% to 95% (non-condensing)
Dimensions (WxHxD) 80mm x 93mm x 60mm (3.15” x 3.66” x 2.362”)
Weight 183g (6.45 oz.)
Mounting Either onto a 35mm DIN-rail or screw- mounted.

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Addressing I/Os on M90 Expansion Modules
Inputs and outputs located on I/O expansion modules that are connected into an M90 OPLC are assigned
addresses that comprise a letter and a number. The letter indicates whether the I/O is an input (I) or an
output (O). The number indicates the I/O’s location in the system. This number relates to both the position of
the expansion module in the system, and to the position of the I/O on that module.
Expansion modules are numbered from 0-7 as shown in the figure below.
01234567
Expansion module
identification number
Adapter
The formula below is used to assign addresses for I/O modules used in conjuction with the M90 OPLC.
X is the number representing a specific module’s location (0-7). Y is the number of the input or output on that
specific module (0-15).
The number that represents the I/O’s location is equal to:
32 + x • 16 + y
Examples
 Input #3, located on expansion module #2 in the system, will be addressed as I 67,
67 = 32 + 2 • 16 + 3
 Output #4, located on expansion module #3 in the system, will be addressed as O 84,
84 = 32 + 3 • 16 + 4.
EX90-DI8-RO8 is a stand-alone I/O module. Even if it is the only module in the configuration, the EX90-DI8-
RO8 is always assigned the number 7.
Its I/Os are addressed accordingly.
Example
 Input #5, located on an EX90-DI8-RO8 connected to an M90 OPLC will be addressed
as I 149, 149 = 32 + 7 • 16 + 5

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