IO-LC1, IO-LC3 I/O Expansion Modules 1-3

IO-LC1, IO-LC3 I/O Expansion Modules 1-3
IO-LC1, IO-LC3
I/O Expansion Modules 1-3 Loadcell Inputs, 1 Digital In, 2 Out
The IO-LC1 and IO-LC3 are I/O
Expansion Modules that can be used in
conjunction with specific Unitronics OPLC
controllers.
IO-LC1 offers 1 Loadcell input; IO-LC3
module offers 3 Loadcell inputs. Both
modules offer 1 PNP (source) input and 2
short-circuit protected PNP (source)
outputs with optional setpoint action that is
defined via software settings.
The interface between the module and the
OPLC is provided by an adapter.
The module 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
Power and I/O connection points
4
I/O connection points (IO-LC3 only)
5
Power and I/O status indicators
Note: The single Loadcell input offered by IO-LC1 is marked
6
Module-to-module connector port
LC and is located where the input LC2 is shown above.
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.
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.
Symbol
Caution
Meaning
Description
Danger
The identified danger causes physical
and property damage.
Warning
The identified danger can cause
physical and property damage.
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.
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I/O Expansion Modules
Check the user program before running it.
Do not attempt to use this device with parameters that exceed permissible levels.
To avoid damaging the system, do not connect / disconnect the device when the power is on.
Environmental 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.
Leave a minimum of 10mm space for ventilation 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.
Mounting the Module
DIN-rail mounting
44.5mm
(1.75")
93mm
(3.66")
Snap the device onto the DIN rail as shown below; the module will be squarely situated on the DIN rail.
3.5mm
(0.137")
14mm
(0.55")
2
60mm
(2.362")
80mm
(3.15")
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I/O Expansion Modules
Screw-Mounting
The figure below is not drawn to scale. It may be used as a guide for screw-mounting the module.
Mounting screw type: either M3 or NC6-32.
85mm
(3.346")
93mm
(3.66")
5.8mm
(0.228")
4mm
(0.16")
80mm
(3.15")
68.4mm
(2.693")
4mm (x2)
(0.16")
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I/O Expansion Modules
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
Do not touch live wires.
Unused pins should not be connected. Ignoring this directive may damage the device.
Do not connect the ‘Neutral or ‘Line’ signal of the 110/220VAC to the device’s COM pins.
Double-check all wiring before turning on the power supply.
Wiring Procedures
2
2
Use crimp terminals for wiring; use 26-12 AWG wire (0.13 mm –3.31 mm ) for all wiring purposes.
1.
2.
3.
4.
Strip the wire to a length of 7±0.5mm (0.250–0.300 inches).
Unscrew the terminal to its widest position before inserting a wire.
Insert the wire completely into the terminal to ensure that a proper connection can be made.
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 use tin, solder, or any other substance on stripped wire that might cause the wire strand to break.
Install at maximum distance from high-voltage cables and power equipment.
I/O Wiring—General
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 input lines used over an extended distance. Use wire
that is properly sized for the load.
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I/O Expansion Modules
External Power Supply
All of the IO-LC1, IO-LC3 I/O signals are isolated from the controller bus, but are not isolated from the power
supply input. If required, you can provide full isolation by using a separate isolated power-supply.
1.
Connect the "positive" cable to the "+V" terminal, and the "negative" cable to the "0V" terminal.
Do not connect the 'Neutral' or 'Line' signal of the 110/220VAC to any of the module's
terminals.
In case of voltage fluctuations or non-conformity to voltage power supply
specifications, connect the module to a regulated power supply.
Earthing the module
To maximize system performance, avoid electromagnetic interference by earthing the module.
1.
Connect one end of a wire, 14 AWG, to the chassis signal; connect the other end to the cabinet chassis.
This assumes that the cabinet is properly earthed. If this is not the case, do not earth the module.
Caution
The wire used to earth the module must not exceed 8 cm in length. If your conditions
do not permit this, do not earth the module.
Do not earth the module via the Loadcell cable shield.
External power supply and Digital I/O wiring
See Earthing the module
guidelines above.
Digital I/Os
Refer to External power supply and Digital I/O wiring above for wiring guidelines.
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Loadcell Inputs
Use 6 or 4 wire shielded cable (6 wire is recommended).
The cable shield should be connected ONLY to the Loadcell chassis. The shield at the other end of the
cable should be left unconnected.
Refer to the figures below for wiring guidelines.
6 wire Loadcell wiring
6
4 wire Loadcell wiring
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IO-LC1, IO-LC3 Technical Specifications
External Power-Supply
Nominal operating voltage
Operating voltage range
12 / 24VDC
10.2 to 28.8VDC
Power Consumption
Max. current consumption
From the adapter’s 5VDC
60mA
From external powersupply
At 12V
Max. total internal power
dissipation
Status Indicator
(RUN)
Loadcell Inputs
Number of inputs
Galvanic isolation
Loadcell to ext. pwr supply
Loadcell to bus
Loadcell to digital input
Loadcell to digital outputs
Input voltage ranges
Signal (+SG & -SG)
Differential
At 24V
One 350Ω Loadcell
45mA
30mA
4 x 350Ω Loadcells
70mA
45mA
12 x 350Ω Loadcells
140mA
80mA
At 12V
At 24V
1.0W
1.2W
See Note 1 for details
Green LED:
—Lit when a communication link is established between module and OPLC.
—Blinks when the communication link fails.
3 for IO-LC3, 1 for IO-LC1
No
Yes
No
No
Gain Setting (S.W. selectable)
0
*
Nominal Span
-20mV to +20mV
1
-80mV to +80mV
Offset compensation (S.W. selectable) can shift span by approx. -77.5mV to
+77.5mV (2.5mV steps).
1.5Vmin to 3.5Vmax (relative to the 0V terminal voltage)
*
Common-Mode
Sense (+SN & -SN)
Differential
Common-Mode
Excitation output (+E & -E)
Excitation type
Differential output voltage
Output current
Per Loadcell input
Total
Short circuit protection
A/D Converter
Conversion method
Resolution
Conversion period
-5V to +5V nominal
0Vmin to 5Vmax (relative to the 0V terminal voltage)
Software selectable: DC or AC (Alternating polarity square wave, see Note 6)
5V nominal
4.70Vmin to 5.20Vmax
200mA maximum (up to 12 x 350Ω Loadcells)
200mA maximum (up to 12 x 350Ω Loadcells)
Yes, up to 1 minute
Sigma–Delta
24 bits
12.5msec (80Hz)
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Linearity error
Common-mode rejection
Offset drift
Gain drift
Calibration and Zero
Filter
Loadcell input values
Polarity
Representation modes
Rounding
Effective resolution
Status indicators
(OUT OF RANGE)
Digital Input
Number of inputs
Input type
Galvanic isolation
Dig. input to ext. supply
Dig. input to bus
Dig. input to Loadcell
Dig. input to digital outputs
Nominal input voltage
Input voltage
Input current
Response time
Status indicator
(IN)
Digital Outputs
Number of outputs
Output type
Galvanic isolation
Dig. output to ext. pwr
supply
Dig. output to bus
Dig. output to Loadcell
Dig. output to digital input
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I/O Expansion Modules
0.01% maximum of full scale
>100dB @ DC, 50Hz, 60Hz
100nV / °C typ.
3ppm / °C typ.
—2 to 12 calibration-points (zero-point not required), direct/indirect point
addressing for editing and deleting calibrated points.
—Zero and tare acquisition and/or editing.
—Auto zero tracking
Adjustable settling time up to 24 sec. See Note 2 for details.
Either one or two independent values, signed 16 or 24 bit. Each weight/strain
value may be represented in a different mode; representation modes are
selected via software.
Fully bipolar operation – weight/strain values can be either positive or negative.
Net, Gross, Net Min, Net Max, uV/V or A/D Raw Value.
*
When uV/V is selected for one value, both values will be represented in uV/V.
**
The Net and Gross values may also indicate connection problems. See Note 3
for details.
The Net, Gross, Net Min and Net Max values may be rounded by 1, 2, 5, 10,
20, 50 or 100.
See Effective Resolution, page 10.
Red LEDs:
—Lit when the corresponding Loadcell is not connected to the input, or when
the input analog value exceeds the permissible range. See Note 3 for
details.
—Blinks when the external power-supply is not detected. See Note 4 for details.
1
pnp (source)
No
Yes
No
No
12 / 24VDC
0-5VDC for Logic '0'
9-28.8VDC for Logic '1'
5.5mA @ 12VDC,
11.5mA @ 24VDC
10mSec typical
Green LED—Lit when the input is active. See Note 5.
2 pnp (source)
P-MOSFET (open drain)
No
Yes
No
No
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IO-LC1, IO-LC3
Output current
Maximum frequency
ON voltage drop
Short circuit protection
Response time
Operating modes
Direct ladder control
Setpoint
I/O Expansion Modules
0.3A maximum per output
20Hz (resistive load)
0.5Hz (inductive load)
0.5V maximum
Yes
10mSec typical
Both outputs can be independently configured, via the software, to operate in
one of the following modes:
The output functions like a standard digital output, and is directly controlled
via ladder software. This is the default mode at power-up.
The output is linked to one of the active Loadcell input values and operates
according to parameters set by the application software.
Status indicators
(OUT)
Red LEDs—Lit when the corresponding output is active.
Environmental
Operating temperature
Storage temperature
Relative Humidity (RH)
IP20/NEMA1
0° to 50°C (32 to 122° F)
-20° to 60°C (-4 to 140° F)
5% to 95% (non-condensing)
Mechanical
Dimensions (WxHxD)
Weight
Mounting
80mm x 93mm x 60mm (3.15 x 3.66 x 2.362”)
170g (6oz)
Either onto a 35mm DIN-rail or screw- mounted.
Notes:
1. The maximum current consumption does not provide for output requirements.
The additional current requirement of the outputs must be added.
2.
The minimum settling times and settling time resolutions are: 12.5ms for one active channel, 675ms for two
active channels and 1,012.5ms for three active channels
3.
The following connection-problems will cause the corresponding OUT OF RANGE LED to light up:
- Disconnection of one of the signal (±SG) lines
- Disconnection of one or both of the sense (±SN) lines
When the Out Of Range LED is lit, the Out Of Range bit of the corresponding Loadcell Status Message turns
ON, and the Loadcell's Net and Gross values will be set according as follows:
4.
Normal Resolution
High Resolution
15
23
-2 = -8,388,608 = FF80 0000 Hex
Under-Range: -2 = -32,768 = 8000 Hex
15
23
2 - 1 = 32,767 = 7FFF Hex
2 - 1 = 8,388,607 = 007F FFFF Hex
Over-Range:
When the external power-supply cannot be detected, the No Power Bit in all of the Loadcell Status
Messages turns ON.
5.
The input's LED light up only when a communication link is established between module and OPLC.
6.
AC excitation has the advantage of lower offset drift errors, improving performance over time and in the
presence of ambient temperature changes. To minimize the impact of offset drift errors in your loadcell
application, the use of AC excitation is recommended.
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I/O Expansion Modules
Effective Resolution
Gain = 0 (Total input span = -20mV to +20mV)
The effective resolution depends on several electrical parameters including the gain setting, the input
span that is used (usually 10mV for 2mV/V Loadcells or 15mV for 3mV/V Loadcells), the amount of
uncompensated differential offset, and the applied input noise.
The number of Loadcell inputs used per expansion module affects the sampling rate for each of them,
resulting in lower filter depth and effective resolution.
The filter settling time can be programmed separately for each Loadcell input without affecting the
other(s).
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I/O Expansion Modules
Addressing I/Os on Expansion Modules
Inputs and outputs located on I/O expansion modules that are connected to an 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.
Adapter
0
1
2
3
4
5
6
7
Expansion module
identification number
The formula below is used to assign addresses for I/O modules used in conjunction with the 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-DI8RO8 is always assigned the number 7.
Its I/Os are addressed accordingly.
Example
Input #5, located on an EX90-DI8-RO8 connected to an OPLC will be addressed
as I 149, 149 = 32 + 7 • 16 + 5
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About Unitronics
Unitronics Industrial Automation Systems has been producing PLCs, automation software and accessory
devices since 1989.
Unitronics’ OPLC controllers combine full-function PLCs and HMI operating panels into single, compact units.
These HMI + PLC devices are programmed in a single, user-friendly environment. Our clients save I/O points,
wiring, space, and programming time; elements that translate directly into cost-efficiency.
Unitronics supports a global network of distributors and sales representatives, as well as a U.S. subsidiary.
For more information regarding Unitronics products, contact your distributor, Unitronics headquarters via email:
[email protected], or visit the Unitronics website at http://www.unitronics.com/.
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.
No part of this document may be used for any purpose other than for the purposes specifically indicated
herein nor may it be reproduced or transmitted in any form or by any means, electronic or mechanical,
including photocopying and/or recording, for any purpose without written permission from Unitronics.
The information appearing in this document is for general purposes only. Unitronics makes no warranty
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0implied warranties of merchantability and/or fitness for a particular use or purpose. Unitronics assumes
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document nor for any use of the Unitronics products referred to herein in any manner deviating from the
recommendations made in this document. Unitronics assumes no responsibility for the use of any parts,
components, or other ancillary appliances including circuitry other than as recommended hereunder or
other than that embodied in the Unitronics product.
Unitronics retains all rights to its proprietary assets including, but not limited to its software products
which are copyrighted and shall remain the property of Unitronics. Copyright protection claimed includes
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5408-0220-5
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Unitronics Industrial Automation
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