Slave Unit/Repeater Unit
CRT1 Series
Safety Precautions
©
OMRON Corporation 2009 - 2012 All Rights Reserved.
Safety Precautions
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Meanings of Signal Words
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Warnings
WARNING
WARNING
Caution
Caution
WARNING
WARNING
Do not touch the terminal section and do not touch the interior of any Unit while the power is
being supplied. In addition, do not turn ON the power supply while the cover is open. Doing
any of these may result in electric shock.
Thank you for purchasing an OMRON CRT1-series Slave Unit/Repeater Unit. To ensure
safe operation, please be sure to read this document along with the manuals that are listed
below. Please be sure you are using the most recent versions of the user manuals. Contact
your nearest OMRON representative to obtain manuals. Keep this document and all user
manuals in a safe location and be sure that they are readily available to the final user of the
products.
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CompoNet Analog I/O Slave (Numerical indicator type) User’s Manual (Cat. No. W484)
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CRT1 Series CompoNet Slave Units and Repeater Unit (Cat. No. W457)
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CS1W-CRM21/CJ1W-CRM21CompoNet Master Units Operation Manual (Cat. No. W456)
Precautions for Safe Use
Precautions for Correct Use
When transporting the Unit, use special packing boxes and protect it from being exposed to excessive
vibration or impact during transportation.
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Do not drop any Unit or subject any Unit to excessive shock or vibration. Otherwise, Unit failure or
malfunction may occur.
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Mount the Units securely using DIN Track, brackets, or screws.
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Make sure that all Slave Unit/Repeater Unit mounting screws and cable screws are tightened to the
torque specified in the relevant manuals. Incorrect tightening torque may result in malfunction.
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Make sure that the terminal blocks, communications cables, and other items with locking devices are
properly locked into place. Improper locking may result in malfunction.
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When installing the Units, ground to 100
Ω
min.
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Wire all connections correctly according to instructions in the manuals.
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Always separate Flat Cables for different CompoNet lines by at least 5 mm to prevent unstable
operation due to interference. Do not bundle Flat Cables.
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Do not extend connection distances or the number of connected nodes beyond the ranges given in the
specifications.
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Do not allow foreign matter to enter the Unit.
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Use the correct wiring materials to wire the Units.
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Use the correct wiring tools to wire the Units.
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Always use the specified communications cables and connectors.
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Confirm the polarity of all terminals before wiring them.
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Do not bend cables past their natural bending radius or pull on cables.
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Observe the following precautions when wiring the communications cable.
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Separate the communications cables from the power lines or high-tension lines.
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Do not bend the communications cables past their natural bending radius.
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Do not pull on the communications cables.
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Do not place heavy objects on top of the communications cables.
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Always lay communications cable inside ducts.
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Take appropriate measures to ensure that power with the rated voltage and frequency is supplied. Be
particularly careful in places where the power supply is unstable. An incorrect power supply may result
in malfunction.
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Install external breakers and take other safety measures against short-circuiting in external wiring.
Insufficient safety measures against short-circuiting may result in burning.
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Fail-safe measures must be taken by the customer to ensure safety in the event of incorrect, missing,
or abnormal signals caused by broken signal lines, momentary power interruptions, or other causes.
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The operating environment of the PLC System can have a large effect on the longevity and reliability of
the system. Improper operating environments can lead to malfunction, failure, and other unforeseeable
problems with the PLC System. Be sure that the operating environment is within the specified
conditions at installation and remains within the specified conditions during the life of the system.
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Install and wire the Unit correctly according to instructions in the reference manuals. Improper
installation or wiring may result in malfunction.
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Do not operate the control system in the following locations:
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Locations subject to direct sunlight.
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Locations subject to temperatures or humidity outside the range specified in the specifications.
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Locations subject to condensation as the result of severe changes in temperature.
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Locations subject to corrosive or flammable gases.
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Locations subject to dust (especially iron dust) or salts.
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Locations subject to exposure to water (excluding waterproof Bit Slaves).
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Locations subject to exposure to oil, acid, or chemicals (all Units).
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Locations subject to shock or vibration.
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Prevent cables and other substances from accidentally pressing the input keys.
Conformance to EC Directives
The OMRON products described in this manual comply with the related EMC Directives. To ensure that
the machine or device in which the products are used complies with EC Directives, the products must be
installed as follows:
1. The products must be installed within a control panel.
2. A DC power supply with reinforced insulation or double insulation that can maintain a stable output
even if the input is interrupted for 10 ms must be used for communications power, internal power, and
I/O power. The OMRON S82J-series Power Supply is recommended. (See note.)
3. Products complying with EC Directives also conform to the Emission Standards (EN 61131-2 and EN
61000-6-4). Radiated emission characteristics (10-m regulations) may vary depending on the
configuration of the control panel used, other devices connected to the control panel, wiring, and other
conditions. You must therefore confirm that the overall machine or equipment complies with EC
Directives.
4. TRANSLATION: Conformance with EC Directives was confirmed with a system configuration using
I/O wiring lengths of less than 30 m and power supply wiring lengths of less than 10 m.
Note
Conformance with the EMC Directive was confirmed when using the recommended power
supply.
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This is a class A product. In residential areas it may cause radio interference, in which case the user
may be required to take adequate measures to reduce interference.
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to
the combination of the products in the customer's application or use of the product.
Take all necessary steps to determine the suitability of the product for the systems, machines, and
equipment with which it will be used.
Know and observe all prohibitions of use applicable to the product.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT IS PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
See also Product catalog for Warranty and Limitation of Liability.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.
Indicates a potentially hazardous situation which, if not avoided, will
result in minor or moderate injury, or may result in serious injury or
death. Additionally there may be significant property damage.
Provide safety measures in external devices (i.e., not in the PLC), including the following
items, to ensure safety in the system if an abnormality occurs due to malfunction of the PLC
or another external factor affecting the PLC operation. (“PLC” includes the CPU Unit, other
Units mounted in the PLC, Slave Units, and Repeater Units.) Not doing so may result in
serious accidents.
1. Emergency stop circuits, interlock circuits, limit circuits, and similar safe measures must
be provided in external circuits (i.e., not in the PLC).
2. The PLC will turn OFF all outputs when its self-diagnosis function detects any error or
when a SEVERE FAILURE ALARM (FALS) instruction is executed. As a countermeasure
for such errors, external safety measures must be provided to ensure safety in the
system.
3. The PLC outputs may remain ON or OFF due to deposits on or burning of the output
relays, or destruction of the output transistors. As a countermeasure for such problems,
external safety measures must be provided to ensure safety in the system.
4. When the 24-V DC output (service power supply) is overloaded or short-circuited, the
voltage may drop and result in the outputs being turned OFF. As a countermeasure for
such problems, external safety measures must be provided to ensure safety in the
system.
The CPU Unit refreshes I/O even when the program is stopped (i.e., even in PROGRAM
mode). Confirm safety thoroughly in advance before changing the status of any part of
memory allocated to I/O Units, Special I/O Units, or CPU Bus Units. Any changes to the
data allocated to any Unit may result in unexpected operation of the loads connected to the
Unit. Any of the following operation may result in changes to memory status.
Changing present values in memory from a Programming Device.
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Force-setting/-resetting bits from a Programming Device.
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Transferring I/O memory files from a Memory Card or EM file memory to the CPU Unit.
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Transferring I/O memory from a host computer or from another PLC on a network.
Do not apply a voltage or current outside the specified range to the Unit. It may cause a
malfunction or fire.
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Confirm voltage specifications when wiring communications, the power supply, and I/O crossovers.
Incorrect wiring may result in malfunction.
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Do not apply voltages or connect loads to the Output Units in excess of the maximum switching
capacity. Excess voltage or loads may result in burning.
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After replacing Units, resume operation only after transferring to the new CPU Unit and Special I/O
Units the contents of the DM Area, Holding Area, and other data required for resuming operation. Not
doing so may result in an unexpected operation.
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Check the user program for proper execution before actually running it on the PLC. Not checking the
program may result in unexpected operation.
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Check all wiring and switch settings to be sure they are correct.
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Always turn OFF the power supply to the PLC and Slave Unit/Repeater Unit before attempting any of
the following. Not turning OFF the power supply may result in malfunction or electric shock.
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Assembling any Units (Expansion Units).
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Removing or attaching terminal blocks and connectors to a Slave Unit/Repeater Unit.
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Replacing parts (e.g., relays).
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Setting DIP switches or rotary switches.
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Connecting cables or wiring the system.
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Confirm that no adverse effect will occur in the system before attempting any of the following. Not doing
so may result in an unexpected operation.
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Changing the operating mode of the PLC.
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Setting/resetting any bit in memory.
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Changing the present value of any word or any set value in memory.
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Operating the I/O test functions.
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Operating the user adjustment functions on Output Units.
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Touch a grounded piece of metal to discharge static electricity from your body before touching any Unit.
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When replacing parts (e.g., relays), be sure to confirm that the ratings of the new part are correct. Not
doing so may result in malfunction or burning.
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Do not attempt to disassemble, repair, or modify any Units. Any attempt to do so may result in
malfunction, fire, or electric shock.
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Tighten the screws on the cover to the specified torque after setting the rotary switches and wiring.
Insufficient tightening torque may result in inadequate protection (only for waterproof Bit Slaves).
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Take appropriate and sufficient countermeasures when installing systems in the following locations:
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Locations subject to static electricity or other forms of noise.
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Locations subject to strong electromagnetic fields.
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Locations subject to possible exposure to radioactivity.
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Locations close to power supplies.
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Do not use thinner for cleaning. Use commercially available alcohol instead.
1131809-0B
OMRON Corporation
OMRON Corporation
Industrial Automation Company
Tokyo, JAPAN
Regional Headquarters
OMRON EUROPE B.V.Wegalaan
67–69, NL–2132 JD Hoofddorp
The Netherlands
Tel: (31)2356-81-300
Fax: (31)2356-81-388
OMRON ASIA PACIFIC PTE. LTD.
No. 438A Alexandra Road #
05–05/08
(Lobby 2), Alexandra Technopark,
Singapore 119967
Tel: (65) 6835–3011
Fax: (65) 6835–2711
Note:
Specifications subject to change without notice.
Printed in China
OMRON ELECTRONICS LLC
One Commerce Drive Schaumburg,
IL 60173–5302 U.S.A.
Tel: (1) 847–843–7900
Fax: (1) 847–843–7787
OMRON (CHINA) CO., LTD.
Room 2211, Bank of China Tower,
200 Yin Cheng Zhong Road,
Pu Dong New Area, Shanghai,
200120, China
Tel: (86) 21–5037–2222
Fax: (86) 21–5037–2200
Contact: www.ia.omron.com
