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● Do not bundle the control cable or communication cable with the main circuit or power wire, or lay them
adjacently. Separate these by 100 mm or more as a rule.
Failure to observe this could lead to malfunctioning caused by noise.
● When a lamp load or an inductive load, such as a heater and a solenoid valve, is controlled, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on. Use a
module having a sufficient current rating.
● The time for the CPU module to enter the RUN status after the CPU module is powered off and on or reset
will vary depending on the system configuration, parameter settings, and/or program size, etc. Design the
program so that the entire system will operate safely even if the time to reach the RUN status varies.
● Shut off the external power supply for the system in all phases before mounting or removing the module.
Failure to do so may cause electric shock, damage to the module or malfunction.
● Use the programmable controller in an environment that conforms to "GENERAL SPECIFICATIONS" in the
LCPU User's Manual (Hardware Design, Maintenance and Inspection).
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the product.
● To mount modules, engage their connectors, slide them until the module connecting hook stops, and lock the
hook securely.
Incorrect mounting may cause malfunction, failure or drop of the module.
● Do not directly touch any conductive part or electronic component of any module.
Doing so can cause malfunction or failure of the module.
● When using an extension cable, connect it to the extension connectors of the branch module and extension
module. After connecting, check the connections for looseness.
Poor contact may cause malfunction.
● When using an SD memory card, fully insert it into the SD memory card slot. Check that it is inserted completely.
Poor contact may cause malfunction.
● Do not directly touch any conductive part or electronic component of the module or SD memory card.
Doing so can cause malfunction or failure.
● Shut off the external power supply for the system in all phases before wiring the module.
Failure to do so may result in electric shock or failure or malfunction of the module.
● After mounting or wiring, attach the included terminal cover onto the module before turning the power on or
starting operation.
Failure to do so may result in electric shock.
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Design Precautions
CAUTION
Installation Precautions
WARNING
CAUTION
Wiring Precautions
WARNING
9
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