Mitsubishi Electric MELSEC-A Series User Manual page 6

[Wiring Precautions]
● Use applicable solderless terminals and tighten them within the specified torque range. If any spade
solderless terminal is used, it may be disconnected when a terminal block screw comes loose,
resulting in failure.
● When wiring in the programmable controller, be sure that it is done correctly by checking the
product's rated voltage and the terminal layout.
Connecting a power supply that is different from the rating or incorrectly wiring the product could
result in fire or damage.
● Tighten the terminal screws with the specified torque.
If the terminal screws are loose, it could result in short circuits, fire, or erroneous operation.
Overtightening a terminal screw may damage the screw, resulting in a short circuit or malfunction.
● Be sure there are no foreign substances such as sawdust or wiring debris inside the module.
Such debris could cause fires, damage, or erroneous operation.
● Place the connection wires and cables in a duct or clamp them.
If not, dangling cables may swing or inadvertently be pulled, resulting in damage to the module and/
or cables or malfunctions due to poor cable connection.
● Do not install the control cable(s) together with the communication cable(s).
Doing so may cause malfunctions due to noise.
● When disconnecting a communication or power cable from the module, do not pull it by holding the
cable part.
For a cable with connector, hold the connector and disconnect it from the module.
For a cable without connector, loosen the connector screw and disconnect the cable.
Pulling the cable that is still connected to the module may damage the module and/or cable and
cause malfunctions due to poor cable connection.
● Make sure that the interface type is correct before connecting the cable.
Do not connect a cable to a module that has different interface specification.
Doing so will cause a module failure.
● Using a tool specified by the manufacturer, correctly press, crimp, or solder the wires of the
connector and securely connect the connector to the module.
Failure to do so may result in a malfunction or failure of the module.
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CAUTION