3
[Wiring Precautions]
[Startup and Maintenance Precautions]
CAUTION
●
Individually ground the FG and LG terminals of the programmable controller with a ground resistance
of 100 ohms or less. Failure to do so may result in electric shock or malfunction.
●
Check the rated voltage and terminal layout before wiring to the module, and connect the cables
correctly. Connecting a power supply with a different voltage rating or incorrect wiring may cause a fire
or failure.
●
Connectors for external devices must be crimped with the tool specified by the manufacturer or must
be correctly soldered. Incomplete connections may cause short circuit, fire, or malfunction.
●
Place the cables in a duct or clamp them. If not, dangling cable may swing or inadvertently be pulled,
resulting in damage to the module or cables or malfunction due to poor contact.
●
Tighten the connector screws within the specified torque range. Undertightening can cause drop of
the screw, short circuit, fire, or malfunction. Overtightening can damage the screw and/or module,
resulting in drop, short circuit, fire, or malfunction.
●
Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can
cause a fire, failure, or malfunction.
●
A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring. Do not remove the film during wiring. Remove it for heat
dissipation before system operation.
●
Ground the shield cable on the encoder side (relay box). Always ground the FG and LG terminals to
the protective ground conductor. Failure to do so may cause malfunction.
●
Mitsubishi programmable controllers must be installed in control panels. Connect the main power
supply to the power supply module in the control panel through a relay terminal block. Wiring and
replacement of a power supply module must be performed by qualified maintenance personnel with
knowledge of protection against electric shock. For wiring methods, refer to the MELSEC-L CPU
Module User's Manual (Hardware Design, Maintenance and Inspection).
WARNING
●
Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
●
Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the connector screws. Failure to do so may result in electric shock.
Summary of Contents for MELSEC-L Series LD40PD01
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