Wiring; Wiring Instructions - Mitsubishi MELSEC-A A2USHCPU-S1 User Manual

8. LOADING AND INSTALLATION
8.7

Wiring

8.7.1

Wiring instructions

Instructions for wiring the power cable and I/O wire.
DANGER
Always ground the FG and LG terminals to the protective ground connector.
CAUTION
Failure to do so may cause an electric shock or malfunctions.
Wire the module correctly after confirming the rated voltage and terminal layout.
Connecting a power supply of a different voltage rating or incorrect wiring may cause
a fire or failure.
Do not connect multiple power supply modules to one module in parallel.
The power supply modules may be heated, resulting in a fire or failure.
Press, crimp or properly solder the connector for external connection with the
specified tool.
Incomplete connection may cause a short circuit, fire or malfunctions.
Tighten terminal screws within the specified torque range.
If the screw is too loose, it may cause a short circuit, fire or malfunctions.
If too tight, it may damage the screw and/or the module, resulting in a drop of the
module, a short circuit or malfunctions.
Carefully prevent foreign matter such as dust or wire chips from entering the module.
Failure to do so may cause a fire, failure or malfunctions.
Install our programmable controller in a control panel for use.
Wire the main power supply to the power supply module installed in a control panel
through a distribution terminal block.
Furthermore, the wiring and replacement of a power supply module have to be
performed by a maintenance worker who acquainted with shock protection.
(For the wiring methods, refer to Section 8.7.)
(1)
Be sure to shut off all the phases of the external power supply used by the system
before wiring.
Failure to do so may result in an electric shock or damage of the product.
Before energizing and operating the system after wiring, be sure to attach the
terminal cover supplied with the product.
Failure to do so may cause an electric shock.
Wiring power supply
(a) When voltage fluctuations are larger than the specified value, connect a
constant-voltage transformer.
Constant
voltage
transformer
Programmable
controller
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