Hitachi H Series, Instruction Manual

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They may become the cause of fire, malfunction or failure.
2. About wiring
REQUIRED
Always perform grounding (FE terminal).
If grounding is not performed, there is a risk of electric shocks and
malfunctions.
CAUTION
Connect power supply that meets rating.
If a power supply that does not meet rating is connected, fire may be
caused.
Qualified personnel should perform the wiring operation.
If wiring is performed incorrectly, it may result in fire, damage, or electric
shock.
3. Precautions when using the unit
DANGER
Do not touch the terminals while the power is on.
There is risk of electric shock.
Structure the emergency stop circuit, interlock circuit, etc. outside the
programmable controller (hereinafter referred to as PLC).
Damage to the equipment or accidents may occur due to failure of the PLC.
However, do not interlock the unit to external load via relay drive power
supply of the relay output module.
CAUTION
When performing program change, forced output, RUN, STOP, etc., while
the unit is running, be sure to verify safety.
Damage to the equipment or accidents may occur due to operation error.
Supply power according to the power-up order.
Damage to the equipment or accidents may occur due to malfunctions.
CAUTION
When removing or attaching the connection cable between the
programmable controller and personal computer, it is recommended to
perform the action completely after turning off the power to the personal
computer and programmable controller.
Removing or attaching the cable without turning the power off on both
sides may result in damage.