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FX1N Series Programmable Controllers Installation Notes 3.
3-6
*2 Perform dielectric withstand voltage and insulation resistance tests at the stated voltage
between each terminal and the main unit’s ground terminal.
*3 Ground the PLC independently or jointly.
*4 Do not use the PLC under pressure higher than the atmospheric pressure. Doing so may
damage the PLC.
Between terminals
Dielectric strength
Insulation
resistance
Remarks
AC Power
Supply Units
DC Power
Supply Units
Between power supply terminal and
ground terminal
1.5kV AC
for 1 min
500V AC
for 1 min
5M
Ω
or more on
500V DC Megger
−
Between 24V DC service power
supply connected to input terminal
(24V DC) and ground terminal
500V AC
for 1 min
−
Between input terminal (100V AC)
and ground terminal
1.5kV AC
for 1 min
Only input/output
powerd extension
unit/ block
Between output terminal (relay) and
ground terminal
1.5kV AC
for 1 min
−
Between output terminal (transistor)
and ground terminal
500V AC
for 1 min
−
PLC
Other
equipment
PLC
Other
equipment
PLC
Other
equipment
Independent grounding
Best condition
Shared grounding
Good condition
Common grounding
Not allowed