Mitsubishi FX3UC SERIES User Manual page 141

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
WIRING PRECAUTIONS
• Do not touch any terminal while the PLC's power is on.
Doing so may cause electric shock or malfunctions.
• Before cleaning or retightening terminals cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
• Make sure to connect the battery for memory backup correctly.
Do not charge, disassemble, heat, short-circuit, or expose the battery to fire.
Doing so may rupture or ignite it.
5 Input Specifications and External wiring
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