Alaxala AX6300S Series Instruction Manual page 183

Step 3
Connect a power cable to the power supply unit. (For details about how to connect a
power cable, see 4.6 Connecting and disconnecting the power cable.)
5. Adding and Replacing Optional Modules
Make sure the circuit breaker of the power supply facility is set to OFF
before connecting or disconnecting the DC power cable. Connecting
or disconnecting the cable with the circuit breaker of the power supply
facility set to ON could result in fire or electric shock.
After connecting the DC power cable, attach the terminal board cover.
Using the power supply unit without the cover could result in electric
shock.
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