Instruction manual

5. Adding and Replacing Optional Modules
128
The circuit breaker of the power supply facility must be set to OFF.
Adding or replacing a DC power supply unit with the circuit breaker set
to ON could result in fire or electric shock.
Step 3
Disconnect the power cable from the power supply unit you are replacing. (For
details about how to disconnect the power cable, see
4.6 Connecting and
disconnecting the power cable)
Figure 5-13 Disconnecting the power cable
(1) Power cable
Step 4
Loosen the screws of the power supply unit.