Installing and connecting the device
3.3 Connecting the device
SIMATIC IPC547D
Operating Instructions, 06/2011, A5E03473780-01
35
Procedure - connecting redundant power supply
1.
Turn off both on/off switches
①
.
2.
Connect a power cable to the two sockets
④
.
3.
Turn on the two on/off switches
①
.
The LEDs on the power supply modules
②
light up green.
Note:
If only one of the power supply modules
works, a warning signal sounds. You turn off
the warning signal by pressing the
③
button
on the working power supply module.
Securing the power plug of the redundant power supply
To prevent unintentional removal of the power cable, you can secure the power plug as
follows:
1.
Remove the retaining screws
①
.
2.
Screw on the latch for the power plug
②
.