Siemens Simatic CFU Commissioning Manual page 40

Connecting
7.3 Connecting the power supply to the CFU
Note
Diagnostics of the redundant power supply
Diagnostics can be enabled for the redundant power supply in the commissioning wizard of
the CFU. You can find information on this in section "Using a wizard for CFU configuration
(Page 55)".
Requirements
● The plugs are available (X80 or X81, section "Article numbers (accessories / spare parts)
(Page 145)").
● Only wire the plugs when the power supply is switched off.
● Observe section "Wiring rules (Page 37)".
Required tools
You need a screwdriver with a 3 mm to 3.5 mm blade width for the following tasks:
● Connecting the power supply for plugs with screw-type terminals
● Disconnecting cables
Fastening the cable to the plug
You can find information on connecting the cables in section "Selecting connection system
(Page 44)".
Slot for the power supply of the CFU
Insert the plug into the CFU (X80 or X81).
Display of the supply voltage
The "PS1" and "PS2" LEDs indicate whether a power supply is connected (see section
"Diagnostics via LED displays (Page 91)"):
● X80: "PS1" LED lights up green
● X81: "PS2" LED lights up green
Removing a wire
Plug with screw-type terminals
1. Open the terminal with the
2. Remove the cable from the plug.
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screwdriver.
Plug with push-in terminals
1. Using the screwdriver, press the spring opener as far as
it will go and pull the cable out the terminal.
2. Pull the screwdriver out of the spring release.
Commissioning Manual, 07/2018, A5E39252870-AC
SIMATIC CFU