Siemens SIMATIC PANEL PC 877 - Manual (Page 48)

Connecting
6.3 Connecting the 24 V DC power supply
SIMATIC Panel PC 877
6-6
Operating instructions, Release 07/2006, A5E00877780-01
6.3
6.3
Connecting the 24 V DC power supply
General connection information
Note the following in order to operate the device safely and according to regulation:
Notice
Power supply
The device must only be connected to 24 V DC power supply systems or 24 V DC power
supplies which meet the requirements of a safe extra-low voltage (SELV).
Use the supplied connector to connect it to the supply voltage.
Notice
Connecting the protective conductor
A protective conductor must be connected to the device. The conductors must withstand the
short-circuit current of the 24 V DC power source, so that a short-circuit will not damage the
cable. You may use cables with a cross section of 5 mm 2 .
Connecting the power supply
Steps for connecting the device to the 24 V DC power supply
1 Ensure that the ON/OFF switch is in the '0' (OFF) position to
prevent unintentional startup of the device when connecting it to the
24 V DC power supply
2 Switch off the 24 V DC power supply
3 Connect the 24 V DC power supply to the screw terminals:
(1) +24 V DC
(2) 0 V DC
(3) protective ground conductor
Power consumption
The maximum DC power consumption is 265 W.