Siemens PANEL PC 877 Manual De Usuario

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.