LEDs, connectors, buttons 
  2.4 X80: External power supply 
IE/PB LINK PN IO 
Operating Instructions, 11/2017, C79000-G8976-C393-02 
27 
For information on configuring the bus adapters in STEP 7 Professional refer to the section 
Configuring bus adapters (Page 59). 
 
Note 
Deactivated Ethernet interface 
When you plug in a bus adapter, the ports X1P1R
 / X1P2R of the integrated Ethernet 
interface of the LINK are deactivated.
 
 
Do not press the button if there is a potentially explosive atmosphere. 
The button serves the following purposes: 
●  Changeover to maintenance mode 
●  Restart 
After the restart a new firmware file can be loaded, see section Loading firmware 
(Page 71). 
●  Resetting to factory settings 
For information on using the button and changing to the maintenance mode see the following 
section. 
 
X80: External power supply 
External power supply 
The connector X80 (socket) for the external 24 VDC power supply is located on the bottom 
of the LINK. The external power supply is redundant (optional use). 
The power supply is connected to the LINK with the supplied 4-pin plug-in terminal block. 
The plug-in terminal block is designed so that it can only be inserted in one position in the 
X80 socket of the LINK. 
The connector X80 has electronic reverse polarity protection.