Mounting   
4.2 Installing on an S7-300 standard rail 
  SCALANCE W774-1/W734-1 
16  Operating Instructions, 09/2015, C79000-G8976-C325-06 
 
Installing on an S7-300 standard rail 
Procedure 
 
Danger of injury by falling objects 
When used in an area with heavy load, the device is not adequately supported on an S7-
300 standard rail. Under such conditions, the device can come out of the mounting. 
If you use the device in a heavy load area, mount it on an S7-1500 mounting rail or on the 
wall. 
 
Follow the steps below to fit the SCALANCE W774/W734 to an S7-300 standard rail: 
1.  Place the device on the upper edge of the S7-300 standard rail as shown in the figure. 
2.  Screw the housing to the S7-300 standard rail. The required screw ships with the 
SCALANCE W774/W734.