Siemens X-400 User Manual

 

Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches 

78 

C79000-G8976-C186-03 

You require the following tools: 

●  slotted screwdriver with a 2.8 mm wide blade 

●  slotted screwdriver with a 5.5 mm wide blade 

When removing a twisted pair extender from an S7-300 rail, the basic device re-
mains in position. Follow the steps below: 

1.  To remove an extender module, remove the two covers on the extender. 

2.  Using a slotted screwdriver with a 5.5 mm wide blade, open the captive screw 

between slots 12 and 13 in the lower part of the extender module. 

3.  Remove the cover from slot 11 of the basic device. 

4.  Use a slotted screwdriver with a 2.8 mm wide blade to loosen the two captive 

slug screws on slot 11 of the basic device in the upper and lower recesses as 
far as they will go. 

5.  Push the extender module slowly to the right while keeping it straight until the 

two guide bolts of the extender module are completely outside the holes in the 
basic device. 

6.  Pull out the lower part of the extender module slightly towards the front and lift 

it from the S7-300 rail. 

7.  Replace the right side panel of the basic device so that the guide bolts fit into 

the two holes in the basic device. 

8.  Using a slotted screwdriver with a 2.8 mm wide blade, tighten the two captive 

slug screws on slot 11. The screws lock the two guide bolts, so do not use ex-
cessive force when tightening them. 

9.  Fit a suitable cover on slot 11 of the basic device. 

 

 

Note 
The basic device must not be used permanently without the right side panel.