Siemens X-400 User Manual

Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches 
C79000-G8976-C186-03 

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6.  Push the extender module slowly to the left while keeping it straight and with-

out skewing and check that the two guide bolts on the extender fit into the 
holes in the basic device. Then push the extender module to the left as far as it 
will go so that it is flush with the right side of the basic device. 

7.  Using a slotted screwdriver with a 5.5 mm wide blade, tighten the captive 

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

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 the CV490 4x100 cover to slot 11 of the basic device and slots 12 and 13 of 

the twisted pair extender. 

 

 

 

Figure 6-4 

Installing the twisted pair extender on the S7-300 rail