Siemens SCALANCE X-400 Operating Instructions Manual page 83

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 13 and 14 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 on slot 11 of the basic device. Make sure that the
media module terminal strips of slots not occupied by media modules have
protective caps fitted and that the CV490 2x100 covers are in place.
Figure 6-6
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
C79000-G8976-C186-03
Installing the media module extender on the S7-300 rail
Installation and Commissioning
83