Siemens SIMATIC NET SCALANCE XM-400 Operating Instructions Manual page 52

Installation
5.6 Fitting an extender
Fitting and removing an extender
Fitting an extender
To fit an extender, follow the steps below:
1. Remove the cover of the expansion interface on the basic device.
2. Fit the two devices together so that the two centering pins are accommodated by the
opposing openings
3. Press the devices together until they are flush.
The centering pins click audibly into place. The locking device is automatically pressed up
briefly as this happens.
Removing an extender
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Operating Instructions, 09/2018, C79000-G8976-C306-08
SCALANCE XM-400