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Types of installation
You have the following options when connecting devices:
● You can connect the devices and mount them together on a DIN or S7 standard rail.
● You can mount a device on a DIN or S7 standard rail and expand it later.
Note
For mounting on a rail as well as for removing from the rail, plan enough space between
the devices, see section "Dimension drawings (Page 51)".
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.
Extender for SCALANCE XM-400
Operating Instructions, 09/2018, C79000-G8976-C332-08
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Installation
5.6 Fitting an extender
39
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