Siemens SCALANCE XR-300M Compact Operating Instructions page 33

Normal orientation
Normal orientation of the device
● The LED display is on the left of the front panel of the housing.
● To the right of the LED display, the SCALANCE XR-300 has
connectors for the signaling contacts and the power supply.
Note that the SCALANCE XR-300 is available for different
power supplies (100 to 240 VAC and 24 VDC variants).
● The Ethernet ports or the slots for the modules are also on the
front of the housing. Slots for the modules are fitted with
dummy covers.
● The C-PLUG is on the right behind a protective panel secured
with screws.
(For more detailed information, refer to the section on the C-
PLUG in the X-300 operating instructions.)
● The ventilation grilles are on the top, bottom and sides of the
housing.
● On the back of the housing, you will find the diagnostics port
of the device. (For more details, refer to Diagnostics port
XR-300.) On the SCALANCE X-300M EEC, you will also find
the connectors for the signaling contacts and power supply
here.
19" rack mounting with normal orientation
19" rack mounting
1. Select the required rack device (R) and the 19" cabinet.
2. Fix the two mounting brackets with 4 screws each to the
sides of the housing. The maximum tightening torque for
these screws is 0.5 Nm.
CAUTION: If you install a rack device (R) with compo‐
nents inserted.
The locking mechanisms of components installed in the
rack device (R) (for example the handles of media mod‐
ules or the clips on the SFP) must be closed.
See also installation of modular devices:
- Installing media modules in a slot
- Installing an SFP in an SFP media module.
SCALANCE XR-300M
Compact Operating Instructions, 11/2019, A5E02661171-15
Mounting
5.3 19" rack mounting
33