Scalance X-300Eec And Rack Devices - Siemens SCALANCE X-300 Series Operating Instructions Manual

Connecting
6.5 Grounding
S7 standard rail
The device is grounded over its rear panel and the neck of the screw.
Wall mounting
The device is grounded by the securing screw in the unpainted hole.
Please note that IE Switches X-300 must be grounded over one securing screw with minimum
resistance.
If an IE Switch X-300 is mounted on a non-conducting base, a grounding cable must be
installed. The grounding cable is not supplied with the device. Connect the paint-free surface
of the IE Switch X-300 to the nearest grounding point using the grounding cable.
19" rack mounting
● 24 VDC variant:
Grounding is via the mounting bracket on the device or alternatively/additionally via the bolts
on the rear of the device.
● 100 to 240 VAC variant:
Grounding is via the mounting bracket on the device or alternatively/additionally via the bolts
on the rear of the device.
6.5.1

SCALANCE X-300EEC and rack devices

Functional ground
With the devices with a 100 to 240 VAC / 60 to 250 VDC power supply, functional ground must
be connected to the grounding bolts or the power supply terminal of every power supply unit.
With the devices with 24 to 48 VDC, functional ground must be connected to the grounding
bolts or the mounting brackets (XR-300M EEC).
To wire up the functional ground, use a copper cable of category 18-8 AWG or cable with a
cross-section of 0.75 to 6 mm².
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Operating Instructions, 11/2019, A5E01113043-24
SCALANCE X-300