Connecting The Grounding; Connecting The Functional Ground (Xr-300M Eec); Grounding Of The X-300Eec - Siemens SCALANCE X320-3LD FE Operating Instructions Manual

Connecting

6.4 Connecting the grounding

6.4 Connecting the grounding
6.4.1

Connecting the functional ground (XR-300M EEC)

Installation on a DIN rail
The device is grounded over the DIN rail.
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
screw-on 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
screw-on bolts on the rear of the device.
6.4.2

Grounding of the X-300EEC

Functional ground
With the devices X-300EEC and XR-300M EEC 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 X-300EEC and XR-300M EEC
with 24 to 48 VDC, functional ground must be connected to the grounding bolts or the
mounting brackets (XR-300M EEC). On the X-300EEC, the functional ground is on the
bottom of the device, on the XR-300M-EEC on the side.
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, 05/2016, A5E01113043-20
SCALANCE X-300