Siemens SCALANCE XR-300M, Compact Operating Instructions

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Screw-in grounding bolts Pressed in grounding bolts
④
Washer
⑤
Spring washer
⑥
Nut
Follow the steps below to connect the functional ground:
1. Put the parts
③
,
④
and
⑤
together on the grounding bolt as shown in the drawing.
2. Tighten the nut
⑥
with a maximum tightening torque of 1.5 Nm.
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 Signaling contact
The signaling contact (relay contact) is a floating switch with which error/fault states can be
signaled by breaking the contact.
Error indication
● The signaling by the signaling contact is synchronized with the fault LED, in other words, all
errors displayed by this LED (freely configurable) are also signaled on the signaling contact.
● If an internal fault occurs, the fault LED lights up and the signaling contact opens.
● The connection or disconnection of a communication node on an unmonitored port does not
lead to an error message.
● The signaling contact remains activated until the error/fault is eliminated or until the current
status is entered in the fault mask as the new desired status.
24 V DC signaling contact
Note
Supply voltage at signaling contact for XR-300M and XR-300M-PoE
At the signaling contact, there is always a voltage of 24 VDC even if the device can be operated
with 100 to 240 VAC.
● The signaling contact is connected to a 2-pin plug-in terminal block.
The signaling contact can be subjected to a maximum load of 100 mA (safety extra‑low
voltage SELV, 24 V DC).
Connecting up
6.5 Signaling contact
SCALANCE XR-300M
46
Compact Operating Instructions, 11/2019, A5E02661171-15