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.
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 PoE
52
Compact Operating Instructions, 03/2022, A5E02661178-15
