Connecting
5.2 Connecting functional ground
SCALANCE X-300M
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Compact Operating Instructions, 10/2014, A5E02630801-06
5.2
Connecting functional ground
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.
5.3
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.
