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The table below shows the assignment of the SFP transceivers to the specified groups.
Category
SFP
SFP+
6.7
Signaling contact
The signaling contact is an event-driven or manually controlled failsafe alarm relay. Individual
alarms can be configured to trigger the relay when the associated event occurs. The relay can
also be fixed in an open or closed state.
Manually controlling the relay may be useful to:
• Verify the failsafe relay is properly connected following the installation of the device
• Verify the open/close state is caused by the device itself or some other hardware
• Keep the relay in an open/close state while troubleshooting a network issue
Information on the signaling contact
• The signaling contact is a floating switch that signals error states by interrupting the contact.
If an error occurs, the signaling contact opens. In normal operation, the signaling contact is
closed.
• The signaling contact is connected using a 2-pin plug-in terminal block (spring-loaded
terminal). The terminal block is included in the scope of delivery of the device and can be
ordered as a spare part, see section "Spare parts (Page 29)".
SCALANCE XRH-300/XRM-300
Equipment Manual, 10/2022, C79000-G8976-C546-01
Group
Group 1
Group 2
Group 1
Group 2
Type
SFP991-1
SFP991-1 (C)
SFP991-1LD
SFP992-1
SFP992-1LD
SFP992-1LD (C)
SFP991-1LH+
SFP991-1ELH200
SFP992-1+
SFP992-1LD+
SFP992-1LH
SFP992-1LH+
SFP992-1ELH
SFP992-1BXMT
SFP992-1BXMR
SFP992-1BX10T
SFP992-1BX10R
SFP993-1
SFP993-1LD
SFP993-1LH
Connecting up
6.7 Signaling contact
Article number
6GK5 991-1AD00-8AA0
6GK5 991-1AD00-8FA0
6GK5 991-1AF00-8AA0
6GK5 992-1AL00-8AA0
6GK5 992-1AM00-8AA0
6GK5 992-1AM00-8FA0
6GK5 991-1AE00-8AA0
6GK5 991-1AE30-8AA0
6GK5 992-1AG00-8AA0
6GK5 992-1AM30-8AA0
6GK5 992-1AN00-8AA0
6GK5 992-1AP00-8AA0
6GK5 992-1AQ00-8AA0
6GK5 992-1AL00-8TA0
6GK5 992-1AL00-8RA0
6GK5 992-1AM00-8TA0
6GK5 992-1AM00-8RA0
6GK5 993-1AT00-8AA0
6GK5 993-1AU00-8AA0
6GK5 993-1AV00-8AA0
71
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