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FL SWITCH MM HS
2-12
PHOENIX CONTACT
6874_en_16
Redundant 24 V DC
supply
Figure 2-18
Supplying the system using two voltage sources
2.7.3
Alarm contact
The switch has a floating alarm contact. An error is indicated when the contact is opened.
Figure 2-19
Basic circuit diagram for the alarm contact
The indicated error states are configured in web-based management or via SNMP. For a list
of error states that can be configured, please refer to Section ""Diagnostics/Alarm Contact"
menu" on page 4-37.
U S 1
U S 2
F a i l
R e s e t
M O D E
A C T
1 0 0
F D
F L S W I T C H M M H S
O r d . N o . 2 8 3 2 3 2 6
U S 2
U S 1 G N D
G N D
R 1
R 2
0 0 A 0 4 5 1 B D D
M A C
A d d r e s s
V . 2 4
N E F
1 - 3
2 4 V D C
- +
N E F
1 - 3
- +
R 1
R 2
6 7 8 4 0 0 1 5
In the event of non-redundant power supply, the switch indicates a supply voltage failure
by opening the alarm contact. This error message can be prevented by connecting the
supply voltage to both terminals in parallel, as shown in Figure 2-15 or Figure 2-17 (for GL
on the MMS), or by deactivating redundant power supply monitoring in web-based
management.
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-14178-Phoenix-Contact-2832357-FL-IF-2TX-VS-RJ-D-Media-Module-for-Modular-Switch.aspx