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FL SWITCH SFN…
6.4
Alarm Contact
The FL SWITCH SFN… switch provides contacts (R1, R2)
for remote alarms if a failure is detected.
– The contact closes if one or both power supplies fail.
– The contact opens if power is OK.
The maximum current, including inrush, is 100 A.
+
–
6.5 Ethernet Interface
The FL SWITCH SFN… has five Ethernet ports on the front
in RJ45 format to which only twisted-pair cables with an
impedance of 100 Ω can be connected. The data
transmission speed is 10/100 Mbps. In addition, every port
has an auto crossing function: it is not necessary to make a
distinction between 1:1 or crossover Ethernet cables.
US1 GND US2 GND R1
R2
10/100 Mbps
RJ45
10/100/1000 Mbps
RJ45
Figure 4
FL SWITCH SFN…GT… power connections
for single power supply
8 7 6 5
n.c. TD-
n.c. n.c.
Figure 6
4 3 2 1
n.c. RD-
TD+ RD+
RJ45 pin assignment
8 7 6 5
DD- DB-
DD+ DC-
4 3 2 1
DC+ DA-
DB+ DA+
+
–
+
–
6.6
Fiber Optic Connection
Two different types of fiber optic connection are available.
The fiber optic connector(s) are located on the lower front
face of the 8-port models or on the bottom face of the 5-port
models.
The ST connectors are typically individual round connectors
and use a 1/4-turn connection.
US1 GND US2 GND R1
R2
Figure 5
FL SWITCH SFN…GT… power connections
for redundant power supply
Use power conductors between 0.2 - 2.5 mm2
(24 - 12 AWG). Torque connection screws to 0.5 - 0.6 Nm
(5 - 7 lb-in.).
2732_en_D
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