Technical data
FL SWITCH SFN ...
7267_en_01 PHOENIX CONTACT 10
Supply Voltage Connection and Grounding for 10/100 Mbps Versions
Supply Voltage
The switch is designed for SELV operation at +24 V DC ac-
cording to IEC 950/EN 60950/VDE 0805. Only SELV ac-
cording to the defined standards may be used for supply
purposes.
Connection to Functional Earth Ground
Snapping the switch onto a grounded DIN rail connects it to
the ground potential. In an environment particularly prone
to EMI, noise immunity can be increased by an additional
low-impedance connection to functional earth ground via
terminal 3 or 4.
Figure 5 Example for supply of a 10/100 Mbps module
Supply Voltage Connection and Grounding for 10/100/1000 Mbps Versions
Supply Voltage
The switch is designed for SELV operation at 24 V DC according to IEC 950/EN 60950/VDE 0805. Only SELV according
to the defined standards may be used for supply purposes.
Figure 6 Supply of a 10/100/1000 Mbps module from one or two voltage sources
Alarm Contact Operation
– One or more power supplies failed -> the contact clos-
es
– Power OK -> the contact opens
The maximum current, include inrush, is 100 mA.
1 2 3 4
24 V DC
+ -
US
GND
Operate the module using a +24 V DC SELV. The module is fully operational even with only one supply voltage
(without jumpering it to other supply voltage terminal blocks) and/or without wiring the alarm contact
(see Figure 6, A).
US1
GND
1 2 3 4 5 6
24 V DC
+ - + -
US2
GND
R1 R2
US1
GND
1 2 3 4 5 6
24 V DC
US2
GND
R1 R2
BA
72670008