Westermo RFR-12-FB - Manual (Page 14)

14 6641-2222
By-Pass functionality
The by-pass functionality in RFR-12-FB secures connection in case of power failure in
one of the switches. If a switch has power loss an internal relay in RFR-12-FB will by-pass
the switch and bridge two Ethernet ports.
By-pass interfaces
In case of power failure X9 will be by-passed to X11 and X10 will be by-passed to X12.
Internally the switch will bypass
X9.1
Connected to
X11.2
X9.2 X11.1
X9.3 X11.4
X9.4 X11.3
X10.1 X12.2
X10.2 X12.1
X10.3 X12.4
X10.4 X12.3
Note! Make sure that the maximum distance between switches will not exceed the
standard (100 m) in case of by-passing one or more switches.
X11
X12
X10
X12
X11
X9
X10
X9
Switch 1 Switch 2 Switch 3