Installation guide

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SC-Port Pinouts SC-Port to SC-Port Cable Wiring
Redundant Power Inputs
Both power inputs can be connected simultaneously to live DC power sources.
If one power source fails, the other live source acts as a backup, and
utomatically supplies all of MOXA EtherDevice Switch’s power needs. a
Alarm Contact
MOXA EtherDevice Switch has one Alarm Contact located on the top panel.
For detailed instructions on how to connect the Alarm Contact power wires to
the two middle contacts of the 6-contact terminal block connector, see the
Wiring the Alarm Contact section above. A typical scenario would be to
connect the Fault circuit to a warning light located in the control room. The
light can be set up to switch on when a fault is detected.
The Alarm Contact has two terminals that form a Fault circuit for connecting to
an alarm system. The two wires attached to the Fault contacts form an open
circuit when (1) EDS has lost power from one of the DC power inputs, or (2)
one of the ports for which the corresponding PORT ALARM Dip Switch is set
to ON is not properly connected.
If neither of these two conditions occur, the Fault circuit will be closed.
Dip Switch Setting
EDS 308 series dip switch
EDS 305 series dip switch
ON: Enables the corresponding PORT Alarm. If the port’s link fails, the relay
will form an open circuit and the fault LED will light up.
Off: Disables the corresponding PORT Alarm. The relay will form a closed
circuit and the Fault LED will never light up.