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Alarm Contact
The 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 on page 6. 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 occurs, the Fault circuit will be closed.
DIP Switch Settings
ON DIP
123
4
5
2
1
----
BSP
PORT
ALARM
ON
OFF
P1
P2
P3
P4
P5
OFF
ON
The default setting for each DIP switch is OFF. The
following table explains the effect of setting the
DIP switches to the ON positions.
DIP Switch
Setting
Description
ON
Enables broadcast storm protection
BSP
OFF
Disables broadcast storm protection
ON
Enables jumbo frame function
----
refers to Jumbo
Frame
OFF
Disables jumbo frame function
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.
PORT Alarm
OFF
Disables the corresponding PORT Alarm.
The relay will form a closed circuit and the
Fault LED will never light up.
ATTENTION
To actively update DIP switch settings, power off and then power
on the EDS.
