User Manual

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Alarm Contact
WARNING
Exposure to some chemicals may degrade the sealing properties
of materials used in the Sealed Relay Device.
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 7. 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) The PORT ALARM DIP Switch for one of the
ports is set to ON, but the port is not connected properly.
If neither of these two conditions occurs, the Fault circuit will be closed.
DIP Switch Settings
EDS-316 Series DIP Switches
DIP Switch
Setting
Description
Port Alarm
Function
(P1 to P16)
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.
Broadcast
Storm
Protection
(BSP)
ON
Enables the broadcast storm protection (allowed
2000 broadcast packets per second) in the EDS
switch for all ports.
OFF
Disables the broadcast storm protection.
NOTE
The EDS-316 has a total of 18 DIP switches; 1 DIP switch is
reserved.
LED Indicators
The front panel of Moxa EtherDevice Switch contains several LED
indicators. The function of each LED is described in the table below.