Hardened PoE Ethernet Switch
17
Alarms for Power and Port Link Failure
Step 1: There are two pins on the terminal block are used for power failure
detection. It provides the normally closed output when the power
source is active. Use this as a dry contact application to send a
signal for power failure detection.
Power Input Assignment
＋
48VDC
Power2
－
Power
Ground
＋
48VDC
Power1
－
Power
Ground
Earth
Ground
Terminal
Block
Relay Alarm Assignment
FAULT
*Relay warning signal disable for
following:
The relay contact closes if Power1
and Power2 are both failed but
Power3 on.
The relay contact closes if Power3
is failed but Power1 and Power2
are both on.
Special note:
The relay output is normal open position when there is no power to the
switch. Please do not connect any power source to this terminal to
prevent the shortage to your power supply.
