D-Link DAS-3248DC_revC Leaflet

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Alarm I/O:
Connections:
Alarm input could connect to such "fire alarm", "door open alarm" ...etc.
Alarm output could connect to "Speaker", "alarm LED" ...etc.
Description for each contact:
NA, NA, CO1, NO1, NC1
Reply: NA = no used, it is empty pin/socket.
When the DSLAM alarm = 0, CO1 and NC1 is short.
When the DSLAM alarm = 1, CO1 and NO1 is short.
Circuits:
By default configuration, 4 x alarm input are opened, and CO1 and NC1 are short with alarm 
output.
Voltages:
The maximum current and voltage for alarm module of DAS3series_RevC is restricted to 2A 
24VDC or 1A 120VAC (resistive load).