Quick Eagle Networks DL3800E - Manual (Page 131)

Specifications A-5
A
The External alarms are used to turn on a Bell or Light to indicate that an
alarm has occurred on the DL3800E. Either the Major, Minor, or both can be
wired to the DB-9 Connector on the back.
Normally Open (Major or Minor) – The Alarm is off when there is an
open on the alarm circuit. Will indicate an alarm when the circuit is closed.
Normally Closed (Major or Minor) – The alarm is off when there is a short
on the alarm circuit. Will indicate an alarm when the circuit is open.
Alarm In – This alarm can be used to indicate to the DL3800E unit that an
external alarm has occurred such as a door opening or closing. This would
require the customer to use a 48V volt supply to drive the alarm.