User`s manual

13
The
ALARM IN
can be selected as normally open input or normally closed input:
Normally Open
:
If the alarm input is selected as Normally Open input, then the
(N.O.)
input is opened normally and shorted to the ground means an alarm
happens.
Normally Closed
:
If the alarm input is selected as Normally Closed input, then the
(N.C.) input is shorted to the ground normally and opened means an alarm
ha
pp
ens.
2.2.2 ALARM RESET
External alarm reset signal is used to reset the alarm and turn the buzzer off. If it is
selected as Normally Closed input, then the input is shorted to the ground normally.
Furthermore, it is opened when an alarm reset signal comes in. If it is selected as
N
ormally Open input, then the input is opened normally. Also it is shorted to the
ground when an alarm reset signal comes in
.
3. RS232 Connection
EverPlex 4CQ may be controlled by a computer or a terminal via the standard 9 pin D-
sub/RS232 connector, which is connected to the alarm I/O by a cable with 15 pin and 9
p
in connectors. The Processor will send the alarm message to the host via RS232 when
an
y
alarm occurs.
5
ALARM I/O
DC12V
AC24V
VIDEO INPUT
IN OUT OUT
VCR
MONITOR
15-PIN MALE
CONNECTOR
9-PIN FEMALE
D-SUB CONNECTOR
69
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