JVC DM-NC40 Instructions Manual page 10

Names and Operations of Parts
Back (Continued)
M [ALARM] Alarm port (Dsub 15-pin, female)
Input terminals for alarm signals, and output terminals
for device control.
( See "Alarm Port", page 18)
( See "ALARM SETUP screen", page 37)
N [RS485/RS232C] Protocol select switch of Serial
Port 1
Selects the protocol of O SERIAL 1 port.
RS485: Performs input/output using signals with
electrical properties that comply with EIA/
ITA RS-485.
RS232C: Performs input/output using signals with
electrical properties that comply with EIA/
ITA RS-232C.
(Factory setting: RS232C)
O [SERIAL 1] Serial Port 1 for device control
(Dsub 9-pin, male)
Used to connect to an external control device such as
a remote control unit, etc.
The signal protocol can be selected using the N RS485/
RS232C select switch.
The unit is equipped with a pass-through feature for
remote control via network.
10
@3
ALARM
AUDIO
IN OUT
AC IN
L
R
RESERVED
@4 @5
SERIAL 1
RS485 RS232C SERVICE
VIDEO VIDEO
IN 1
OUT
LOOP
THRU
OPEN
P [SERVICE/CONTROL] Protocol select switch of
Serial Port 2
Selects the protocol of Q SERIAL 2 port.
SERVICE: Only used during servicing. Do not use
this setting.
CONTROL: Performs input/output using signals with
electrical properties that comply with EIA/
ITA RS-232C.
(Factory setting: CONTROL)
Q [SERIAL 2] Serial Port 2 for device control
(Dsub 9-pin, male)
Used to connect to an external control device such as
a remote control unit, etc.
The unit is equipped with a pass-through feature for
remote control via network.
(Continued)
@6 @7
SERIAL 2
CONTROL
VIDEO
IN 2
LOOP
100BASE-TX
THRU
OPEN