
24
c Connect an external speaker with amplifier to
the audio output connector (for use of the audio
transmission function).
SF549
SF539
Connect a stereo mini plug (ø3.5 mm) (audio
output is monaural).
• Recommendedcablelength:10m
{33 feet} or less
v Connect the cables of external devices to the
EXT I/O terminal plug (accessory).
q When connecting an external device, remove
8 mm - 9 mm {5/16 inches - 11/32 inches} of
the outer jacket of the cable and twist the cable
core to prevent the short circuit first.
Specification of cable (wire):
20 AWG - 26 AWG, Single core, twisted
w Push down the button of the desired terminal
on the external I/O terminal plug with a ballpoint
pen, and release the button when the cable of
the external device is fully inserted into the ter-
minal hole.
* Check whether the stripped part of the wire is
not exposed and is securely connected.
8 mm - 9 mm
{5/16 inches - 11/32 inches}
4
3
2
1
External I/O terminal plug
(accessory)
Button
connector
Specication of external I/O terminal plug (accessory)
SF549 SF539
1234
ALARM IN3, AUX OUT
(Alarm input terminal 3, AUX output terminal)
GND
ALARM IN1, DAY/NIGHT IN
(Alarm input terminal 1, DAY/NIGHT input terminal)
ALARM IN2, ALARM OUT
(Alarm input terminal 2, Alarm output terminal)
Specication of external I/O terminal plug
(accessory)
SF548
1234
AUX OUT (AUX output terminal)
GND
ALARM IN (Alarm input terninal)
ALARM OUT (Alarm output terminal)
SF538
IMPORTANT:
• Connect/disconnecttheaudiocablesandturnonthepowerofthecameraafterturningoffthe
power of the audio output devices. Otherwise, loud noise may be heard from the speaker.
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