NVS440 User’s Guide
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2.3.2. Rear panel
Figure 2-2. Rear Panel of NVS440
Ethernet
: 10/100 Mbps Ethernet connector (RJ-45).
Line/Mic In:
They are used to connect external audio source or microphone to NVS440. There are 4
Line/Mic. In connectors.
Use Standard stereo earphone jack for the connection.
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Line Out
: It is used for connecting external speakers with built in amplifier. Audio from remote site is
output through Line out in bi-directional audio mode.
Use Standard stereo earphone jack for the connection.
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Video1- Video4 :
4 Video input (composite NTSC, PAL, SECAM)
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Terminator
: Enable termination by 75 Ohm resister for each video input when switched on.
Leave the terminator to ON position when no other device is sharing the same
video line. In other words, if the NVS440 is not the last device in the video bus network,
disable termination, otherwise enabled termination if it is the last device.
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Reset
Button
:
Used for resetting the NVS440 to default factory parameters. The
Button is a pin-hole
located between Video4 and RS-485 connector. Use a pointed tool to
press the button for 3 seconds and release. Shown in Figure 2-2
circled in red.
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RS-485 and RS-232 interface
: Used for interfacing of Pan, Tilt, and Zoom (P/T/Z) devices
The pin assignments for the shared interface are as follows:
Pin 2 – RS-232 In
Pin 3 – RS-232 Out
Pin 5 – RS-232 GND
Pin 8 – RS-485 Negative (-) input
Pin 9 – RS-485 Plus (+) input
(Either one type of RS-485 or RS-232 interface can be used at one time.)
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Relay output
: U
sed for interfacing external alarm generators such as sirens, beacons, or alert
equipments. When activated, the relay output interface provides a close circuit path which
shorts the two terminals providing a complete electrical path. Two Relay output interface, A
