UTC TruVision IP Dome Manual de usuario Pagina 18

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1BChapter 2: Installation
12 TruVision DVR 60 User Manual
Camera Switch setting
Legend Protocol switches: 1
Address switches: Select the
camera ID
DIP switch
address as
required.
RS-485 data connector:
Wiring the keypad
The keypad uses RS-485 simplex wiring. The signal is transferred by a single
twisted pair line. A shielded STP CAT5 network cable is recommended. Ground
one end of the cable, either the first or last device on the RS-485 line.
The maximum number of devices that can be installed in one bus is 255, with a
maximum cable length of 1200 m. The cable length can be expanded using a
signal distributor.
Both the first and the last device in series should be terminated with 120 Ohm
resistance to minimize line reflections. See Figure 3 on page 13.
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