Wiring The Ktd-405 Keypad - GE TruVision DVR 20 User Manual

Camera Switch setting
Legend Protocol switches
Address switches

Wiring the KTD-405 keypad

The KTD-405 keypad uses RS-485 simplex wiring. The signal is transferred by a single
twisted pair line. An unshielded CAT5 network cable is recommended for normal
applications. Use a shielded CAT5 cable if the cables could be exposed to
interference.
The maximum number of TVR 20s that can be installed in one bus is 31, with a
maximum cable length of 1200 m. Both 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 6 below.
Figure 6: RS-485 bus serial wiring
1. KTD-405 keypad
2. I/O box
The cable length from box to device cannot exceed 2 m when using connector boxes.
See Figure 7 on page 14.
TruVision DVR 20 User Manual
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3. TVR 20
49BChapter 2: Installation
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