Interlogix TruVision DVR 20 User Manual page 18

49BChapter 2: Installation
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 below.
Figure 7: RS-485 bus serial wiring with connector boxes
1. KTD-405 keypad
2. I/O box
Use an RS-485 signal distributor for a star wiring configuration. See Figure 8 on
page 15.
14
3. TVR 20
3. TVR 20
4. Connector box
TruVision DVR 20 User Manual