Dahua Technology DH-IPC-HDEW Series Quick Start Manual page 20

2.4 Cable Preparation
Select the cables depending on the transmission distance.
RS-485 cable requirement: When using the 0.56 mm (24 AWG) twisted-pair line, depending on
different baud rates, the theoretical maximum transmission distance are different. For details, see
Table 2-6 .
Baud Rate
2400 bps
4800 bps
9600 bps
Figure 2-9 External grounding mark
Figure 2-10 Internal grounding mark
Table 2-6 Theoretical maximum transmission distance
13
Maximum Transmission Distance
1800 m
1200 m
800 m
Quick Start Guide