Cable Preparation; Minimum Requirements For The Video Cable; Rs-485 Cable Requirement - Dahua ECA7A1 Installation Manual

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2.5

Cable Preparation

Select the cables depending on the transmission distance.

2.5.1 Minimum Requirements for the Video Cable

75Ω impedance.

Pure copper cored cables.

95% braided copper shielding.

For the cables and their maximum transmission distance, see Table 2-4.
Model
RG59/U
RG6/U
RG11/U

2.5.2 RS-485 Cable Requirement

When using the 0.56 mm (24AWG) twisted-pair line, depending on different baud rates, the
theoretical maximum transmission distance is different. For details, see Table 2-5.
Figure 2-7 Installation of explosion-proof flexible tube (2)
Table 2-3 Flexible tube installation (2)
Description
Explosion-proof flexible tube
Outlet hole
Table 2-4 Cables and the maximum transmission distance
Maximum Transmission Distance (m\ft)
229/750
305/1000
457/1500
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Installation Manual