Installation manual

Figure 4

For such case, the best way is adding a RS485 distributor. This product can effectively change the star-shape connection to

which satisfies the requirement of RS485 industry standard, in order to avoid those problems and improve the communication

reliability. Show as figure 5.

1. FAQ of RS485 Bus

Fault Phenomenon Probable Cause Solutions

The speed dome do

the self chack but an

not be controlled

1. The address or Baud Rate is not matched bet-

ween Host and the speed Dome

1. Adjust the address or Baud Rate of Host or

Speed Dome to make a match

2. RS485+, - are connected incorrectly 2. Change the RS 485+ and RS485- wires

3. Wiring drops 3. Fastening the wire

4. RS485 wire broke: 4. Change RS485 wire

The speed dome can

be controlled but not

smoothly

1. Loose contact of RS485 1. Fastening RS485 wire

2. One RS485 wire broke 2. Change RS485 wire

3. Host and speed dome are too far away 3. Add terminal matched resistance

4. Too many speed domes are connected 4. Add RS485 distributor