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Last modified by Theodore Xu on 2024/04/10 09:11
From version 1.1
edited by Theodore Xu
on 2023/11/27 17:12
Change comment: There is no comment for this version
To version 2.1
edited by Theodore Xu
on 2023/11/27 17:17
Change comment: There is no comment for this version

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... ... @@ -7,7 +7,7 @@
7 7  |(% colspan="2" %)Topological structure|Bus type
8 8  |Slave station function|Number of messages that can be received and requested at the same time|1
9 9  
10 -**2. Hardware configuration**[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml8080\wps1.png]]
10 +**2. Hardware configuration**
11 11  
12 12  |Terminal identification|Terminal name|Function description|Jumper/dialing position
13 13  |J5|485 communication terminal resistance setting jumper|Match terminal resistance|(((
... ... @@ -29,13 +29,26 @@
29 29  
30 30  When the number of nodes is large, 485 bus must be daisy chain connection. If branch connection is needed, the branch length from bus to node had better be short. It is recommended that it should not exceed 3m. **Star connection should be forbidden**. The diagram of common bus structure is as follows:
31 31  
32 +Figure1 Daisy chain connection
33 +
32 32  (% style="text-align:center" %)
33 33  [[image:菊花链接.png||alt="Daisy chain connection"]]
34 34  
37 +Figure2 Branch connection
35 35  
36 36  (% style="text-align:center" %)
37 37  [[image:分支链接.png]]
38 38  
42 +Figure3  Star connection **(Forbidden) **
43 +
39 39  (% style="text-align:center" %)
40 40  [[image:星型链接.png]]
41 41  
47 +
48 +**Transmission distance**
49 +
50 +The maximum number of nodes and transmission distance supported by our standard RS485 circuit at different rates are shown in the following table.
51 +
52 +|Transmission distance (m)|Rate (kbps)|Number of nodes|Wire diameter
53 +|100|115.2|128|AWG26
54 +|1000|19.2|128|AWG26