|
The
RS485
is a half-duplex communication standard. The data is transferred in both
directions via one pair of wires. To interconnect JHxxxx series of
products (except JH1000), the data cable should be constructed as shown below.
|
RS485
port A |
|
RS485
port B |
RJ45
plug |
|
|
Signal |
Pin |
|
Pin |
Signal |
|
|
|
Tx+/Rx+ |
1 |
|
1 |
Rx+/Tx+ |
|
|
Tx-/Rx- |
2 |
|
2 |
Rx-/Tx- |
|
The
RS422
is a full-duplex communication standard. The data is transferred in each
direction via separate pairs of wires. To interconnect JHxxxx series of
products, the data cable should be constructed as shown below .
|
RS422
port A |
|
RS422
port B |
RJ45
plug |
|
|
Signal |
Pin |
|
Pin |
Signal |
|
|
|
Tx+ |
1 |
|
8 |
Rx+ |
|
|
Tx- |
2 |
|
7 |
Rx- |
|
|
Rx- |
7 |
|
2 |
Tx- |
|
|
Rx+ |
8 |
|
1 |
Tx+ |
|
|
