Sena PS100 User Manual page 64

Data-(1)
120 Ω
HelloDevice
Data+(9)
Tx-(1)
120 Ω
Tx+(9)
HelloDevice
Rx-(3)
120 Ω
Rx+(4)
RS485
Data- Data+
...
Device
1
Figure A-6 RS485 wiring diagram
RS422
Rx- Rx+ Tx- Tx+
...
Device
1
Figure A-7 RS422 wiring diagram
64
Data-
120 Ω
Data+
Data- Data+
Device
N-1
Rx-
120 Ω
Rx+
Tx-
120 Ω
Tx+
Rx- Rx+ Tx- Tx+
Device
N-1
Device
N
N=max 31
Device
N
N=max31