USB to RS485 converter / adapter Convertitore / adattatore USB RS485
Full Duplex (4 wires)
JP1 close 2-3
1.J2 B Tx RS485
2.J2 A Tx RS485
1.J1 B Rx RS485
2.J1 A Rx RS485
4.J1 GND
Half-Duplex (2 wires)
JP1 close 1-2
1.J1 B RxTx RS485
2.J1 A RxTx RS485
4.J1 GND
JP2 = 120R terminator on 1 end 2 of J1
1 end 2 of J1 protectec with termofuse and varisor
3.J1 +5V out (from USB) - Use it with caution.
4.J1 GND