Product Summary

1, the interface features: interface compatible with the EIA/TIA RS - 232 c. RS - 485 / RS - 422 standard 2, electrical interface: RS - 232 - c interface pass of the DB9 connector, RS - 422 / RS - 485 interface four terminals 3, the transmission medium, twisted pair or shielded wire 4, works: asynchronous half-duplex asynchronous full duplex or 5, indicator: three signal indicator indicating TD, RD and PWRS