AD485A Datasheet – RS‐232 to RS‐485 Passive Converter

Part Number: AD485A

Function: RS‐232 to RS‐485 Passive Converter

Manufacturer: Unspecified


AD485A datasheet



In order to communicate between various standard series ports of computers, external equipments, or intelligent instruments, we must convert these signals first. The converter is
compatible with RS‐232C and RS‐485 standard.

It is able to convert RS‐232 signal to RS‐485 balanced differential signal and extend the communication distance to 1.2KM.It is passive and doesn’t require



Used to convert RS-232 to RS-485
Port protection: 600W surge protection 15Kv static protection
Port powered no external power supply required


Interface: Conforms to ETA/TIA RS-232C RS-485 standards
Interface RS232 side: DB9 female connector
Interface RS485 side: DB9 male connector with optional terminal board
Working mode: asynchronous, half-duplex, differential transmission
Transmission media: common wire, double wire or UTP or Shielding Line
Transmission rate: 300 – 115200bps
Transmission distance: RS485 max. 1200m, RS232 side max. 5m.
Telecommunication agreement: Transparent
Signals: RS-232: TXD, RXD, RTS, CTS, DTR, DSR, DCD, CND, RS-485: Date+, Date-, GND.
Operating Environment: -40°C to +85°C


Other data sheets are available within the file: AD485-A, AD485-C, AD485

AD485A Datasheet PDF Download

AD485A pdf