Port-Power RS232 to RS485/422 Converter

The IT-SC485C-SW is an industrial grade bi-directional port-powered RS232 to RS485 or RS422 converter in a 9 pin format. It can convert any standard full duplex RS232C port to any two-wire balanced half duplex RS485 port or four-wire balanced full duplex RS485 or RS422 port. In simple terms, it will convert any RS232 signal to a RS485 or RS422 signal and vice versa.  The unit is powered from the RS232 data lines. It also supports data direction auto-turnaround. Therefore, no external power or flow control is required. The data direction auto-turnaround automatically enables the RS485/RS422 driver when data is present on the RS232 side making the device plug-and-play, requiring no software drivers. The IT-SC485C-SW has a DB9 female connector on the RS232 side and either a DB9 male connector or 5 bit terminal block on the RS485/RS422 side.




  • Plug-and-Play, small volume, easy installation
  • Port-powered, high efficiency obtain electricity, can also worked on 3 lines
  • RS-232 to RS-485 or RS-232 to RS-422
  • Lowest consumption
  • Automatic send data control, auto distinguish and sense direction adopt data transfer
  • Auto sense serial signal rate, zero delay automatic transmit


Standards: EIA RS-232C, RS-485,RS-422 standard
RS-232 signal: TX, RX, GND
RS-422 signal: T+, T-, R+, R-, GND
RS-485 signal: D+, D-, GND
Working mode: Asynchronism, point to point or multi point, 2 wire half-duplex,4 wire full duplex
Baud rate: 300~115200bps, auto test serial signal rate detect signal speed automatically, zero delay time
Flow control: Data direction auto-turnaround, no flow control is required
Transfer distance: RS-485/422 side: 1.2Km, 115200bps
RS-232 side: no less than 5m
Max number of drops: 128 nodes
Optical isolation: 2500V
Port protect: 1500W surge protection,15KV ESD protection
Connector: RS-232 side DB9 female
RS-485/422 side DB9M( DB9F to 5 bit terminal block)
Power input: No power supply need, powered from TXD, RTS,DTR
Consumption: Static less than 10mA, dynamic less than 40mA
Operating temperature: -40°C to 80°C
Storage temperature: -40°C to 85°C
Humidity: 5% to 95%(no condensation)
Dimensions: 95.0mm×33.0mm×16.5mm
Material: Plastic(shell)
Weight: 50g
Warranty: 3 years
Approvals: FCC,CE,RoHS approvals


Product Datasheet

Intellisystem Technologies