Port-Powered RS232 to RS-485 Converter

The IT-SC485WA-SW is an industrial grade bi-directional port-powered 2500V opto-isolated RS232 to RS485 converter in a 9 pin format. It can convert any standard full duplex RS232C port to any two-wire balanced half-duplex RS485 port. In simple terms, it will convert any RS232 signal to a RS485 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 driver when data is present on the RS232 side making the device plug-and-play, requiring no software drivers. The IT-SC485WA-SW has a DB9 female connector on the RS232 side and either a DB9 male connector or 3 bit terminal block on the RS485 side.




  • Optical isolation effectively protects RS-232/RS-485 devices from transient surges, ground loop, and remote lightning
  • Plug-and-Play (Device is hot-pluggable, Data format Auto-sensing & Self-adjusting)
  • Maximum baud rate 38400bps, 1200m (9600bps)
  • Port-powered, no external power or TXD, RTS, DTR required
  • Data direction auto-turnaround, no flow control is required
  • 2500V isolation, no power supply needed


Standards: EIA RS-232C, RS-485, RS-422 standard
RS-232 signal: TX, RX, GND
RS-485 signal: D+, D-, GND
Working mode: Asynchronism, point to point or multi point, 2 wire half-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 side: 1.2Km, 9600bps
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 side DB9M ( DB9F to 3 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