Port-Powered RS232 to RS485 Converter

The IT-SC485-TLC-9 is a bi-directional port-powered RS232 to RS485 converter. 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.




  • Port-powered from RS232 port (TXD, RTS, DTR): no external power is necessary
  • Convert RS-232(TXD,RXD signal) to RS-485 signal
  • Plug-and-Play (hot pluggable, Data format Auto sensing & Self-adjusting)
  • Data direction auto-turnaround, no flow control is required
  • Point to multi point, support 128 nodes loopback


Standards: EIA RS-232C, RS-485 standard
RS-232 signal: TX, RX, GND
RS-485 signal: D+, D-, GND
Working mode: Asynchronism, point to point, 2 wire half-duplex
Transfer 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
Max number of drops: 128 nodes
Transfer distance: RS-485 side: 1.2Km
RS-232 side: no less than 5m
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 RS-232 port TXD, RTS, DTR
Consumption: Static less than 10mA, dynamic less than 40mA
Operating temperature: -20°C to 60°C
Storage temperature: -40°C to 85°C
Humidity: 5% to 95% (no condensation)
Dimensions: 90.0mm×33.0mm×16.5mm (DB9)
Material: Plastic (shell)
Weight: 40g
Warranty: 3 years
Approvals: FCC, CE, RoHS approvals

Product Datasheet

Intellisystem Technologies