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Fully Isolated RS-232 to RS-422/RS-485 Converter

Fully Isolated RS-232 to RS-422/RS-485 Converter
The MODEL485P is a high performance RS-232 to RS-485/422 interface converter. The product features optical-electrical isolation rated to more than 2.5KV and internal power isolation. It has surge protection on its data lines. The powerful line drivers allow for long distances of RS-422/485 serial transmission. The converter offers high data transfer rates and reliable performance. It automatically adjusts to the data rate and features automatic flow control for RS-485.

The converter has broad application in industry control systems. Power can provided from the RS-232 handshake lines or the included 9 VDC plug pack.

The converter has a male DB-9 port on the RS-232 side. The RS-485/RS-422 side has a female DB-9 connector and an RJ45 jack. The RS-485 and RS-422 signals are brought out to pins on both connectors. The box includes a DB-9 to screw terminal adapter which breaks out the RS-485 and RS-422 signals.


  • Isolated power supply, 2500 V signal isolation, 1500 W surge protection
  • Transmission distance can reach up to 1800 m at the rate of 115.2 kbps on RS-422/RS-485
  • Interface auto-adaptive technology: no DIP switches or jumpers to set
  • Automatic data flow control for conversion of the full duplex RS-232 to the half duplex RS-485
  • Automatic signal rate sensing, zero delay automatic transmit
  • Includes 1 meter DB-9 Male To DB-9 female cable
  • Includes 9 VDC Plug Pack
  • Includes female DB-9 to screw terminal adapter



Power:Port powered or external 9 VDC
Current Consumption:70 mA static, 200 mA dynamic
Standards:EIA RS-232, RS-485, RS-422
RS-232 signals:TX, RX, GND
RS-485 signals:D+, D-, GND
RS-422 signals:R+, R-, T+, T-, GND
Baudrate:300 to 115200 bps
Loading:Up to 128 nodes
Transmission Distance (RS-422/RS-485):up to 1800 m at 115.2 kbps
Port Protection:1500 W surge, 15 kV static discharge
Isolation:2.5 kV
Connector (RS-232)Female DB-9
Connector (RS-422/RS-485):Male DB-9 and RJ45
Working Temperature:-20 to 60 ºC
Storage Temperature:-25 to 80 ºC
Working Humidity:<95 %
Dimensions:120 × 33 × 16.5 mm

Please note: the included plug pack is only suitable for use in Australia and New Zealand.


SKU:  TOD-001

In Stock, 10 available

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Qty. Price
(AUD ex. GST)
1 to 4 $86.25
5 to 9 $77.63 (10% off)
10+ $73.31 (15% off)