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Patton 2089F RS-232 (EIA-574) to RS-485 Interface Converter[2089F]

Patton 2089F RS-232 (EIA-574) to RS-485 Interface Converter[2089F]

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The Model 2089 is Patton's first high speed EIA-574 (RS-232 on a DB-9) to RS-485 interface converter. Supporting async data rates to 115.2 kbps over one or two unconditioned twisted pair, the Model 2089 passes one control signal in each direction. The Model 2089 can handle up to 50 terminal drops in a multipoint polling environment; yet it is small enough to plug directly into a DB-9 serial port...and requires no AC power or batteries for operation. The Model 2089 has five configuration parameters, allowing the unit to be "fine tuned" to a variety of point-to-point or multipoint applications. Silicon Avalanche Diode surge protection is standard as well.




  • Fully Conforms to the EIA RS-485 Standard
  • Data Rates to 115,200 bps
  • Range Up to 9 Miles (14.5 Km)
  • No AC Power or Batteries Required
  • Up to 50 Terminal Drops in a Multipoint Polling Environment
  • 600 Watts of Silicon Avalanche Diode Surge Protection - Standard
  • Made in the USA — This Patton equipment is designed by Patton engineers and built in our Gaithersburg, Maryland facility. Patton's American-made manufacturing process delivers high-quality networking solutions with reliability you can trust.


  • Transmission Format: Asynchronous
  • Data Rate: Up to 115,200 bps
  • Range: Up to 9 miles (14.5km)
  • EIA-574 Interface: DB-9, male or female
  • RS-485 Interface Options: RJ-11 or RJ-45 jack, terminal block with strain relief
  • Transmit Line: 2, 4 wire unconditioned twisted pair
  • Transmit Mode: 4-wire, full or half duplex; 2-wire half duplex
  • Control Signals: DSR turns "ON" immediately after the terminal raises DTR; DCD turns "ON" after recognizing the receive signal from the line; CTS turns "ON" after the terminal raises RTS.
  • RTS/CTS Delay: 0 or 8 msec
  • Carrier: The carrier is switch selected either continuous operation or controlled by RTS
  • Surge Protection: 600W power dissipation at 1 mS 
  • Power: Draws operating power from EIA-574 data and control signals; no AC power or batteries required.
  • Temperature: 32° to 122° F (0° to 50° C)
  • Size: 2.50" x 1.20" x 0.75" (6.4 x 3.0 x 1.9 cm)


Model Name


2089F RJ45 RS232/RS485 CONVERTER, DB9F/RJ45
2089F RJ11 RS232/RS485 CONVERTER, DB9F/RJ11
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