Patton 2085F High Speed RS-232 to RS-485 Interface Converter

SKU: 945 Category:




The Model 2085 High Speed RS-232 to RS-485 Interface Converter provides exceptional versatility in a compact package. Requiring no AC power or batteries for operation, the Model 2085 supports asynchronous RS-232 data rates to 115.2 Kbps over one or two unconditioned twisted pair.

The Model 2085 passes one control signal in each direction and can handle up to 50 terminal drops in a multipoint polling environment. The Model 2085 may be configured for high or low impedance operation, carrier may be set to “constantly on” or “controlled by RTS”, and the unit can operate with or without “echo”. RTS/CTS delay may be set for “no delay” or 8 mS.

The Model 2085 is equipped with either male or female DB-25 for RS-232 connection. Options for twisted pair connection include terminal blocks with strain relief, RJ-11, RJ-45 and DB-25 male or female. Silicon Avalanche Diodes provide 600 watts per wire of protection against harmful data line transient surges.


  • Operates asynchronously, point to point or multipoint, over 2 or 4 wires
  • Up to 50 multipoint device drops in a polling environment
  • Data rates to 115.2 Kbps
  • Passes transmit & receive data, one control signal each direction
  • No AC power or batteries are required
  • Variable high/low impedance settings
  • Able to operate with or without “echo”
  • Carrier can be set as “constantly on” or “controlled by RTS”
  • Compact size ( 2.66” x 2.10” x 0.73”)
  • Twisted pair connection via strain relief, RJ-11 or RJ-45
  • Silicon Avalanche Diode surge protection


Transmission Format: Asynchronous

Data Rate: Up to 115,200 bps

Range: Up to 9 miles (14.5km)

RS-232 Interface: DB-25, male or female (DCE/DTE switchable)

RS-485 Interface Options: DB-25, male or female; RJ-11 or RJ-45 jack; terminal block with strain relief

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 msec or 8 msec

Carrier: The carrier is switch selected either continuous operation or controlled by RTS

Power: Draws operating power from RS-232 data and control signals; no AC power or batteries required.

Temperature: 32° to 122° F (0° to 50° C)

Size: 2.66" x 2.10" x 0.73" (6.8 x 5.3 x 1.9 cm)


Model Name



     2085F RS-232 TO RS-485 INTERF. CONV


Also available upon request:

2085F-25F RS-485 CONVTR, DB25F – DB25F
2085F-25M RS-232 TO RS-485 INTERF. CONV.
2085FRJ11 RS-232 TO RS-485 CONV W/RJ11
2085FRJ45 RS-232 TO RS-485 CONV W/RJ45

Additional information

Weight 5.00 lbs
Dimensions 6.00 × 6.00 × 3.00 in


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