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Patton 2018 RS-232 to 20mA Current Loop Converter[2018F-M]

Patton 2018 RS-232 to 20mA Current Loop Converter[2018F-M]

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The Patton Model 2018 is an optically isolated, multi-function RS-232 to 20mA current loop converter: Hook it up to an active 20mA current loop circuit and it's a passive converter. Hook it up to a passive 20mA current loop circuit, add DC power to one of several DB-25 interface pins, and it's an active converter. Connect two units together, supply DC power to one interface, and it's an optically isolated RS-232 distance extender.

The Model 2018 supports data rates to 19.2 Kbps, and current loop distances to 4 miles (6.4Km) over two twisted pair. The Model 2018 connects directly to either the RS-232 interface or the 20mA current loop interface using a male or female DB-25 connector. An external DCE/DTE switch eliminates the need for RS-232 crossover cables.


  • Operates Actively or Passively
  • Data Rates from 50 bps to 19.2 kbps
  • Range to 4 Miles (6.4Km) over Two 24 AWG (.5mm) Twisted Pair
  • No AC Power Required; Draws Necessary Power for (Passive) Operation from RS-232 Interface
  • Optically Isolated on Line Side
  • DB-25 Connectors on Both Ends
  • External DCE/DTE Switch
  • Two Units Work Together as Optically Isolated RS-232 Distance Extenders
  • 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.


  • Interfaces: Asynchronous
  • Transmit Line: 19 - 26 AWG (.9mm - .4mm)
  • Range: 4 miles (6.4Km) on 24 AWG twisted pair
  • Interfaces: EIA RS-232, CCITT V.24 (.5 mm) full duplex, 20mA current loop
  • Data Rate: 50 - 19.2 Kbps
  • Isolation: 2500V RMS via opto-isolators on line side
  • Connectors: Male or female DB-25 on both sides
  • Temperature Range: 0-50°C (32-122°F)
  • Altitude: 0-15,000 feet (4.5Km)
  • Humidity: Up to 95% non-condensing
  • Power Supply: None required; uses power from NIC data signals
  • Dimensions: 2.21" L x 0.8" H x 2.10" W (5.6 x 2.0 x 5.3 cm)
  • Weight: 1.7 oz.


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