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Home Serial Current Loop Converters

Current Loop Converters

Current loop devices use current on or current off to transmit binary digits. B&B current loop converters interface RS-232 and RS-422/485 systems to the most common current loop ports, 20 mA ports with open circuit voltages up to 30 V. Many models can be modified for higher loop currents and voltages.
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  1. Converts RS-232 to 20mA current loop
  2. 2000V optical isolation protection
  3. Data rate: up to 19.2 kbps
  4. Wide operating temperature: -40 to +80 °C
  5. DIN rail mount, IP20 enclosure (panel mount option)
  6. One Transmit, one Receive current loop (set as Active or Passive)
  7. External power source required (not included, sold separately)


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Serial Converter, RS-232 DB9 F / 20 mA Current Loop TB
  1. RS-232 to digital 20 mA Current Loop with Isolation
  2. Each current loop may be operated active or passive
  3. Baud rates up to 19.2 kbps
  4. Transmit (T+ and T-) loop and Receive (R- and R-) loop
  5. Port-power or external power supply (not included, sold separately)


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