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Current loop devices use current on or current off to transmit binary digits. B&B 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. Call B&B Electronics’ Technical Support Department for details.
High speed optical isolators couple and isolate transmit and receive data. All B&B current loop converters have a transmit (T+ and T-) and a receive (R+ and R-) loop. Each loop may be operated as an active or passive loop. When the converter needs to provide the loop current, a 12 VDC power supply is required for the current loop side. Maximum baud rate recommended for current loop converters is 19.2 kbps.
Current Loop to Serial RS-232/RS-422/RS-485 Converters
Model: Please see below