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The RS-232 Current Loop Interface Converter is a bi-directional self-contained unit that lets you interconnect a digital 20/30/60 mA unipolar current-loop interface to an RS-232 interface. The Interface Converter cannot be used with an analog current loop (4 to 20 mA) or bipolar current loop. Current loop was designed to transfer data in a noisy environment with as much integrity as possible. The maximum distance that the CL050 can be placed from other devices on the current loop is based on using 24 AWG under ideal conditions, with the CL050 designated as the active device in a point-to-point configuration.