B&B Electronics CL32 RS-232 to Current Loop Converter

The B&B Electronics CL32 is a passive RS-232 to 20mA current loop converter designed for reliable serial data communication in industrial and legacy system environments. This compact interface adapter bridges the gap between modern RS-232 equipment and older 20mA current loop devices, allowing seamless integration without the need for active power supplies.

Key Features:

• Converts RS-232 signals to 20mA current loop (and reverse)
• Passive design — powered directly from the RS-232 signal lines, no external power required
• Supports both active and passive current loop configurations
• Compact, rugged construction suited for industrial environments
• Simple inline installation with standard DB connectors
• Compatible with a wide range of RS-232 host devices and legacy current loop peripherals

The CL32 is an ideal solution for connecting RS-232 computers, PLCs, or controllers to teletype (TTY) equipment, printers, and other 20mA current loop devices. Its passive, self-powered design minimizes installation complexity and makes it a reliable choice for both new installations and retrofitting legacy serial communication systems.