B&B Electronics CL43 Current Loop to RS-232 Serial Converter

The B&B Electronics CL43 is a passive current loop to RS-232 signal converter designed for serial communications applications. It enables interfacing between legacy 20mA current loop devices and modern RS-232 serial ports without requiring external power, making it ideal for connecting older industrial equipment, terminals, and printers to contemporary systems.

Key Features:

• Converts 20mA active/passive current loop signals to RS-232 levels
• Passive design — draws power directly from the RS-232 host port (no external power supply required)
• Compact, inline form factor for easy installation
• Compatible with a wide range of RS-232 serial devices and COM ports
• Supports standard asynchronous serial communication protocols
• Rugged construction suitable for industrial environments

The CL43 is a straightforward plug-and-play solution for bridging 20mA current loop legacy hardware with RS-232 interfaces, simplifying serial communication upgrades in industrial, automation, and data acquisition applications.