B&B Electronics CL264 RS-232 to Current Loop Converter

The B&B Electronics CL264 is a passive RS-232 to 20mA current loop converter designed for interfacing modern RS-232 serial equipment with legacy current loop devices. Current loop interfaces were widely used in early terminals, teletypes, and industrial equipment, and this converter provides a reliable bridge between the two communication standards.

Key Features:

• Converts RS-232 signals to 20mA current loop (and vice versa)
• Passive design — draws power directly from the RS-232 control lines, no external power required
• Supports both active and passive current loop configurations
• Compact, inline form factor for easy installation
• Compatible with standard DB9 or DB25 RS-232 serial ports
• Ideal for connecting legacy industrial equipment, terminals, and printers

The CL264 is well-suited for industrial automation environments, legacy system integration, and any application requiring reliable serial communication between RS-232 and current loop devices. Its passive, self-powered design simplifies installation and eliminates the need for an additional power supply.