B&B Electronics CL220 20mA Current Loop to RS-232 Converter

The B&B Electronics CL220 is a compact 20mA current loop to RS-232 serial interface converter designed for industrial and legacy serial communications applications. It enables seamless connectivity between 20mA current loop devices — commonly found in older terminals, printers, and industrial equipment — and modern RS-232 serial ports.

Key Features:

• Converts 20mA current loop signals to RS-232 logic levels
• Supports passive and active current loop configurations
• Compact, DIN-rail or panel-mountable form factor
• Optically isolated design for improved noise immunity and ground loop protection
• Wide compatibility with legacy serial devices, PLCs, and industrial terminals
• No external power required when used with an active current loop source

The CL220 is an ideal solution for engineers and system integrators who need to interface older 20mA current loop serial equipment with contemporary RS-232 host systems. Built to B&B Electronics' industrial standards, it delivers reliable, long-term performance in demanding environments.