1SVR405661R0000 ABB - CR-U 21

The 1SVR405661R0000, also known as the CR-U 21, is a pluggable interface relay module manufactured by ABB. This versatile module is designed to provide reliable electrical isolation and signal amplification in a wide range of industrial applications. It features integrated polarity protection, ensuring safe and consistent operation within DC circuits ranging from 6 to 220VDC. The CR-U 21 simplifies installation and maintenance with its pluggable design, allowing for quick replacement without disrupting the entire system. Its clearly marked terminals, A1+ and A2-, facilitate easy wiring and prevent connection errors. This module is ideal for use in control panels, automation systems, and other applications where signal conversion and isolation are required. The CR-U 21 enhances system reliability by protecting sensitive control circuits from voltage spikes and electrical noise. Its compact design saves valuable space in control cabinets, making it a practical solution for space-constrained environments. With its robust construction and wide voltage range, the CR-U 21 offers a dependable and efficient interface solution.