This document introduces the pluggable function modules of the pluggable interface relay CR-U, which include reverse polarity protection, LED indication, RC element, and overvoltage protection.
This document is a data sheet for pluggable function modules intended for use with standard sockets for interface relays in the CR-U series. The modules provide various functions including reverse polarity protection, LED indication, RC elements, and overvoltage protection.
The document lists specific module types such as CR-U 21 through CR-U 91CV, detailing their features like voltage ratings (DC or AC), component configurations (diodes, varistors, LEDs), and order codes. It also references separate data sheets for the relays and sockets.
They are designed for mounting on standard sockets for interface relays CR-U.
The CR-U 21 module is rated for 6-230 V DC.
A packing unit contains 10 pieces.