The Bender IR420-D6-2 ISOMETER is a highly reliable insulation monitoring device engineered for unearthed electrical systems (IT systems). Manufactured in Germany, this advanced relay continuously monitors insulation resistance during offline conditions, featuring a wide response value range from 100 kΩ to 10 MΩ. The device is equipped with an intuitive front panel that includes a clear LCD display, LED status indicators (ON, AL1, AL2), and tactile pushbuttons (Test, Reset, Menu) for straightforward configuration and diagnostics. Designed for industrial control environments, it utilizes a versatile AC/DC 70…300 V supply voltage and mounts easily on a standard DIN rail. With comprehensive international certifications including cULus, CE, RoHS, and Lloyd’s Register Type Approval, the IR420-D6-2 (Art.-no. B71016407) guarantees exceptional safety and performance.