The Bender IR420-D4-2 is a high-precision insulation monitor designed for AC 0-300V IT systems, ideal for industrial control circuits, machinery, power plants, and automation applications. Its LCD display simultaneously shows two independent insulation resistance values, with adjustable response thresholds (1-200kΩ) and two independent alarm relays. The response time delay (0-99 seconds) can be customized to meet diverse safety requirements.
Featuring fault memory and support for built-in or external self-check/reset buttons, the device simplifies maintenance. Its modular design (36mm width) ensures easy rail mounting and RoHS compliance. Real-time system status is provided via a multifunctional LCD and indicator lights, enabling rapid response to insulation anomalies. Compliant with IEC 60204-1, EN 60204-1, and other international standards, it delivers reliable insulation monitoring for industrial equipment, elevators, and mobile generators, ensuring system safety and stability.