Next Generation Microswitches: Integrating Resistors for Smart Fault Detection

Conventional microswitches are limited to two states—ON and OFF—making it difficult to identify wiring faults during normal operation. External resistors can add a third state but fail to detect issues between the switch and resistor, increasing component count and assembly time. OMRON addresses these limitations by embedding chip resistors directly into its switches, allowing them to distinguish between "normal" and "abnormal" operations using four voltage outputs. This innovation detects open and short circuits, reducing equipment downtime, and simplifies installation by detecting wiring faults within the sealed switch body.

This webinar introduces the integrated resistor technology, transforming simple switches into diagnostic devices. It covers the D2AW-R and D2EW-R families, highlighting mechanical compatibility, resistor configurations, and environmental ratings. The D2HW-R and D2AW-R series match existing outlines, enabling systems to output four distinct voltages for ON, OFF, short circuit, and disconnection states. The D2EW-R series features an ultra subminiature design, supporting multi-angle operation without a lever, with built-in resistors for fault detection in smart meters, safety boxes, and industrial robots.

Attendees will learn to implement four-state detection using a single analog input, set voltage thresholds for reliable detection, and explore economic benefits like reduced components, assembly time, and downtime. By the end, participants will understand how integrated resistors can transform microswitches into smart sensors.

Key Highlights:

• Overview of D2AW-R and D2EW-R families.


• Economic benefits: reduced components, assembly time, and downtime.


• Guidance on implementing four-state detection.