Ultra-subminiature switches add status and fault detection for diagnostics and security

OMRON Electronic Components Europe has expanded its portfolio of sealed basic switches with the introduction of the D2EW-R series, which features integrated resistors to detect events such as malfunctions and tampering.

Depending on the voltage across the D2EW-R internal resistors, the system can differentiate between a normal switch-open or switch-closed status and an open circuit or short circuit at the terminals. By assisting in detecting faults such as wiring defects, equipment failures, or malicious damage, these switches can extend diagnostic monitoring in industrial automation and enhance security protection for equipment, including vending machines and smart meters.

Utilising the underlying architecture of D2EW switches, the new D2EW-R series features the same compact dimensions of 8.3mm x 7mm x 5.3mm and supports multi-angle operation without needing a lever. These features save space and enhance flexibility in customer-unit design, while the sliding contact structure provides high reliability and quiet operation. Options include polarised mounting posts or M3-screw mount that ease installation in small spaces, and press-fit electrical terminals, solder terminals, and moulded lead wires with straight or angled exit.

Additionally, the switch mechanism features IP67 protection and is highly resistant to vibration and shock. With their built-in resistors, the series variants are rated for operation from 5V to 18V over a temperature range of -40C to 85C.

The D2EW-R series is a suitable solution for security applications needing anti-theft or anti-tamper functionality, such as smart meters, safety boxes, surveillance cameras, and automated locking systems. Further, it is suited for use in factory automation systems that need failure detection and diagnostics, including industrial robots, AMRs, and AGVs.

The new switches join the extensive family of sealed miniature switches from the company, which also includes D2AW, D2AW-R, D2GW, and D2QW sliding-contact types for levered and lever-free operation, as well as a 0.1A current rating. Other switches, such as the D2VW, D2SW, and D2HW, which are capable of handling higher current load, are also available.