The EDC-8/9 is a safety-rated elevator door contact switch from SUNS, designed to monitor the closure position of lift doors and serve as a locking mechanism switch for automatic elevator door systems. Its positive-break NC contact ensures reliable safety operation compliant with international elevator standards.

How does the positive-break safety contact work?

The EDC-8/9 employs a forced-opening (positive-break) mechanism — when the switch actuator moves, the normally-closed contacts are physically forced apart rather than relying on spring action alone. This guarantees circuit interruption even if contacts weld, meeting the safety requirements of EN81-1 and EN81-2 for elevator door monitoring. The self-cleaning double-break silver-plated copper rivet contacts extend service life to 10 million mechanical operations.

What standards does the EDC-8/9 comply with?

The switch complies with EN81 (elevator safety code), CAN/CSA-B44.1/ASME-A15.5 (North American elevator safety standard), and VDE 0660 (low-voltage switchgear). The fiber-reinforced PA6/66 enclosure and transparent polycarbonate cover are UL94-V0 rated for flame retardancy, with an IP20 protection rating suitable for installation inside elevator control cabinets.