Schneider Electric 9001KA1 Contact Block

The Schneider Electric 9001KA1 is a 30 mm Harmony contact block that attaches to pushbutton assemblies of types K, SK or KX to provide a single changeover contact (1 normally open and 1 normally closed). It has no external pins; the NC portion is wired to terminals 1 and 2, while the NO portion uses terminals 3 and 4, supporting quick wiring with screw-clamp terminals for durable panel connections. Designed for 0–600 V control circuits with silver-alloy contacts, this block is built to endure the make/break demands of industrial signaling while maintaining a compact 30 mm footprint that aligns with other 9001 blocks for side-by-side mounting. The KA1 is part of Schneider Electric’s Fingersafe-compatible 9001 contact-block range, enabling safe insertion and removal in built-in operator stations. Typical applications include start/stop signaling, interlock logic, and basic control circuits in automation panels, where a single pushbutton can simultaneously provide a signal for one NO path and one NC path. When used with Harmony 9001K, 9001SK, or 9001KX operators, it supports reliable, space-efficient control architectures in machinery, conveyors, and process equipment, delivering a straightforward, compact solution for basic control logic without inserting additional components. The unit’s positive-opening characteristic contributes to predictable disengagement behavior, enhancing safety in applications that require a clear separation of contacts during actuation and de-energization.