Schneider Electric 9001K85 Alternate Action Switch Module

Schneider Electric’s 9001K85 Alternate Action Module is a 30 mm Harmony accessory that converts a standard momentary push-button operator into a maintained push-on/push-off control. Designed for use with standard 9001 Type K, KX, SK or T momentary push-buttons, the module mounts behind the operator and accepts up to two contact blocks. After installation, a first push latches the contacts in the depressed state and a second push releases them back to the normal position, delivering true alternate action without replacing the entire button assembly. For wiring, NC configurations can use the NC contact of KA1 or KA4 or KA3, while NO configurations can use KA4 or KA6. This makes 9001K85 a compact, modular solution for applications that require a latched contact in Harmony 9001K/9001SK push-button circuits, extending the functionality of standard momentary operators without changing the overall footprint.