BLASI – Push button 1xNO & 1xNC
BLASI – Push button 1×NO & 1×NC is a momentary or latching push‑button switch used in BLASI‑type automatic‑door and barrier control panels, with one normally open (NO) and one normally closed (NC) contact pair. The button is typically 22 mm or 25 mm in diameter and mounted flush or semi‑flush in the operator tube, wall or panel, serving as an activation or emergency‑control device (for example HOLD, manual‑open, or override). When pressed, the 1×NO contact closes to start a signal (e.g., call to the BLASI control board), while the 1×NC contact can simultaneously break another circuit (for example a safety interlock or alternative mode). BLASI lists this as a generic “Push button 1×NO & 1×NC,” so technicians usually source a standard industrial 1NO‑1NC push button that fits the BLASI‑area panel layout, wiring and mounting‑hole pattern.
Product Details
BLASI – Push button 1×NO & 1×NC forms part of the human‑interface layer on BLASI‑type pedestrian‑door and barrier systems, allowing users or staff to send manual control signals to the BLASI control unit. The button commonly uses a metal or plastic 22–25 mm head, with a simple screw‑clamp or spade‑type connection under the panel for the two contact pairs. The 1×NO contact provides a make signal when the button is pressed (for example a door‑open or hold‑open command), while the 1×NC contact can be used to cut a safety circuit or alternate mode so the BLASI unit responds only when the push button is active. Some versions are spring‑return (momentary) for temporary activation, while others may be latching if BLASI‑area practice requires a maintained state.
These push buttons are typically rated for auxiliary control‑circuit use (several amps at 230–250 V AC or 24 V DC), with mechanical lives in the hundreds of thousands of operations, which is suitable for high‑traffic entrances. They are intended for indoor or lightly sheltered locations, where the button head may be exposed to dust and cleaning but not to direct water. By using BLASI – Push button 1×NO & 1×NC, technicians and facility managers create a reliable, standardized way to manually trigger or interlock BLASI‑based door functions, helping to simplify control‑logic wiring and support safe, user‑controlled operation.
Article No: 7900119
Additional information
| Brand | BLASI |
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