The 81-PB210-001 from Geovision is a PB21 push button W:35mm green word. The PB21 is an American standard push button switch, designed with a stainless steel faceplate. It can be integrated with access control system, allowing door exit by momentarily activating or deactivating the electric locking device. Dry contact, 5A / AC 125V or 3A / AC 250V.
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