The RY-3DL provides selective door release capability with the KB-3MRD Video Sentry Color Tilt, JP-4MED Hands-Free Color Video, or IE-2AD(U) Chime Tone Intercom.Main FeaturesProvides selective door release capabilityCompatible with JP, JF, and KBBoth normally open and normally closed output optionsRelay Input: 12-18V DC, Red, Gray wires, 22AWGN/O Output rating: 1A at 30V DC or 50V ACN/C Output rating: 1A at 30V DC or 50V ACWiring: 4 conductors from Master Station to RY-3DL. 2 conductors from power supply to RY-3DL. 2 conductors from RY-3DL to release mechanism, with power wired in series.Dimensions: 5-1/2" H x 3" W x 1-1/2" DGeneral InformationName: Aiphone RY-3DL Selective Door Release Adaptor, Aiphone Co., Ltd, AiphoneCategory: Aiphone, Communications, Intercoms & Telephone Entry, Intercom & Telephone Entry AccessoriesUPC Code: 4968249450092Country of Origin: China. Country of origin is subject to change.