Aiphone RY-3DL Selective Door Release Adaptor for JP, JF and KB

Selective Door Release: choose which door opens from the answering station, Both Output Types: normally open and normally closed output options, Series Compatibility: compatible with the JP, JF and KB Series, and with the IE-2AD, Relay Input: 12 to 18V DC on the red and gray wires, 22AWG, Contact Ratings: normally open output rated 1A at 30V DC or 50V AC, and normally closed output rated 1A at 30V DC or 50V AC, Wiring: 4 conductors from the answering station to the RY-3DL, 2 conductors from the power supply, and 2 conductors to the release mechanism, with power wired in series, Dimensions: 5-1/2 in H x 3 in W x 1-1/2 in D.