Aiphone Corporation RY-18L Form-C Door Release Relay for JF, JK, LEM, or LEF Series, ABS Plastic Construction
External Signaling Relay for Select Aiphone Audio and Video Intercoms AX Series, DB Series, IE-8 Series, JF Series, JK Series, JM Series, JO Series, KB Series or NEM Series
Allows an external device to be triggered when intercom is called
External device will be activated when the door station calls in