RF-57/A Product InformationThe RF-57/A unit is used in hotel and rented room installation to control the light and A/C circuits of a room. It operates in cooperation with card reader RF-42 or RF-43 and one or more magnetic window contacts. When a window is opened and remains open for more than 60 seconds, the A/C output is deactivated. When the window is closed the A/C is activated instantly. When the occupant is leaving the room and removes the card from card reader, then the two outputs of RF-57/A are turned off after 60 seconds and the lighting and A/C are shut down. If the card is inserted, then lighting and A/C are activated instantly. In case of a room with air conditioner who does not use magnetic contact, then the wire from terminal B of card reader, must be connected directly to WIN terminal of RF-57/A. Great care must be given to the cable cross section when connecting the light and A/C circuits to the RF-57 unit (depend on the loads). To supply the RF-57/A, and connecting it to the card reader, the diameter of the wires should not exceed 1.5mm. For connecting the RF-57/A with the lighting circuit or the air condition, the diameter should not exceed 6 mm Horizontal TabsDocumentation User Manual