| GENERAL CHARACTERISTICS ITEM DESCRIPTION | TWO-CHANNEL SINGLE PRIORITY DEVICE DESIGNED TO BE USED WITH OPTICOM EMITTERS AND DETECTORS AND TO INTERFACE WITH ELECTROMECHANICAL OR ELECTRONIC TRAFFIC CONTROLLERS; POWERED FROM AC MAINS AND CONTAINS ITS OWN INTERNAL POWERSUPPLY FOR OPTICAL DISCRIMINATION,DISPLAY SENSING,INTERVAL TIMING AND INTERNAL RELAY OUTPUT CIRCUITRY; UPON RECOGNITION OF VALID PRIORITY CALL THE INTERFACE CIRCUITRY CAUSES THE CONTROLLER TO ADVANCE TO AND/OR HOLD THE DESIREDSIGNAL DISPLAY BY UTILIZING EXISTING CONTROLLER INPUTS; SOLID STATE CIRCUITRY |