Photoelectric Sensors (Touch Button): Sensor Type - Optical Touch Button; Operating Action - Momentary Action; Voltage Type - V AC/DC; Voltage Range - 20-30V AC/DC; Connection Type - 5-pin Euro Pigtail QD; Connection Size - M12x1; Material - Polysulfone Upper Housing; Color - Black Upper Housing, Black Field Cover; Output Configuration - Relay; Output Type - Electromechanical Relay; Style-Shape - Block w/Touch Groove & Cover; Response Time - On/Off: 20ms; Output Rating - 1A max.; Enclosure Rating - IEC IP66, NEMA 4X; Temperature Rating - 0 to 50 deg C (32 to 122 deg F); Mounting Type - Threaded Base, 30mm Dia.; Dimensions - Housing w/Cover Less Mounting Base HxWxL: 2.9x2.0x2.7" (74x51x69mm); Indicator LEDs - Two: Green - Power ON, Green - Output Activated (flashes when internal fault or blocked button detected on power up); Manufacturer Series - Self-Checking STB Series