STS-8831 Dual Channel Optical Switch Assembly Over / Under Optical Axis Features • Non contact switching • Four wires for electrical connection • Fast switching speed 34.8 16.0 ø 6.6 Description The STS-8831 consists of a pair of infrared emitting diodes and a pair of NPN phototransistors mounted on opposite sides of a 5.1 mm. wide slot. Phototransistor switching takes place whenever an opaque object passes through the slot. The Phototransistors have a 0.5x1.5 mm internal aperture for increased resolution. The polysulfone housing (Note 1) reduces interference from ambient light and provides dirt and dust protection. 340 mm length wires may be terminated with an IDC connector upon special order. Absolute Maximum Ratings Operating & Storage Temp. 13.2 ø 3.0 3.8 (2 PL) CL Optical Centerline 8.0 16.5 5.1 CL 3.0 CL Ch. 1 CL Ch. 2 6.35 11.4 Dimensions in mm (-/+ 0.12) -40°C to +100°C Input Diode Pair Reverse Voltage Average Forward Current Peak Forward Current (1µs pulse) Power Dissipation (Note 2) 6V 50 mA 3A 200 mW Phototransistor (each) Collector-Emitter Voltage Emitter-Collector Voltage Power Dissipation (Note 3) 30 V 5V 100 mW Green Sensor output (Ch. 1) Gray White Sensor output (Ch. 2) Blk (Gnd) Schematic Electrical Characteristics (TA=25°C unless otherwise noted) Symbol Parameter Min Typ Max Units Test Conditions Input Diode VF Forward Voltage 2.4 3.4 V IF = 40 mA IR Reverse Current 100 µA VR = 4 V Output Phototransistor ICEO Collector Dark Current 100 nA VCE = 10V, Ee = 0, IF = 0 BVCEO Collector-Emitter Breakdown Voltage 30 V IC = 100 µA, Ee = 0 BVECO Emitter-Collector Breakdown Voltage 5 V IC = 100 µA, Ee = 0 Coupled VCE(SAT) Collector Emitter Saturation Voltage 0.4 V IC = 250 µA, IF = 25 mA IC(ON) On-State Collector Current 400 µA VCE = 10V, IF = 25 mA ICX Cross talk 200 µA IF = 25 mA, VCE = 2.0 V Specifications subject to change without notice 103327 REV 1 Notes: (1) Plastic housing is soluble in chlorinated hydrocarbons and ketones. Recommended cleaning agents are methanol or isopropanol. (2) Derate linearly 2.6 mW/°C above 25°C. (3) Derate linearly 1.3 mW/°C above 25°C. 2 Cogan Ave, Plattsburgh NY, 12901, USA Tel: 518-561-3160 Fax: 514-747-3906 Northwich, Cheshire CW9 7TN, United Kingdom Tel: 01606-41999 Fax: 01606-49706 2150 Ward, Montreal Que, H4M 1T7, Canada Tel: 514-744-5507 Fax: 514-747-3906