Oct 6 2010
TT electronics OPTEK Technology has offered its new low-profile slotted optical switch, the OPB200, with a wider slot to support numerous applications. The switch is suitable for machine automation circuits, particularly for machine safety or assembly line automation applications.
The OPB200 switch comprises a phototransistor and an 890 nm infrared LED coupled within an opaque plastic casing. The optically triggered switch offers a maximum forward voltage of 1.7 V, at an IF of 20 mA, and a maximum reverse current of 100 µA, at a VR of 2 V.
The optical switch operates under temperature range of -40°C to +85°C. It has a maximum collector-emitter saturation voltage of 0.4 V, with the on-state collector current varying from a minimum of 1 mA to a maximum of 6 mA. The switch exhibits a maximum collector dark current of 100 nA, a minimum of 5 V emitter-collector breakdown voltage at an IE of 100 µA, and a minimum collector-emitter breakdown voltage of 30 V at 1 mA IC.
The output phototransistor transmits current for maintaining the circuit when no object is available in the slot. If an object comes into the slot and blocks the infrared light beam from the LED, then the output turns into OFF position to disrupt the circuit.