GP1S44S1J00F

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Optical sensors find a variety of applications in robotics, factory automation, and consumer electronics, including photointerrupters. The GP1S44S1J00F is a slot-type photointerrupter, also referred to as a logic output type, with an open collector NPN output. The device is powered by a 3 VDC to 5.5 VDC supply and has a low power consumption of 10 mA. It is a single in-line package (SIP) with dimensions of 4.9 mm (height) x 2.54 mm (width) x 6.3 mm (length).

The GP1S44S1J00F consists of an infrared LED on one side, and an NPN silicon phototransistor detector on the other. When an object that interrupts the transmission of infrared light between the LED and the detector passes through the gap, the output signal goes low. The device features an on/off current ratio of 1000:1, which is the ratio of the current sinking capability to the input current that turns in the phototransistor detector when illuminated with infrared light from the LED, and a very long response time of 5 µs at ambient temperatures.

To ensure correct operation of the GP1S44S1J00F, the space between the LED and detector must be kept clear of any objects that may interfere with the path of the infrared beam, and the detector should be pointed away from any strong sources of infrared light. The typical applications of the GP1S44S1J00F are measuring the speed of rotation of objects, sensing the presence of objects in a particular area, and positioning. It can be found in robots, automation systems, factory automation equipment, motors, and electronic gaming machines.In operation, the IR LED and the phototransistor detector are connected in series to the power source. When there is an object that interrupts the transmission of infrared light between the LED and the detector, the current flow is interrupted, causing the output to go low. The output voltage is inversely proportional to the intensity of the infrared light, and the sensitivity can be adjusted by varying the current through the device. When the path of the infrared beam is blocked, the phototransistor detector is in the reverse bias condition, which prevents the current from flowing though the device. As the blockage is removed, the detector becomes forward biased, and the current returns to the normal state. At this point, the output signal is switched from low to high. The output voltage is directly proportional to the intensity of the infrared light, and is used as an input signal for the connected circuitry.

Safety features of the GP1S44S1J00F include optical isolation which prevents electric shock, and insulation between the LED and detector which provides physical protection. In addition, the device is protected from damage by electromagnetic interference, as it is compliant with CISPR 22 Class B. This guarantees interference-free operation in areas where electromagnetic noise is prevalent, such as welding areas and surroundings with high current flow.

The GP1S44S1J00F is a reliable and economical option for a variety of applications that require proximity sensing. It is a cost-effective alternative to other slot-type photointerrupters, and offers easy installation and setup in any environment. It is also UL recognized and CE certified, providing an added assurance of reliability and quality.

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