OPB491N11Z

Series:	Photologic®
Part Status:	Obsolete
Sensing Distance:	0.125" (3.18mm)
Sensing Method:	Transmissive
Output Configuration:	NPN - Open Collector, Buffer
Mounting Type:	Chassis Mount
Current - Supply:	7.5mA
Voltage - Supply:	4.5 V ~ 16 V
Response Time:	50ns
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	Module, Pre-Wired

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Introduction:
The OPB491N11Z is an optical slot type photointerrupter with a logic output. An optical sensor is a device that detects a change in light intensity and produces an electrical signal in response to that change. Other applications of optical sensors include motion sensing, impact or vibration detection, and flame detection.

Optical Sensors:
Optical sensors are a lot like the ones you use every day. Sensors can detect light, motion, and temperature differences to produce an electrical signal. They are often used in industrial control systems, robotics, lighting applications, and instrumentation. In optical sensing, a light beam is generated and then aimed at a target or an object. When the light beam is interrupted, the sensor detects a change in intensity that produces an electrical signal. This signal can then be used to turn on an activity, turn off an activity, monitor an environment, or measure an output.

Photointerrupters:
A photointerrupter is an optoelectronic device used to detect the interruption or passage of objects in a light beam. It consists of a light emitter and a photodetector, both of which are contained in a single package. When an object passes through the light beam, it interrupts the light, causing a decrease in the output signal. Photointerrupters are commonly used in industry to detect the presence or absence of objects, such as paper or parts, on a conveyor belt.

Slot Type:
The OPB491N11Z is a slot type photointerrupter, meaning that it uses a slotted wheel to detect the interruptions in the light beam. This is often used in industrial applications, where lots of objects or subsystems need to pass through the same light beam, such as on a conveyor belt. When an object or subsystem passes through the wheel, it momentarily interrupts the light beam, causing a change in the output signal of the photointerrupter.

Logic Output:
The OPB491N11Z also has a logic output, meaning that it comes with an integrated logic circuit that can interpret the signal detected by the photointerrupter. The logic circuit can be programmed to respond to different types of interruptions, such as long or short interruptions, spot, or any other pattern. This make it a very versatile device.

Application Field:
The OPB491N11Z is typically used in industrial applications. It can be used to detect the presence or absence of an object or subsystem on a conveyor belt, as well as in automation systems. It is also used to detect the motion of parts in machinery, as well as in robotics, lighting applications, and instrumentation.

Working Principle:
The working principle of the OPB491N11Z is quite simple. It consists of an emitter that produces a light beam, and a photodetector that detects the change in light intensity when the beam is interrupted. When an object passes through the wheel, it momentarily interrupts the light beam, causing a change in the output signal of the photointerrupter. This change is then interpreted by the integrated logic circuit, which can be programmed to respond to different types of interruptions. This makes the OPB491N11Z an incredibly versatile device.

Conclusion:
The OPB491N11Z is an optical slot type photointerrupter with a logic output. It is typically used in industrial applications to detect the presence or absence of an object or subsystem on a conveyor, as well as in automation systems. The photointerrupter consists of an emitter, photodetector, and an integrated logic circuit, which can be programmed to interpret different types of interruptions.

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