Series:	PM-54
Packaging:	Bulk
Part Status:	Obsolete
Sensing Distance:	0.197" (5mm)
Sensing Method:	Transmissive
Output Configuration:	PNP - Dark-ON/Light-ON - Selectable
Current - DC Forward (If) (Max):	50mA
Current - Collector (Ic) (Max):	15mA
Voltage - Collector Emitter Breakdown (Max):	30V
Response Time:	20µs
Operating Temperature:	-25°C ~ 55°C
Mounting Type:	Chassis Mount
Package / Case:	Module, Wire Leads, Slot Type
Type:	Unamplified

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PM-R54P Application Field and Working Principle

Introduction

PM-R54P is a type of optical sensor originating from Panasonic Electric Works. As a Transistor Output slot type photointerrupter, this product is used primarily for sensing whether or not a certain material is present in a given space. While its working principle may seem simple at first glance, multiple components must interact in just the right way in order for the PM-R54P to provide its intended purpose. A better knowledge of its working principle as well as its application field is required in order to use the device to its fullest potential.

Menchanics

The PM-R54P is a very compact optical sensor that consists of an emitter, a receiver and frame, and a buffer amplifier. The emitter and the receiver are shaped somewhat like a rectangle, and are positioned opposite each other. The emitter is slightly larger than the receiver, and the two are connected via a plastic frame. This frame also houses a small buffer amplifier that is responsible for maintaining the signal, as well as providing protection for the emitter and receiver.The purpose of such a small setup is to detect the presence of an object between the emitter and receiver. When an object is placed between them, the emitter is blocked, and its signal can no longer reach the receiver. This triggers a change in the signal provided by the PM-R54P, alerting the user to the presence of an object.

Principle Of Operation

The working principle employed by the PM-R54P is much simpler than it may appear at first glance. The light emitted from the emitter passes through an opening in the receiver, which is then received by a photodiode built into the device. When an object interrupts the light passing between the emitter and receiver, the signal provided by the photodiode changes, alerting the user to the presence of the object in the space.Essentially, the working principle behind the PM-R54P is that of a Schmitt Trigger. This means that when a certain amount of light is blocked by an object, the signal provided by the device will change from a logic 1 to a logic 0 state, or vice versa.

Application Field

The PM-R54P is primarily used as an optical sensing device in industrial and commercial applications. It’s compact size and simple working principle make it ideal for sensing the presence of a material in a confined space, such as a conveyor belt, production line, or even a laboratory. It can be used to detect defects in materials, such as contamination, cracks, or inclusions, which could otherwise go unnoticed before the product reached its destination. Additionally, it could be employed for the precise positioning of products, or to detect the passing of a certain material, such as in an assembly line.

Conclusion

The PM-R54P is a versatile and efficient optical sensor with multiple potential applications. As a Transistor Output slot type photointerrupter, it relies upon a simple Schmitt Trigger to detect the presence of an object or material in a given space. Its small size and ease of use make it the ideal device for industrial and commercial sensing operations, and should be considered for any sensing applications that require accurate and reliable performance.

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