SF4B-A28-01(V2)

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Introduction

Machine safety is a must for any workplace, be it large steel plants or small workshops. One of the key components in the measures taken to ensure safe operation of machinery is the installation of light curtains. Light curtains are an active safety device that use light beams to detect if an operator or piece of equipment gets too close to a hazardous area. If the light curtain is breached, the machine is automatically stopped and an alarm is activated.

The SF4B-A28-01(V2) is a safety light curtain which, along with its features, simplifies installation, improves safety, and increases efficiency of any machine. This article will discuss the application field and working principle of this safety light curtain.

Application Field

The SF4B-A28-01(V2) is a type 2 safety light curtains suitable for a variety of applications, such as dangerous machine areas, industrial workplaces, production lines, parking lot safety fences, automatic doors, etc.The curved/triangular shape of the device, with 2 breakable infrarred beams, allows for optimal coverage in spaces with extremely limited heights and lower dimensional areas.

The product has a muting function that reduces downtime by allowing the operator to penetrate the beam safely for a short period of time, and automatically reactivates when the operator retreats from the hazardous zone. By having this feature, it significantly reduces error in operation and increases safety, as an operator can perform their job without having to turn the machine off and on again as often as before.

It has a single finger guard width, further reducing installation time and eliminating the potential for error. Additionally, its high speed response times (500ms OFF), wide diagnostic coverage, low power consumption (max 10W), and Ethernet/PROFINET connectivity make it a preferred choice.

Working Principle

The SF4B-A28-01(V2) light curtain is an active safety device consisting of an emitter and receiver, connected by an Ethernet/PROFINET cable.

The emitter is a device that forms and is responsible for the emission of infrared lightbeams. The emitted light at a radiation angle of 9° and intensity of 30 mW/sr is within the safe limits set by the regulations, giving it the conformity to class 2 laser products. The emitter is linked to the receiver by a special coded signal which requires no extra wiring.

The receiver is a device which is designed to detect the changes of the infrared light when a person or an object is present in a hazardous area. Once the change in the signal is detected, the corresponding PLe-rated safety system is actuated and the machine stops operation.

The SF4B-A28-01(V2) has a muting function. This ‘muting’ feature enables the operator to safely penetrate the beam for a short period of time, and it will automatically reactivate when the operator ceases to interfere with the emitted light. This ensures that not only is the danger prevention maximized, but it also significantly reduces downtime by reducing the amount of times the machine has to be shut down and restarted.

Another feature of the SF4B-A28-01(V2) is its huge selection of diagnostic options. It can monitor and alert the user for any potential faults occurring, while allowing the user to permit low-level maintenance tasks without having to shut down the machine completely.

Conclusion

The SF4B-A28-01(V2) light curtain is a reliable and powerful safety device. Its features, such as muting and a wide range of diagnostic options, simplify installation, improve safety, and increase machine efficiency. Its curved/triangular shape allows for optimal coverage in tight spaces, while its single finger guard width further reduces installation time and errors. In conclusion, the SF4B-A28-01(V2) is a strong and safe device that will ensure the efficient and safe use of any machine.

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