A-B 2711P-T7C4D8 Central control module

A-B Safety Light Curtain Receiver Overview

A-B (Allen-Bradley) safety light curtains are optoelectronic sensing devices used to protect personnel from injury caused by hazardous machine motion. A complete safety light curtain system typically consists of

 a transmitter and a receiver. The transmitter emits multiple infrared light beams, and the receiver monitors these beams. When any of the beams are blocked (for example, when a person's body part enters the 

hazardous area), the receiver immediately sends a stop signal to a safety relay or safety controller, which in turn stops the dangerous machine motion.

Product Detailed Description

• Function:

• Receives the infrared light beams emitted by the safety light curtain transmitter.

• Continuously monitors the beams for obstruction.

• Outputs a safety stop signal when a beam is blocked.

• Typically requires use with a safety relay or safety controller to achieve a complete safety function.

• Features:

• Rugged industrial design for harsh environments.

• Available in various protected heights and resolutions to suit different application needs.

• Integrated status indicators for easy diagnostics.

• Some models may have self-checking capabilities.

Product Parameters

Since there are various models of A-B safety light curtain receivers, here are some common parameters. Please refer to the product manual for specific models:

• Protected Height:

• The vertical area over which the light curtain can detect an obstruction.

• Resolution:

• The minimum object size that the light curtain can detect. For example, a 14mm resolution can detect objects with a diameter greater than 14mm.

• Response Time:

• The time delay between the light beam being blocked and the receiver outputting a stop signal.

• Operating Voltage:

• Typically 24V DC.

• Output Signal:

• Usually PNP or NPN safety output signals.

• Environmental Rating:

• For example, IP65 or IP67, indicating protection against dust and water.

• Operating Temperature:

• The temperature range within which the device can operate normally.

• Connection Type:

• For example, M12 connectors or terminal blocks.

Product Advantages

• Personnel Safety Protection:

• Effectively prevents personnel from entering hazardous machine areas, reducing the risk of workplace injuries.

• High Reliability:

• Rugged industrial design and advanced optoelectronic technology ensure reliable operation.

• Easy Integration:

• Can be used with various safety relays and safety controllers.

• Wide Range of Options:

• Available in various protected heights and resolutions to suit different application needs.

• Increased Production Efficiency:

• Allows operators to work more freely within safe zones, improving production efficiency (compared to physical safety barriers).

Precautions

• Correct Selection:

• Choose the appropriate resolution and protected height of the light curtain based on the specific hazard level, machine characteristics, and required protection area.

• Correct Installation:

• Install according to the manufacturer's installation guidelines, ensuring proper alignment of the transmitter and receiver, and secure mounting.

• Safety Circuit Design:

• The output of the light curtain must be connected to a suitable safety relay or safety controller to form a complete safety stop circuit.

• Regular Inspection and Maintenance:

• Regularly clean the optical surfaces of the light curtain, check for damage, and test its proper functioning.

• Avoid Obstructions:

• Ensure that there are no permanent obstructions within the protected area of the light curtain.

• Compliance with Safety Standards:

• Installation and use must comply with relevant safety standards and regulations (e.g., OSHA, IEC, etc.).

Product Applications

• Press Brakes and Punch Presses:

• Protecting operators during the operation of stamping and pressing equipment.

• Injection Molding Machines:

• Preventing personnel from entering hazardous areas during mold closing.

• Assembly Lines:

• Protecting personnel working on automated assembly lines.

• Packaging Machinery:

• Ensuring operator safety during the operation of packaging equipment.

• Robotic Workcells:

• Restricting personnel from entering hazardous robot operating areas.

• Other Hazardous Machinery:

• Any industrial equipment requiring prevention of personnel entry into dangerous motion areas.

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