AB 440R-ZBR520AZ1 RFID Safety Interlock Switch

Rockwell Automation Allen-Bradley 440R-ZBR520AZ1 Safety Interlock Switch Overview

The Allen-Bradley 440R-ZBR520AZ1 is a non-contact RFID safety interlock switch belonging to the Guardmaster® series. It is designed to monitor the position of safety gates, covers, and other movable machine guarding. When the guard is opened, the switch sends a signal to the safety circuit, typically stopping hazardous machine motion to protect personnel.

Product Detailed Description

• Function:

• Uses RFID (Radio Frequency Identification) technology for non-contact safety interlocking.

• Provides a high level of safety to prevent personnel from entering hazardous areas.

• Allows machine operation when the safety guard is in the closed position.

• Immediately stops or prevents machine start-up when the safety guard is opened.

• Features coded actuators to prevent simple bypassing.

• Offers multiple safety contacts (typically Normally Closed - NC) and one auxiliary contact (Normally Open - NO or Normally Closed - NC).

• LED indicators provide visual status of the switch.

• Features:

• Non-contact operation reduces mechanical wear and tear, extending service life.

• High level of coding prevents simple RFID tag spoofing.

• High fault tolerance, compliant with safety standards.

• Easy to install and maintain.

• Compact design.

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

Product Parameters

As the model number is very specific, the following are some key parameters. Always refer to the official Allen-Bradley product manual for the most accurate and complete parameters:

• Safety Contacts:

• Typically 2 or more safety Normally Closed (NC) contacts. These contacts are designed for direct connection to the safety circuit.

• Auxiliary Contacts:

• Typically 1 Normally Open (NO) or Normally Closed (NC) contact for providing additional signals or indication.

• Coding Level:

• May feature a high coding level, requiring a unique actuator (RFID tag) to activate the switch.

• Protection Rating:

• Typically IP67 or higher, suitable for industrial environments.

• Supply Voltage:

• Typically 24 V DC.

• Output Current:

• The rated current of the safety contacts is typically a few amperes.

• Response Time:

• The response time of the switch detecting guard opening and changing contact status is very fast.

• Operating Temperature:

• Typically in the range of -25 °C to +70 °C.

• Connection Method:

• Typically via cable connection.

• Housing Material:

• Typically robust plastic or metal.

• Certifications:

• Complies with safety standards such as ISO 13849-1 (up to PL e), IEC 61508 (up to SIL 3).

Product Advantages

• High Safety:

• Non-contact RFID technology and high coding level provide excellent safety protection against bypassing.

• High Reliability:

• Non-contact operation reduces mechanical wear, increasing reliability and service life.

• Easy Installation and Maintenance:

• Simple installation without the need for precise alignment of the actuator and switch.

• Non-contact operation reduces maintenance requirements.

• Resistance to Harsh Environments:

• High protection rating suitable for various industrial environments.

• Flexible Application:

• Can be used with various types of safety guarding.

• Status Indication:

• LED indicators provide clear visual information on the switch status.

Precautions

• Correct Installation:

• Follow Allen-Bradley's installation guidelines, ensuring the switch and actuator are correctly mounted on the guard.

• Safety Circuit Design:

• Integrate the safety interlock switch into a safety circuit that complies with relevant safety standards.

• Actuator Pairing:

• Ensure each switch is paired with its unique coded actuator to prevent unauthorized operation.

• Regular Inspection:

• Periodically inspect the physical condition of the switch and actuator, ensuring there is no damage or displacement.

• Functional Testing:

• Regularly perform functional tests to verify that the switch correctly interrupts the safety circuit when the guard is opened.

• Prevent Obstruction:

• Ensure the switch and actuator are not obstructed or interfered with by foreign objects.

Product Applications

The Allen-Bradley 440R-ZBR520AZ1 or similar non-contact RFID safety interlock switches are widely used in industrial automation applications requiring a high level of safety protection, including but not limited to:

• Robot Guarding:

• Monitoring safety gates for robotic work cells.

• Packaging Machinery:

• Monitoring guards for high-speed moving parts.

• Machine Tools:

• Monitoring safety doors and guards for tooling areas.

• Food and Beverage Industry:

• Areas requiring frequent cleaning, where non-contact design is more hygienic.

• Pharmaceutical Industry:

• Areas requiring high levels of safety and reliability.

• General Industrial Automation:

• Any application requiring prevention of personnel access to hazardous areas.

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