Allen-Bradley 440R-W23221 Expansion Module

1. Product Overview

The 440R-W23221 is a multi-function safety relay that simplifies inventory by supporting multiple types of safety inputs. It features a simple rotary switch on the front panel, allowing users to select the desired function without complex software programming.

2. Technical Specifications (Product Parameters)

3. Key Product Advantages

• Universal Input Compatibility: A single unit can handle E-stops, light curtains, safety gates (interlocks), and safety mats.

• Simplification: The rotary switch configuration eliminates the need for software, reducing setup time and potential programming errors.

• Space Efficient: The 22.5mm width allows for more components in smaller control panels.

• Fast Response Time: Provides rapid de-energization of outputs to ensure maximum operator safety.

• Global Compliance: Meets international safety standards, making it suitable for machines exported worldwide.

4. Important Considerations & Precautions

• Configuration Lock: Ensure the rotary switch is set to the correct logic before powering on. Changing the switch while the device is active will trigger a fault.

• Terminal Torque: Use the correct torque settings for screw terminals to prevent loose connections or arcing.

• Environmental Factors: Avoid installing the unit in environments with excessive vibration or temperatures exceeding $55^{\circ}C$.

• Redundancy: To maintain a Category 4 or PLe rating, ensure that the input devices and wiring also meet the required safety architecture.

5. Typical Product Applications

The 440R-W23221 is used in industrial automation where personnel protection is required around hazardous machinery:

• Emergency Stop Circuits: Monitoring E-stop buttons across a production line.

• Optoelectronic Guarding: Interfacing with Safety Light Curtains (e.g., GuardShield).

• Gate Interlocking: Monitoring safety switches on machine doors or fences.

• Pressure Sensitive Mats: Safety logic for floor-based presence sensing.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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