440N-Z21SS2H
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Overview of Allen Bradley 440N-Z21SS2H
The Allen Bradley 440N-Z21SS2H is a plastic rectangular safety switch from the SensaGuard product family, designed for reliable guarding and door safety applications. Featuring a plastic rectangular housing and a flat pack standard coded actuator, this non-contact safety switch ensures precise and dependable detection with an assured sensing distance of 25 mm (0.98 in). It is equipped with dual PNP safety outputs and an auxiliary output for clear status signaling and diagnostics through LED indicators. The 440N-Z21SS2H operates on a 24 V DC power supply and includes a 6-inch pigtail with an 8-pin micro M12 connector for simple integration. This device meets a range of safety standards, making it suitable for demanding industrial environments where safety and durability are critical.Key Features of Allen Bradley 440N-Z21SS2H
- Plastic rectangular housing with flat pack standard coded actuator
- Assured sensing distance of 25 mm (0.98 in) for precise detection
- Two safety outputs (2 x PNP) with 0.2 A max current capacity
- One auxiliary output (1 x PNP) for additional signaling needs
- LED door status and diagnostic indication for easy troubleshooting
- Operates at 24 V DC with low power consumption
- 6-inch pigtail cable with 8-pin micro M12 connector for flexible wiring
- Durable plastic construction suitable for industrial applications
- Compliant with multiple safety certifications for reliable performance
Technical Specs of 440N-Z21SS2H
| Specification | Details |
|---|---|
| Product Family | SensaGuard |
| Housing Style | Plastic Rectangular Flat Pack |
| Assured Sensing Distance | 25 mm (0.98 in) |
| Safety Outputs | 2 x PNP, 0.2 A max |
| Auxiliary Output | 1 x PNP, 0.2 A max |
| Operating Voltage | 24 V DC ±10% / -15% |
| Connection | 6-inch pigtail with 8-pin micro M12 connector |
| LED Indicators | Status/Diagnostic LED for door and fault detection |
| Operating Temperature | -25 to +70 °C (-13 to +158 °F) |
| Ingress Protection | IP66, IP67, IP69K ratings |
Applications / Use Case
The Allen Bradley 440N-Z21SS2H safety switch is ideal for protecting personnel and equipment by monitoring the position of guards, doors, or gates in industrial automation settings. Its non-contact sensing technology reduces mechanical wear and provides reliable operation in harsh environments including washdown and dust-prone areas due to its high ingress protection ratings. Typical applications include machine safety interlocks, access control on industrial machinery, conveyor guarding, and robotic cell safety. The switch’s diagnostic LED feature facilitates quick status checks and troubleshooting, reducing downtime and maintenance efforts. It integrates well into safety control systems requiring SIL (Safety Integrity Level) or PLe Category 4 certification, supporting compliance with rigorous safety standards.Related Resources
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