Overview
The Allen-Bradley 440G-TZS21UTRH is an RFID-coded guard locking safety interlock switch designed to monitor doors, guards, and access panels in high-risk areas. This power-to-release model ensures the guard remains locked when power is removed, offering a fail-safe design. It operates on 24V DC, supports rear actuator entry, and features an IP69K-rated enclosure, suitable for washdown and harsh environments.
Key Features
- SIL 3 and PLe certified for Category 4 safety applications
- RFID-coded with high-level coded actuator per ISO 14119
- Power-to-release fail-safe—guard remains locked during power loss
- IP69K-rated enclosure for washdown and harsh industrial environments
- M12 8-pin micro connector with 0.2A maximum contact rating
- Solid-state contact construction for reliability
Technical Specifications
- Solenoid Voltage: 24V AC/DC
- Safety Contacts: 2 x PNP (0.2A max.)
- Auxiliary Contacts: 1 x PNP (0.2A max.) – door status
- Actuator Type: Fully-Flex
- Connector: 8-Pin Micro (M12)
- Operating Temperature: -10 to 60°C
- Enclosure Rating: NEMA 3, 4X, 12, 13, IP66, IP67, IP69K
- Material: PBT plastic housing with stainless steel contacts
- Safety Certification: SIL 3 / PLe Category 4
- CE, UL Listed, UKCA, RCM, KC certifications
Typical Applications
The 440G-TZS21UTRH is ideal for guard locking and machine safety in:
- Industrial machinery requiring fail-safe guarding
- Washdown and wet environments (IP69K rated)
- Robotic cells and automated production lines
- Access control for hazardous machine zones
- Safety-critical systems requiring SIL 3 / PLe certification
Compatibility & Replacements
The replacement actuator part number is 440G-A27143. This unit is compatible with other Guardmaster 440G TLS-Z GD2 series installations. Manual release capability available with power-to-release (TLSZR) models. Consult the official Rockwell Automation user manual (440G-UM002) for installation, wiring, and integration with PLC control systems.
