Overview
The Allen-Bradley 440G-TZS21UTRH is a Guardmaster TLS-Z GD2 guard locking interlock switch designed for machine safety applications. This positive-mode, tongue-operated switch locks a machine guard closed until power is isolated then keeps the power isolated while the guard is open. The device features OSSD (Orderly Shutdown Safety Outputs) that are enabled only when the actuator is locked and the RF target is sensed. TLS-Z guard locking switches are classified according to ISO 14119 as Type 4 switching devices with RFID targets classified as having a high level of coding.
Key Features
- Solenoid-operated with 24 Volt AC/DC supply
- 2 Safety PNP contacts (0.2 Amp maximum) and 1 Auxiliary PNP contact (0.2 Amp maximum)
- Door position status output for auxiliary monitoring when actuator key is inserted or withdrawn
- M12 8-pin connector with stainless steel contact material
- IP66, IP67, IP69K enclosure ratings (NEMA 3, 4X, 12, 13)
- Manual release feature available for Power-to-Release (TLSZR) models
Technical Specifications
| Specification | Value |
| Catalog Number | 440G-TZS21UTRH (right-hand door) |
| Series | Guardmaster TLS-Z GD2 |
| Supply Voltage | 24 VDC |
| Safety Contacts | 2 x PNP (0.2 Amp maximum) |
| Auxiliary Contacts | 1 x PNP (0.2 Amp maximum) |
| Connector Type | M12 8-Pin |
| Switch Type | Guard lock switch with solid state contacts |
| Actuator | Flexible |
| Contact Material | Stainless Steel |
| Enclosure Rating | NEMA 3, 4X, 12, 13; IP66, IP67, IP69K |
| Operating Temperature | -10 to 60°C |
| Material | PBT |
| Weight | 1.49 lb |
| Safety Classification | ISO 14119 Type 4 |
| Certifications | CE Marked, c-UL-us (UL 508), TÃœV |
Typical Applications
- Machinery interlocking systems for industrial presses and stamping equipment
- Access guard control on automated packaging and assembly machinery
- Safety gate and enclosure locking on production lines
- Hazardous area machine guarding requiring Type 4 safety classification
- Food processing, automotive, and heavy manufacturing guard control systems
Compatibility & Replacements
This model is for use with flexible actuator only, catalog number 440G-A27143. The 440G-TZS21UTRH is the right-hand door version; a left-hand variant (440G-TZS21UTLH) is also available with identical electrical specifications. For safety relay integration, Rockwell recommends the Guardmaster safety relay family (440R-D22R2, 440R-D22S2, 440R-EM4R2D) for application control logic. Direct replacement units maintain pin-for-pin compatibility with prior TLS-Z GD2 configurations.
