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ST HD421MK Pizzato ST H series safety sensor
Pizzato ST HD421MK RFID safety sensor from the ST H series, featuring 24 V DC operation, non-contact RFID detection, two safety inputs, two safety outputs and an integrated M12 stainless steel connector.
£89.74
Why Choose the Pizzato ST HD421MK Safety Sensor?
The Pizzato ST HD421MK is a compact and reliable RFID-coded non-contact safety sensor from the Pizzato ST H series, designed for monitoring movable guards, safety doors and access points on industrial machinery. Its electronic RFID technology provides dependable guard position detection without mechanical switching contacts, making it suitable for modern machine safety and automation systems.
The ST H series combines coded RFID detection with a robust technopolymer housing for demanding industrial safety applications. The ST HD421MK features an integrated M12 stainless steel connector and is supplied without an actuator, allowing a compatible actuator to be selected separately according to the machine guarding arrangement.
With 24 V DC operation, two safety inputs, two safety outputs, one signalling output and one programming input, the ST HD421MK provides flexible integration with industrial safety control systems. Its compact design and non-contact operation make it suitable for machine guards that are frequently opened and closed.
Key Advantages
- Compact RFID safety sensor designed for machine guarding.
- Non-contact coded detection provides reliable guard monitoring without mechanical switching contacts.
- 24 V DC operation for straightforward industrial control integration.
- Integrated M12 stainless steel connector for robust industrial connection.
- Supplied without an actuator, allowing selection of a suitable compatible actuator.
- IP67 and IP69K protection for demanding industrial environments.
Key Features
- Pizzato ST H series RFID safety sensor.
- ST HD421MK product configuration.
- Non-contact RFID-coded detection technology.
- 2 safety inputs IS1–IS2.
- 2 safety outputs OS1–OS2.
- 1 signalling output O3.
- 1 programming input I3.
- 24 V DC operating supply.
- Integrated M12 stainless steel connector.
- Sensor supplied without actuator.
- Compatible with Pizzato ST H series actuator configurations.
- Electronic safety monitoring without mechanical switching contacts.
Reliable Safety Monitoring for Industrial Machinery
RFID safety sensors such as the Pizzato ST HD421MK monitor the position of machine guards without requiring mechanical electrical contacts between the sensor and actuator. When a compatible coded actuator is correctly positioned, the safety system can confirm the guard position and permit the protected machine function to operate.
The ST H series is designed for machine builders and industrial automation engineers requiring dependable guard monitoring and straightforward integration with safety control systems. The non-contact design avoids mechanical wear associated with conventional safety switches, while the separate sensor and actuator arrangement provides flexibility when designing machine guarding.
Typical Applications
- Industrial machine safety doors and access guards.
- Automated production and processing machinery.
- Robotic cells and guarded automation equipment.
- Packaging and material handling systems.
- Manufacturing machinery requiring non-contact guard monitoring.
- OEM machine-building and industrial safety applications.
Technical Specifications
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| Connection | M12 connector | |
|---|---|---|
| Sensing Principle | RFID (coded) | |
| Contacts | 2 safety outputs (OSSD) + 1 signalling | |
| Supplied As | Sensor only | |
| Product Series | Pizzato ST H (RFID) | |
| IP Rating | IP67, IP69K | |
| Manufacturer | Pizzato Elettrica | |
| Series | ST H series | |
| Model | ST HD421MK | |
| Product type | RFID safety sensor | |
| Technology | RFID non-contact detection | |
| Application | Machine guarding, safety interlocking and industrial automation | |
| Supply voltage | 24 V DC | |
| Safety inputs | 2, IS1–IS2 | |
| Safety outputs | 2, OS1–OS2 | |
| Signalling output | 1, O3 | |
| Programming input | 1, I3 | |
| Connection type | Integrated M12 stainless steel connector | |
| Actuator | Not included | |
| Housing material | Technopolymer | |
| Ambient temperature | -25°C to +70°C | |
| Protection rating | IP67 according to EN 60529 and IP69K according to ISO 20653 | |
| Safety integrity level | SIL 3 according to EN 62061 | |
| Performance level | PL e, Category 4 according to EN ISO 13849-1 | |
| Interlocking type | Type 4 coded non-contact interlocking according to EN ISO 14119 | |
| HS Code | 85369095 |
Frequently Asked Questions
What is the Pizzato ST HD421MK used for?
The Pizzato ST HD421MK is an RFID safety sensor used to monitor machine guards, safety doors and access points in industrial automation and machine safety applications.
What technology does the ST HD421MK use?
The sensor uses RFID-coded non-contact detection to monitor the position of a compatible actuator without mechanical switching contacts.
What supply voltage does the sensor require?
The Pizzato ST HD421MK operates from a 24 V DC supply for integration into industrial safety control systems.
Does the ST HD421MK include an actuator?
No, the ST HD421MK is supplied without an actuator, allowing a compatible Pizzato actuator to be selected separately for the required machine guarding installation.
What connection does the ST HD421MK use?
The ST HD421MK features an integrated M12 stainless steel connector for connection to an industrial safety control system.
Trusted by Machine Builders Worldwide
Pizzato ST H series safety sensors provide machine builders and automation engineers with reliable RFID-coded guard monitoring, robust environmental protection and flexible integration into modern industrial safety systems.
