Introduction
This manual provides essential instructions for the safe installation, operation, and maintenance of the Pizzato NS D4AZ1SMK-F41 Safety Locking Switch with Actuator and RFID Technology. Please read this manual thoroughly before installation and operation to ensure proper function and safety.
The Pizzato NS D4AZ1SMK-F41 is a safety device designed to monitor the position of guards and doors, preventing access to hazardous areas when machinery is in operation. It incorporates RFID technology for enhanced security and tamper resistance.
Safety Information
WARNING: Improper installation or use of this device can result in serious injury or death. Always follow local and national safety regulations and standards (e.g., OSHA, EN ISO 13849-1).
- Only qualified personnel should install, operate, and maintain this device.
- Disconnect all power before performing any installation, maintenance, or troubleshooting.
- Ensure the safety function is tested regularly according to applicable standards.
- Do not bypass or tamper with the safety device.
Product Overview
The Pizzato NS D4AZ1SMK-F41 is a compact safety locking switch featuring an integrated actuator and RFID technology. Its robust design is suitable for industrial environments requiring high levels of safety and reliability.

Figure 1: Pizzato NS D4AZ1SMK-F41 Safety Locking Switch. This image shows the safety locking switch, which is primarily dark gray with a red top section. The top section features screw points and an opening for the actuator. The main body is rectangular with visible screws and a smooth finish.
Key Features:
- Safety Locking Mechanism
- Integrated Actuator
- RFID Technology for tamper-proof identification
- Durable construction for industrial applications
Setup and Installation
Before installation, ensure the mounting surface is clean, flat, and capable of supporting the device. Refer to the technical specifications for mounting dimensions and torque requirements.
Installation Steps:
- Mounting the Switch: Securely attach the main switch body to the stationary part of the guard or machine frame using appropriate fasteners.
- Mounting the Actuator: Attach the actuator to the movable part of the guard or door. Ensure proper alignment with the switch's entry slot. The actuator must enter the switch without obstruction and fully engage the locking mechanism.
- Electrical Connection: Connect the switch to the safety control circuit according to the wiring diagram provided in the product's technical documentation (not included in this manual). Ensure all connections are secure and properly insulated.
- RFID Configuration: If specific RFID tag configuration is required for your system, follow the instructions provided with your safety controller. The switch uses RFID for unique actuator identification.
- Initial Test: After installation, perform a functional test to verify that the safety locking switch operates correctly. Ensure the guard cannot be opened when the machine is in a hazardous state and that the machine cannot start if the guard is open or the switch is tampered with.
Operating Instructions
The Pizzato NS D4AZ1SMK-F41 operates as part of a safety interlock system. Its primary function is to ensure that machine operation is only possible when the associated guard or door is closed and locked.
Normal Operation:
- When the guard/door is closed, the actuator enters the switch head.
- The RFID technology identifies the actuator, and the switch sends a signal to the safety controller indicating the guard is closed and identified.
- If the machine is in a safe state, the safety controller can then command the switch to lock the actuator, preventing the guard from being opened.
- When access to the hazardous area is required, the machine must first be brought to a safe stop.
- The safety controller then commands the switch to unlock the actuator, allowing the guard/door to be opened.
Note: The specific sequence of locking/unlocking and machine operation is determined by the overall safety control system design.
Maintenance
Regular maintenance is crucial to ensure the continued reliable operation of the safety locking switch.
Recommended Maintenance Schedule:
- Daily/Shiftly: Visually inspect the switch and actuator for any signs of damage, wear, or misalignment. Ensure the guard operates smoothly and the actuator engages correctly.
- Weekly/Monthly: Perform a functional test of the safety circuit. Verify that the machine cannot start if the guard is open and that the guard remains locked when required. Check all electrical connections for tightness.
- Annually: Conduct a thorough inspection of the entire safety system, including the switch. Check for excessive wear on the actuator or switch head. Replace any damaged components immediately.
Cleaning: Use a soft, damp cloth to clean the exterior of the switch. Do not use abrasive cleaners or solvents that could damage the housing.
Troubleshooting
This section provides basic troubleshooting steps for common issues. For complex problems, consult a qualified technician or Pizzato technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Switch does not lock. | Actuator not fully inserted; power supply issue; faulty wiring; safety controller fault. | Check actuator alignment; verify power supply; inspect wiring; consult safety controller manual. |
| Machine does not start with guard closed. | Switch not signaling "closed" state; actuator not recognized by RFID; safety circuit fault. | Ensure actuator is fully engaged; check RFID status indicators (if available); verify safety circuit integrity. |
| Guard cannot be opened. | Switch remains locked; power supply issue to unlock mechanism; safety controller fault. | Ensure machine is in safe state; check power to unlock solenoid; consult safety controller manual. |
Specifications
The following specifications are for the Pizzato NS D4AZ1SMK-F41 Safety Locking Switch. For complete technical data, refer to the official Pizzato product datasheet.
- Model: NS D4AZ1SMK-F41
- Series: NS Series
- Type: Safety Locking Switch with Actuator and RFID Technology
- Dimensions: 8 x 3 x 8 inches
- Weight: 1.15 Pounds
- Manufacturer: Pizzato
- ASIN: B0FDSKFWNR
- Technology: RFID for actuator identification
- Further electrical and environmental specifications are available in the full technical datasheet.
Warranty Information
Pizzato products are manufactured to high standards and are typically covered by a manufacturer's warranty against defects in materials and workmanship. The specific warranty period and terms may vary by region and product. Please refer to the official Pizzato warranty statement available on their website or contact your local distributor for details.
Note: Damage resulting from improper installation, misuse, unauthorized modification, or failure to follow maintenance guidelines may void the warranty.
Support and Contact
For technical assistance, spare parts, or further information regarding the Pizzato NS D4AZ1SMK-F41 Safety Locking Switch, please contact Pizzato customer support or your authorized Pizzato distributor.
Pizzato Elettrica Official Website: www.pizzato.com
When contacting support, please have your product model (NS D4AZ1SMK-F41) and any relevant system details ready.



