1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the EUCHNER NZ1HS-3131-M Safety Switch. Please read this manual thoroughly before using the device to ensure proper function and to prevent potential hazards.
2. Safety Information
Warning: This device is a safety component. Improper installation or use can lead to serious injury or death. Always adhere to local and national safety regulations, including machine safety directives.
- Ensure power is disconnected before installation or maintenance.
- Only qualified personnel should install, operate, and maintain this device.
- Do not bypass or tamper with the safety functions of the switch.
- Regularly inspect the switch for damage or wear.
3. Product Overview
The EUCHNER NZ1HS-3131-M is a safety switch designed for monitoring the position of movable guards on machinery. It features a lever arm with a roller, providing reliable actuation. Its robust construction ensures durability in industrial environments.
Figure 1: EUCHNER NZ1HS-3131-M Safety Switch. This image shows the safety switch with its distinctive lever arm and roller, which is used for actuation.
Key Components:
- Housing: Protects internal components.
- Lever Arm with Roller: The actuating element that detects guard position.
- Connection Port: For electrical wiring (M20 x 1.5).
4. Setup and Installation
Proper installation is critical for the safety switch's functionality. Follow these steps carefully:
- Mounting: Securely mount the safety switch to a stable surface near the movable guard. Ensure the lever arm can be actuated freely by the guard.
- Wiring:
- Disconnect all power to the machine before wiring.
- Connect the electrical wiring to the M20 x 1.5 connection port.
- Use wires with a cross-section of 0.34 to 1.5 mm2.
- Ensure connections comply with the rated voltage of 230V AC / 24V DC and current rating of 4 Amps.
- Verify correct polarity for DC connections.
- Adjustment: Adjust the position of the switch and/or the guard so that the lever arm is actuated correctly when the guard is closed, and released when the guard is open. The switch should operate reliably throughout the guard's movement range.
- Testing: After installation, perform a functional test to ensure the safety switch operates as intended. Verify that the machine cannot start or stops immediately when the guard is opened.
5. Operating Instructions
The NZ1HS-3131-M safety switch operates in an ON-OFF mode, designed to monitor the state of a machine guard. When the guard is closed, the lever arm is actuated, changing the state of the internal contacts (4PST, SPDT terminal). This signals to the control system that the guard is in a safe position, allowing machine operation.
When the guard is opened, the lever arm is released, causing the contacts to switch state. This action should immediately stop or prevent the start of hazardous machine functions, ensuring operator safety.
Normal Operation Sequence:
- Guard Closed: Lever arm actuated, safety circuit closed (or open, depending on specific wiring and safety logic). Machine operation permitted.
- Guard Opened: Lever arm released, safety circuit opened (or closed). Machine operation interrupted or prevented.
6. Maintenance
Regular maintenance ensures the longevity and reliable operation of the safety switch.
- Visual Inspection: Periodically inspect the switch for any signs of physical damage, corrosion, or wear on the lever arm and roller.
- Cleaning: Keep the switch free from dust, dirt, and debris. Use a soft, dry cloth for cleaning. Avoid abrasive cleaners or solvents.
- Functional Check: Regularly test the switch's operation by opening and closing the guard to confirm it correctly interrupts or prevents machine operation.
- Connection Check: Ensure all electrical connections remain secure and free from corrosion.
If any damage or malfunction is detected, replace the switch immediately. Do not attempt to repair the safety switch.
7. Troubleshooting
This section addresses common issues you might encounter with the NZ1HS-3131-M safety switch.
| Problem | Possible Cause | Solution |
|---|---|---|
| Switch does not actuate when guard closes. | Incorrect alignment of switch or guard; damaged lever arm. | Adjust switch or guard position. Inspect and replace if lever arm is damaged. |
| Machine does not stop when guard opens. | Faulty wiring; damaged switch contacts; bypass of safety circuit. | Check wiring for proper connection and integrity. Test switch contacts. Ensure no unauthorized bypasses are present. Replace switch if faulty. |
| Intermittent operation. | Loose connections; excessive vibration; wear on mechanical parts. | Tighten all electrical connections. Secure switch mounting. Inspect for wear and replace if necessary. |
If troubleshooting steps do not resolve the issue, contact a qualified technician or EUCHNER support.
8. Specifications
Technical specifications for the EUCHNER NZ1HS-3131-M Safety Switch:
| Feature | Detail |
|---|---|
| Model Number | NZ1HS-3131-M |
| Operation Mode | ON-OFF |
| Actuating Element | Lever Arm with Steel Roller |
| Rated Insulation Voltage | 250 V |
| Rated Voltage | 230V AC / 24V DC |
| Current Rating | 4 Amps (Thermal Rated Current) |
| Switching Current | 1 mA @ 24V DC |
| Contact Type | 4PST |
| Terminal | SPDT |
| Connection | M20 x 1.5 |
| Connection Cross-Section | 0.34 ... 1.5 mm2 |
| International Protection Rating | IP54 |
| Product Dimensions (L x W x H) | 0.31 x 0.31 x 0.28 inches |
| Item Weight | 2 pounds |
| Material | Steel (Contact Material) |
9. Warranty and Support
Information regarding product warranty and customer support is typically provided with the product packaging or available on the manufacturer's official website. Please refer to EUCHNER's official documentation or website for details on warranty terms, technical support, and service options.
