AXAUCHOZ MC-50, MC-65
AXAUCHOZ MC-50 / MC-65 Series Contactor User Manual
Model: MC-50, MC-65 | Brand: AXAUCHOZ
1. Introduction and Overview
This manual provides essential information for the safe and effective installation, operation, and maintenance of your AXAUCHOZ MC-50 or MC-65 series AC Contactor. These contactors are designed for industrial applications, primarily for controlling electric motors, heating elements, lighting, and other electrical loads. Please read this manual thoroughly before installation or operation.
The specific model covered by this manual is the MC-50, 1A1B_24VAC variant, though the general principles apply to other MC-50 and MC-65 configurations.
2. Safety Information
WARNING: Electrical shock hazard. Improper installation or operation can result in serious injury or death. Always follow local electrical codes and safety regulations.
- Installation and maintenance should only be performed by qualified personnel.
- Ensure all power is disconnected and locked out before performing any work on the contactor or associated circuitry.
- Verify the voltage and current ratings of the contactor match the application requirements.
- Do not operate the contactor if it is damaged or shows signs of wear.
- Ensure proper grounding and short-circuit protection are in place.
- Avoid touching live terminals.
3. Product Description and Features
The AXAUCHOZ MC-50 and MC-65 series contactors are robust electromechanical switching devices designed for reliable performance in demanding industrial environments. They are primarily used for remote control of power circuits, offering high breaking capacity and long electrical life.
Figure 3.1: Front view of an AXAUCHOZ MC-50 Contactor. This image illustrates the main power terminals (1L1, 3L2, 5L3 for input; 2T1, 4T2, 6T3 for output) and the model designation. The appearance of the MC-65 model will be similar but with different current ratings.
Key Features:
- High-quality construction for durability and reliability.
- Designed for AC power circuits.
- Available in various coil voltages (e.g., 24VAC, 110VAC, 220VAC, 380VAC).
- Multiple contact configurations (e.g., 1A1B, 2A2B) to suit different control needs.
- Compact design for space-saving installation.
4. Setup and Installation
Before beginning installation, ensure you have read and understood the safety information in Section 2. All wiring must comply with national and local electrical codes.
4.1 Mounting:
The contactor can be mounted on a standard DIN rail or secured using screws through the mounting holes provided. Ensure the mounting surface is stable and free from excessive vibration. Allow adequate ventilation around the contactor to prevent overheating.
4.2 Wiring:
- Power Circuit Wiring: Connect the incoming power supply to the main terminals labeled 1L1, 3L2, 5L3. Connect the load (e.g., motor) to the corresponding output terminals 2T1, 4T2, 6T3. Ensure all connections are tight and secure to prevent loose contacts and overheating.
- Control Circuit Wiring: Connect the control voltage (e.g., 24VAC for the MC-50, 1A1B_24VAC model) to the coil terminals, typically labeled A1 and A2. The coil voltage must match the contactor's specified coil voltage.
- Auxiliary Contacts: If your contactor includes auxiliary contacts (e.g., 1 normally open (NO) and 1 normally closed (NC) for 1A1B configuration), connect them according to your control circuit design. These are typically used for interlocking, signaling, or control logic. Refer to the terminal markings on the side of the contactor for specific auxiliary contact numbers.
- Grounding: Ensure the contactor and associated equipment are properly grounded as per electrical codes.
After wiring, double-check all connections for correctness and tightness before applying power.
5. Operating Instructions
The AXAUCHOZ contactor operates by energizing its electromagnetic coil. When the rated control voltage is applied to the coil terminals (A1 and A2), the coil generates a magnetic field that pulls the armature, causing the main power contacts to close (or open, depending on the contact type). This action connects (or disconnects) the power to the load.
- Energizing the Coil: Apply the specified control voltage to the A1 and A2 terminals. The contactor will audibly click as the contacts engage.
- De-energizing the Coil: Remove the control voltage from the A1 and A2 terminals. The magnetic field collapses, and the contacts will return to their original state (main contacts open, auxiliary NO contacts open, auxiliary NC contacts close).
- Visual Indication: Some contactors may have a visual indicator (e.g., a small window) that shows the state of the contacts (engaged/disengaged).
Ensure the operating environment is within the specified temperature and humidity ranges to ensure optimal performance and longevity.
6. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your contactor. Always disconnect power before performing any maintenance.
- Visual Inspection: Periodically inspect the contactor for any signs of physical damage, discoloration, or loose connections. Check for excessive dust or debris accumulation.
- Terminal Tightness: Over time, terminal screws can loosen due to vibration or thermal cycling. Periodically check and re-tighten all terminal connections to the specified torque.
- Cleaning: Use a dry, lint-free cloth or compressed air to remove dust and dirt from the contactor's exterior. Do not use solvents or abrasive cleaners.
- Contact Wear: While not typically user-serviceable, excessive arcing or pitting on the main contacts can indicate wear. If significant wear is observed, the contactor may need replacement.
7. Troubleshooting
This section provides guidance for common issues. For complex problems, consult a qualified electrician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Contactor does not energize (no click) | No control voltage; Incorrect control voltage; Open coil circuit; Damaged coil. | Check control circuit power supply; Verify coil voltage matches supply; Check coil continuity with multimeter; Replace contactor if coil is open. |
| Contactor hums loudly or chatters | Low control voltage; Mechanical obstruction; Damaged shading coil; Loose mounting. | Verify control voltage is within specifications; Check for foreign objects; Replace contactor if shading coil is damaged; Secure mounting screws. |
| Contactor overheats | Overload condition; Poor ventilation; Loose power connections; Incorrect contactor size. | Check load current; Ensure adequate airflow; Tighten power terminals; Verify contactor is rated for the load. |
| Contacts are pitted or welded | Excessive arcing; Overcurrent; Frequent switching; Short circuit. | Investigate cause of arcing/overcurrent; Reduce switching frequency if possible; Replace contactor. |
8. Specifications
The following specifications apply to the AXAUCHOZ MC-50 and MC-65 series contactors. Specific ratings may vary by model variant.
| Attribute | Detail |
|---|---|
| Model Series | MC-50, MC-65 |
| Current Product Variant | MC-50, 1A1B_24VAC |
| Item Type | SWITCHES (Contactor) |
| Coil Voltage Options | 24VAC, 36VAC, 110VAC, 220VAC, 380VAC (varies by specific model) |
| Contact Configuration | 1 Normally Open (NO) + 1 Normally Closed (NC) for 1A1B; 2NO + 2NC for 2A2B (varies by specific model) |
| Origin | Mainland China |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches (approximate, for current variant) |
| Weight | 1.76 ounces (approximate, for current variant) |
9. Warranty and Support
For information regarding warranty coverage, terms, and conditions, please refer to the documentation provided at the time of purchase or contact the seller directly. AXAUCHOZ is committed to providing quality products.
For technical support or inquiries, please reach out to your point of purchase or the manufacturer's authorized service center. When contacting support, please have your product model number (MC-50 or MC-65) and specific variant (e.g., 1A1B_24VAC) ready.