1. Introduction
This instruction manual provides essential information for the safe and effective installation, operation, and maintenance of the Legrand 412544 CX3 Contactor. Please read this manual thoroughly before installation and use, and retain it for future reference. This device is designed for controlling electrical circuits, typically for switching loads in residential, commercial, or industrial applications.
2. Safety Information
WARNING: Electrical installation and maintenance should only be performed by qualified and authorized personnel. Failure to follow these instructions can result in electric shock, fire, or serious injury.
- Always disconnect power at the main circuit breaker or fuse box before installing, servicing, or removing the contactor.
- Ensure all wiring complies with local and national electrical codes.
- Verify the voltage and current ratings of the contactor are suitable for the intended application.
- Do not operate the contactor if it appears damaged.
- Use appropriate personal protective equipment (PPE) during installation and maintenance.
3. Product Overview
The Legrand 412544 CX3 Contactor is a modular device designed for DIN rail mounting. It features two Normally Open (NO) contacts and is rated for 25 Amperes at 230-250 Volts AC. The contactor includes a manual override function for testing or temporary operation.
Figure 1: Legrand 412544 CX3 Contactor. This image displays the Legrand 412544 CX3 Contactor. Visible features include the 25A rating, 250V operating voltage, and the Legrand brand logo. The front panel shows the manual override lever with 'AUTO' and 'O' (Off) positions, and screw terminals labeled A1, A2 for the coil, and 1, 2, 3, 4 for the main contacts.
Key Features:
- Contact Type: 2 Normally Open (NO) contacts
- Rated Current (I max): 25 A
- Operating Voltage (Ue): 230-250 V AC
- Control Voltage: 230 V AC
- Number of Modules: 1 (for DIN rail mounting)
- Operating Mode: ON-OFF
- Terminal Type: Screw terminals
- Actuator Type: Piston
- Contact Material: Alloy steel
4. Setup and Installation
Before proceeding, ensure power is disconnected as per Section 2, "Safety Information."
4.1 Mounting
- Locate an appropriate position on a standard DIN rail within an electrical enclosure.
- Clip the contactor onto the DIN rail. Ensure it is securely fastened.
4.2 Wiring
The contactor features screw terminals for secure electrical connections. Refer to the markings on the device for correct wiring.
- Coil Terminals (Control Circuit): Connect the control voltage (230V AC) to terminals A1 and A2. A1 is typically for the phase/live wire, and A2 for the neutral.
- Main Contacts (Power Circuit):
- Connect the incoming power supply to terminals 1 and 3.
- Connect the load to terminals 2 and 4.
- Ensure all connections are tight and secure to prevent loose contacts and overheating.
- Double-check all wiring against the electrical diagram of your installation before restoring power.
5. Operating Instructions
Once installed and wired correctly, the contactor operates by applying voltage to its control coil (A1-A2).
- Automatic Operation: When the control voltage (230V AC) is applied to terminals A1 and A2, the contactor coil energizes, closing the main contacts (1-2 and 3-4). This allows power to flow to the connected load. When the control voltage is removed, the coil de-energizes, and the contacts open, disconnecting the load.
- Manual Override: The contactor is equipped with a manual override lever on the front panel.
- Move the lever to the 'AUTO' position for normal automatic operation via the control circuit.
- Move the lever to the 'O' (Off) position to manually open the contacts, regardless of the control circuit status. This can be used for maintenance or to ensure the load remains off.
- Some models may also feature a manual 'ON' position for continuous closure of contacts, independent of the control circuit. Refer to the specific markings on your device.
6. Maintenance
The Legrand 412544 CX3 Contactor is designed for reliable, long-term operation with minimal maintenance. However, periodic checks are recommended.
- Visual Inspection: Periodically inspect the contactor for any signs of physical damage, discoloration, or loose connections.
- Terminal Tightness: Ensure all screw terminals remain tight. Loose connections can lead to overheating and potential failure.
- Cleaning: If necessary, gently clean the exterior of the contactor with a dry, lint-free cloth. Do not use liquids or abrasive cleaners.
- Functionality Check: With power disconnected from the load circuit, test the manual override function to ensure smooth operation.
Important: Always disconnect power before performing any maintenance.
7. Troubleshooting
If the contactor is not functioning as expected, consider the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Contactor does not energize (contacts do not close) |
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| Contactor energizes but load does not receive power |
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| Contactor makes humming noise |
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If problems persist after attempting these solutions, contact a qualified electrician or Legrand customer support.
8. Specifications
| Brand | Legrand |
| Model Number | 412544 |
| Rated Current (I max) | 25 A |
| Operating Voltage (Ue) | 230-250 V AC |
| Control Voltage | 230 V AC |
| Contact Type | 2 Normally Open (NO) |
| Number of Modules | 1 |
| Operating Mode | ON-OFF |
| Terminal Type | Screw terminals |
| Circuit Type | 2-way |
| Actuator Type | Piston |
| Contact Material | Alloy steel |
| Mounting | DIN Rail |
9. Warranty and Support
For information regarding product warranty, technical support, or service, please refer to the official Legrand website or contact your local Legrand distributor. Keep your purchase receipt as proof of purchase.
Legrand Website: www.legrand.com
