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Help Center220V to 24V 26V Isolation Transformer for PLC and Automation System Power Supply
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As a professional manufacturer with a strong focus on industrial electrical components, Jinhua Dika Electrical Equipment Co., Ltd. specializes in providing reliable power solutions for automation systems. Our 220V to 24V/26V Isolation Transformer is engineered specifically to deliver clean, stable, and isolated power to sensitive PLCs and automation equipment. With an annual export value reflecting our global reach and a commitment to stringent quality management systems, we design this transformer to be a cornerstone of system reliability, protecting your valuable control systems from voltage fluctuations, noise, and ground loop issues commonly found in industrial environments.
This isolation transformer is a critical component for ensuring the longevity and consistent performance of your automation infrastructure. Below are its key features and benefits:
- Enhanced Equipment Protection: Provides galvanic isolation between the primary (220V) and secondary (24V/26V) circuits. This isolation barrier effectively blocks electrical noise, transients, and high-frequency disturbances from the mains supply from reaching your sensitive PLCs, sensors, and controllers, significantly reducing the risk of malfunctions, data corruption, and premature component failure.
- Voltage Stabilization: Offers a stable and precise output voltage, which is crucial for the correct operation of low-voltage control circuits. Fluctuations in the mains supply are mitigated, ensuring your automation system receives consistent power regardless of line variations.
- Safety and Compliance: Manufactured in facilities adhering to ISO9001 (Quality Management), ISO14001 (Environmental Management), and OHSAS18001 (Occupational Health and Safety) standards. The design prioritizes operational safety, providing a safe interface for technicians working on control panels by breaking the direct connection to the high-voltage line.
- Robust Construction: Built with high-grade silicon steel laminations and enameled copper windings to ensure low core losses, high efficiency, and minimal temperature rise. The robust enclosure, often made of metal, provides mechanical protection and aids in heat dissipation.
- Flexible Configuration: Available in various power ratings to match the load requirements of different automation setups, from small control cabinets to larger distributed systems. Mounting options typically include chassis mount for panel integration or DIN rail mount for easy installation in standard industrial racks.
- Wide Application Scope: Ideal for powering Programmable Logic Controllers (PLCs), Human-Machine Interfaces (HMIs), industrial PCs, servo drives, solenoid valves, and other 24V/26V AC/DC control devices within factory automation, process control, packaging machinery, and assembly lines.
To help you select the appropriate model, here are some typical technical specifications:
| Parameter | Specification / Typical Value |
|---|---|
| Primary (Input) Voltage | 220V AC, 50/60Hz |
| Secondary (Output) Voltage | 24V AC or 26V AC (Customizable) |
| Power Rating | Available from 50VA to 5000VA (Common models: 100VA, 250VA, 500VA, 1kVA) |
| Insulation Class | Class B (130°C) or Class F (155°C) |
| Efficiency | >90% (Typical at full load) |
| Cooling Method | Natural Air Cooling (AN) |
| Mounting | Chassis Mount / DIN Rail Mount (Optional) |
| Operating Temperature | -20°C to +40°C |
Choosing our isolation transformer means investing in the operational integrity of your automation systems. The direct benefits for your business include:
- Reduced Downtime: By protecting PLCs from electrical disturbances, you minimize unplanned stoppages and maintenance events.
- Extended Equipment Life: Clean power reduces thermal and electrical stress on components, leading to longer service intervals and a better return on investment.
- Improved System Accuracy: Stable voltage ensures analog sensors and communication modules function within their specified accuracy ranges.
- Simplified Troubleshooting: Isolation helps in localizing faults by separating the control circuit from the power circuit.
Backed by Jinhua Dika's experience in serving diverse global markets from North America and Western Europe to Southeast Asia and Africa, and supported by our efficient logistics from major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, this transformer represents a reliable link in your production chain. Our team of 11-50 dedicated professionals ensures every unit meets rigorous production standards. For a power supply solution that prioritizes protection, stability, and safety for your critical automation investments, contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ)
Q1: What is the main purpose of using an isolation transformer for a PLC system?
A1: The primary purpose is to provide galvanic isolation between the mains power and the PLC's low-voltage control circuit. This protects the sensitive electronic components within the PLC from power line noise, voltage spikes, surges, and potential ground loop problems, thereby enhancing system reliability and longevity.
Q2: Can this transformer be used for both 24V and 26V equipment?
A2: Our standard models are typically designed for a specific output voltage (either 24V AC or 26V AC). It is crucial to select the model that matches your equipment's rated voltage. We offer both options and can provide custom windings upon request to meet precise voltage requirements.
Q3: How do I determine the correct power rating (VA) needed for my application?
A3: You need to calculate the total volt-ampere (VA) requirement of all the devices the transformer will power. Sum the VA ratings or the current (A) ratings of your PLC, I/O modules, sensors, and other connected 24V/26V devices. It is recommended to choose a transformer with a power rating 20-30% higher than your calculated load to provide a safety margin and ensure cool, efficient operation.
Q4: Is this a step-down transformer only, or can it also be used for voltage step-up?
A4: This is specifically designed as a step-down isolation transformer, converting 220V AC to a lower, safer control voltage of 24V or 26V AC. It is not intended for step-up applications. The isolation function is integral to its design for protection.
Q5: What are the common mounting options available?
A5: To facilitate easy integration into control panels, our transformers are commonly available with chassis mounting holes for direct screw fixing or with brackets for DIN rail mounting (35mm standard rail). Please specify your preference when inquiring.
Q6: Does the transformer require any special cooling or ventilation?
A6: Standard models are designed for natural air cooling (AN). They should be installed in a well-ventilated enclosure or panel with adequate space around them to allow for heat dissipation. For high-power or high-ambient-temperature applications, additional ventilation or forced cooling may be considered.
Q7: Are the output terminals clearly marked for easy wiring?
A7: Yes, for safety and ease of installation, all terminals are clearly labeled (e.g., L, N for primary input; 24V, 0V for secondary output). The wiring diagram is also provided with the product to ensure correct and safe connection.
Q8: Can you provide transformers with different input voltages, like 110V or 380V?
A8: Yes. While this product listing focuses on the 220V input model, as a manufacturer, we have the capability to produce isolation transformers with various primary voltage ratings, including 110V, 380V, and 415V, to suit different regional power grids. Custom specifications can be discussed.
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