TNR 25590 TNR25590
Product Name
Danfoss VLT® Series Auxiliary Power Supply & Control Interface Module (Model: TNR 25590 / TNR25590)
(Model Naming Interpretation:
- TNR: Core product prefix of Danfoss’s VLT accessory lineup, denoting “Control & Power Interface” modules—distinguishing them from power modules (e.g., MCO series) or communication modules (e.g., MCI series).
- 25590: Specific model identifier; the numerical code specifies the module’s key functions (auxiliary power regulation + multi-protocol communication) and compatibility with Danfoss VLT frequency converter ranges (e.g., VLT® AutomationDrive FC 302, VLT® HVAC Drive FC 102).
- Core Positioning: The “power and communication bridge for VLT drives,” integrating auxiliary power conversion and control signal management to enable safe, efficient interaction between frequency converters and industrial control systems.)
2. Product Description
The TNR 25590 (TNR25590) is a dedicated auxiliary power and control interface module developed by Danfoss for VLT® frequency converter systems, featuring “stable power supply, multi-protocol communication, industrial-grade robustness, and plug-and-play integration” as its core characteristics. It is primarily used in scenarios such as conveyor belt motor drive control, HVAC system fan/pump regulation, and manufacturing line servo motor synchronization. Its core value lies in solving two key challenges: 1) Providing reliable auxiliary power for converter control circuits (independent of main power fluctuations); 2) Enabling seamless data exchange between converters and PLCs/HMIs for real-time monitoring and control. Key advantages are reflected in four areas:
2.1 Stable Auxiliary Power Supply
- Dual-Input Power Regulation: Accepts a wide range of AC input voltages (110-240 V AC, 50/60 Hz) and converts it to a stable 24 V DC output (4 A maximum current) for powering VLT converter control circuits, external sensors (e.g., motor temperature probes), and low-power auxiliary devices (e.g., status LEDs). The built-in voltage regulator ensures output stability (±2% tolerance) even during main power fluctuations (±15%), preventing converter control errors caused by voltage spikes or dips.
- Power Backup Support: Integrates a backup capacitor that maintains 24 V DC output for up to 100 ms during short power interruptions (e.g., grid flickers). This critical hold-up time ensures the converter retains operational data and avoids unexpected shutdowns—critical for processes requiring continuous operation (e.g., food processing conveyors).
- Overload & Short-Circuit Protection: The 24 V DC output includes current limiting (4.5 A max) and short-circuit shutdown (response time <100 μs) to protect both the module and connected devices (e.g., sensors, PLC inputs) from damage. The module automatically recovers once the fault is cleared, eliminating the need for manual reset.
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