20A DIN Rail Type Redundancy Module

Key Features

• Supports 1+1 and N+1 redundancy systems.
• Two channels for input and one for output.
• Suitable for 12V/24V/48V system redundancy operations.
• Output current up to 20A.
• Cooling by free air convection.
• Ultra-wide operating temperature range: -40°C to +80°C (derating required above +60°C).
• 32mm slim width for space-saving installation.
• Built-in 2-channel DC OK signal and alarm relay contacts for monitoring output status.
• Designed for installation on DIN Rail TS35/7.5 or TS35/15.
• Comes with a 3-year warranty.

Applications

• Industrial control systems
• Semiconductor fabrication equipment
• Factory automation
• Electro-mechanical apparatus

Product Description

The DRDN20 series is a 20A redundancy module designed to enhance the operational reliability of power supply systems. It supports 12V, 24V, and 48V input voltages and is compatible with both N+1 and 1+1 redundancy configurations. The module features two DC input channels and a single output. Utilizing MOSFET technology, it effectively reduces heat loss and minimizes voltage differences between input and output. Integrated DC OK relay contacts provide output status monitoring. The DRDN20 operates across an ultra-wide temperature range (-40°C to +80°C) and boasts a compact 32mm width.

Model Encoding

The model number follows the format DRDN20 - [Input Voltage]. For example, DRDN20-24 indicates a 24V input version with a 20A output capacity for the DIN Rail Redundancy Module.

Specifications

Block Diagram

The block diagram illustrates the module's internal connections. Two input voltage sources (Vin 1 and Vin 2) are connected to the DRDN20 module. The module provides a single output voltage (Vout) and a functional ground (FG) connection. Additionally, it features two DC OK alarm signals (Alarm1 and Alarm2), typically implemented as relay contacts, which indicate the status of the power supply units.

DC OK Relay Contact

The DC OK relay contacts have the following ratings and behavior:

• Contact Ratings (max.): 30Vdc / 1A resistive load.
• Contact Close (DC OK): Occurs when the PSU is turned on and operating correctly.
• Contact Open (DC Fail): Occurs when the PSU turns off or experiences over/under input voltage conditions.

Derating Curves

Derating Curve: This graph illustrates the relationship between ambient temperature and the maximum load percentage the module can handle. It shows that the module can operate at full load up to approximately 60°C, after which derating is necessary as temperature increases.

Output Derating VS Input Voltage: This graph displays the output load percentage that can be sustained across various input voltage levels. The module is designed to maintain its rated output load across its specified input voltage ranges (e.g., 12V, 24V, 48V nominal inputs).

Typical Application Notes

1+1 Redundancy

In a 1+1 redundancy setup, one additional Power Supply Unit (PSU) is used as a backup to ensure continuous operation. Two AC-DC Power Supplies, each rated for 20A, are connected to the DRDN20 module, which then provides a combined 20A output to the load.

1+N Redundancy

For increased reliability, a 1+N redundancy configuration uses multiple PSUs as redundant units. This setup involves connecting several AC-DC Power Supplies (e.g., 20A each) to the DRDN20 module, which aggregates their output to supply the load.

Single Use

Connecting a single PSU to the DRDN20 module can help reduce stress on the MOSFETs within the PSU, thereby enhancing its overall reliability. This configuration involves one AC-DC Power Supply connected to the DRDN20, which then outputs to the load.

Mechanical Specifications

Dimensions

The module has dimensions of 32mm (Width) x 125.2mm (Height) x 102mm (Depth).

Terminal Pin Assignments

TB1, TB2 Terminals:

TB3 Terminals:

Installation Instruction

This series is compatible with DIN Rail TS35/7.5 or TS35/15. For detailed installation procedures, please refer to the official Instruction Manual available at: MEAN WELL Manuals.

Important Notes

• All parameters are measured under normal input conditions (12V/24V/48V), rated load, and at an ambient temperature of 25°C, unless otherwise specified.
• Derating may be required at higher ambient temperatures; consult the derating curve for details.
• For operating altitudes above 2000m (6500ft), derating of 3.5%/1000m for fanless models and 5%/1000m for fan models applies.
• The power supply is considered an independent unit. The final equipment must comply with EMC directives. Refer to EMI testing guidelines for component power supplies for EMC compliance.
• Product Liability Disclaimer: For detailed information, please refer to the disclaimer page.

GTIN Code Information

For GTIN code search, please visit: MEAN WELL GTIN Search.