Emerson DRDN20-24 Redundancy Module

Overview

The DRDN20-24 is a DIN rail-mounted redundancy module for 24V DC systems. It connects two independent power supplies in parallel to ensure continuous operation during a failure. Advanced MOSFET technology reduces voltage drop and heat loss. This module suits industrial automation, factory control, and electromechanical equipment. It provides high reliability with minimal maintenance.

Technical Specifications

• Model Number: DRDN20-24

• Manufacturer: MEAN WELL (used in Emerson systems)

• Function: 24V DC Redundancy Module

• Rated Current: 20A

• Input Voltage: 24V DC (±20%)

• Input Channels: 2 independent DC inputs

• Output Channels: 1 DC output

• Technology: MOSFET-based switching

• Voltage Drop: Typically 0.25–0.5V

• Efficiency: >99%

• Operating Temperature: −40°C to +80°C

• Storage Temperature: −40°C to +85°C

• Cooling Method: Natural air convection

• Mounting Type: DIN rail (TS-35/7.5 or TS-35/15)

• Dimensions (W×H×D): 32 × 125.2 × 102 mm

• Weight: 0.6 kg

• Protection Features: Reverse polarity, short circuit, overload

• Redundancy Support: 1+1 and N+1 systems

• Input Voltage Selection: Suitable for 12V, 24V, or 48V systems (factory set for 24V DC)

• Max Peak Current: 30A (5 seconds, no damage)

• DC OK Signal: Built-in 2 channels with alarm relay contact