SolaHD SDN Redundancy Modules are designed for industrial applications where reliable DC control power is critical. These modules connect two compatible power supplies to a common DC load, helping provide redundancy, load sharing, and improved system availability in demanding automation and process control environments.

In a redundant configuration, the module monitors two connected power supplies and allows the system to continue operating if one supply fails. In high-power applications, redundancy modules can also support combined output capacity where appropriate. They are commonly used with SolaHD SDN-C, SDN-D, SDN-P, and other compatible power supplies capable of parallel operation.

Why Use SDN Redundancy Modules?

Redundancy modules are used when an industrial control system cannot afford to lose DC power from a single failed power supply. By connecting two compatible power supplies through a redundancy module, the system can continue feeding the load if one power supply drops out or requires service.

Typical Applications

• Critical production equipment
• Process control systems
• PLC and control panels
• Remote industrial locations
• Hazardous location applications
• High-reliability automation systems
• Mission-critical DC control power

Key Features

• DIN rail mounted redundancy modules
• Supports redundant DC power supply operation
• Common DC voltage feed from two power supplies
• Load sharing and high-availability configurations
• Compatible with SDN-C, SDN-D, SDN-P, and other parallel-capable supplies
• Diagnostic LEDs for status indication
• Relay output for DC power status monitoring
• Designed for harsh industrial environments

When Should You Choose a Redundancy Module?

Choose an SDN Redundancy Module when your application requires higher reliability than a single power supply can provide. These modules are commonly used in control panels where downtime is costly, safety is important, or continuous operation is required.

Need assistance selecting the correct redundancy module? Contact Wallco for SolaHD product selection and technical support.