When your system relies on consistent, uninterrupted power delivery, redundancy modules are imperative. Their purpose is to disengage one PSU from another, ensuring full and continued power in the event of malfunction.

With a power supply redundancy module, an electrical system will continue to operate even if one PSU fails. At RS, we work with world-renowned manufacturers to provide you with quality modules for your next project.

Whether you need a MEAN WELL redundancy module or something more specialized, we can help. With fast shipment from our Texas distribution center, we'll get your new components to you in no time.

Browse our online catalog today to find a compatible redundancy module. You can use the search filter function to narrow down your results by manufacturer, mounting type, and more.

What are redundancy modules?

A redundancy module is used to disconnect one power supply from another. Typically installed between two PSUs, diode and O-Ring redundancy modules create a permanent backup supply concept.

Where safety and peace of mind are concerned, these modules are some of the most important power supply accessories.

Redundancy modules can be combined with PSUs to improve overall efficiency, stability, and availability within a system. Upon loss of primary power supply, the redundancy module enables the system to automatically rely on another stable PSU.

The fastest way to find the correct redundancy module for your application is to check and confirm the compatibility and manufacturer of your power supply. Almost all of the redundancy modules in our catalog feature Din-Rail mounting, but you could require one with screw terminal.

Which types of redundancy modules are available?

Active redundancy modules

Power supply O-ring modules are a key type used across multiple sectors and applications within them. These modules consistently monitor the input voltage, the load current and the wiring, which together make up the entire redundant system.

Quality examples are featured in the Siemens O-ring redundancy module range, which includes models suitable for use with Siemens SITOP power supply units.

Diode modules

With a diode redundancy module, two power supply units are decoupled. In the event of a short circuit at the output point of one of the power supply units, or in the connecting supply line, the diode no longer enables current. In turn, the power supply is disconnected.

We provide diode redundancy modules from Phoenix Contact. If you'd like some advice before you order a new module with us, please don't hesitate to contact our expert team.

What are the benefits of using redundancy modules?

Power supply redundancy modules can be used across a variety of applications, primarily in commercial settings. No matter the type you implement, the benefits include:

Continuous, remote system monitoring
Rapid detection of critical operating states or faults
Continued supply of DC power
Little-to-no maintenance required
Protection against system shutdown, despite minor faults

When might a redundant power supply module be needed?

Industrial controls

Vital infrastructure within a commercial setting needs the security of a reliable and constant power supply. From electronic ventilation systems to gateways and barriers, dual supplies give managers and employees ultimate peace of mind. In any system relying on two PSUs, a redundancy module is necessary.

Security systems

Similarly, alarms and indication systems need to be responsive and constantly powered. To prevent the possibility of PSU failure impacting vital resources, redundancy modules should be used. Even if one power supply malfunctions, protected data, information, or materials will be safeguarded by the backup supply.

Commercial automation

On the production line, efficiency is critical. Automated systems rely on a constant power supply and might not always be monitored by employees in a factory setting. Redundancy modules therefore play an important role in keeping automated systems supplied with power, regardless of a minor PSU fault or variation in current.

Buy quality redundancy modules with RS Americas

We're proud to provide electrical products from industry-leading manufacturers. When you come to us, you can rest assured that you'll find durable redundancy modules to suit your application.

With ECIA, CTPAT, and NAED certificates backing us, we're an accredited provider. Along with offering great prices on the extensive range of products in our catalog, we offer quick and easy delivery from our Texas distribution center.

Order online today to complete your setup with the parts you need. If you have any questions about redundancy modules or how to use them, please feel free to get in touch with the team. You can also head over to our expert hub for top tips and the latest news in tech.