ABB CP-A RU 1SVR427071R0000 Redundancy Power Module

The ABB CP-A RU (1SVR427071R0000) is a redundancy unit designed to ensure uninterrupted 24 V DC power delivery in critical industrial systems. It merges two independent power supply inputs into one robust, fault-tolerant output. Therefore, control cabinets and automation racks remain powered even if one supply fails. This module is ideal for systems where availability and reliability cannot be compromised.

2. Functional Highlights and Key Benefits

• Provides true redundancy by decoupling two input channels, each capable of up to 20 A, while delivering a combined output up to 40 A, thereby maintaining stable power under heavy load or during a supply failure. 

• Simplifies power architecture for critical automation systems, eliminating the risk of downtime caused by single-supply failure.

• Offers dependable switching between inputs without interrupting output power, which supports continuous operation of PLCs, drives, or control modules.

• Enables scalable power distribution when paired with multiple power supplies, making it suitable for both small and large installations.

3. Technical Data / Specifications

Electrical and Functional Data

• Input: 2 separate DC inputs (channels)

• Maximum input current per channel: 20 A (up to 30 A for 300 s) 

• Output: single DC output up to 40 A 

• Output voltage: 24 V DC (compatible with standard CP-range power supplies) 

Mechanical & Installation Data

• Mounting: DIN-rail (standard industrial rail) 

• Housing: robust enclosure suitable for industrial environments 

Compliance & Safety

• Standards: IEC/EN 60950-1, UL 60950, CAN/CSA C22.2 and other global certifications 

• Protection: built-in transient overvoltage protection, designed for safe decoupling of two supplies 

4. Typical Applications and Use Cases

The CP-A RU module excels in automation plants, process control systems, and critical infrastructure where continuous power is mandatory. For instance, it supports redundancy in PLC racks, distributed I/O systems, safety circuits, and control panels for machinery or production lines. In addition, developers use it to build fault-tolerant power architectures that prevent downtime during maintenance or supply failure. Therefore, it suits sectors from manufacturing to building automation and large-scale installations requiring high availability.

5. Reliability and Service Considerations

The redundancy unit is engineered for long-term dependable operation, with rugged design and certified safety compliance supporting stable DC supply under demanding conditions. In addition, its DIN-rail format simplifies installation and replacement, which reduces maintenance downtime. Global certification and industry compliance ensure compatibility with diverse electrical standards, enabling easier deployment across locations. Therefore, maintenance teams benefit from reliable redundancy without extensive rewiring or complex system changes.

6. FAQ

Q1: What is the main purpose of the CP-A RU 1SVR427071R0000 module?
This module merges two independent 24 V DC power inputs into a single redundant output, ensuring continuous power delivery even if one supply fails.

Q2: What is the maximum output current provided by this redundancy unit?
The module supports a combined output current up to 40 A on its DC output.

Q3: How many power supplies can be connected to this unit?
It accepts two separate input channels, each up to 20 A, which can be powered by two CP-range power supplies.

Q4: Is the CP-A RU compatible with standard automation DIN-rail cabinets?
Yes, the module mounts on standard DIN-rail, facilitating seamless integration into existing control cabinets.

Q5: Which applications benefit most from using this redundancy unit?
Critical automation systems, PLC racks, safety circuits, and mission-critical control panels benefit significantly from its fault-tolerant design.