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ABB 3BSE038226R1 SS823

ABB 3BSE038226R1 SS823 is a Power Voting Unit (Voter and Over Voltage Protection module) designed for ABB 800xA High Integrity systems. It is used in redundant 24 V DC power supply architectures to combine and supervise redundant power sources while providing protection and diagnostic functions.

1. Product Identification

2. Main Function

The SS823 acts as a power voter in redundant power supply configurations:

• Accepts two redundant 24 V DC power supply inputs.
• Combines them into a single reliable 24 V DC output.
• Monitors input and output voltage conditions.
• Provides supervision signals to the connected control system.
• Protects against overvoltage and overcurrent conditions.

It is commonly installed between ABB power supplies (such as SD83x/SD85x series) and High Integrity controllers or I/O systems.

3. Technical Parameters

4. Key Features

• High Integrity / SIL3 capability
  Designed for safety-related ABB 800xA High Integrity applications and certified according to IEC 61508 SIL3 requirements.
• Redundant power management
  Supports redundant power supply arrangements to improve system availability.
• Integrated monitoring
  • Front-panel LED status indication
  • Voltage supervision relay output
  • Fault detection for voting element conditions
• Protection functions
  • Input overvoltage protection
  • Output overvoltage protection
  • Current limiting / overload protection
• Industrial environmental compatibility
  • ATEX Zone 2 approval
  • ISA-S71.04 G3 corrosive atmosphere compliance
  • Marine certifications available (ABS, BV, DNV-GL, LR)

5. Typical Applications

ABB SS823 is mainly used in:

• ABB System 800xA High Integrity safety systems
• AC 800M HI controller power architectures
• S880 High Integrity I/O systems
• Process industries requiring high availability:
  • Oil & gas
  • Chemical plants
  • Power generation
  • Water treatment
  • Critical manufacturing systems

6. System Integration Example

Typical redundant power arrangement:

24V DC Power Supply A ─┐
                       ├── SS823 Power Voting Unit ─── AC 800M HI / S880 I/O
24V DC Power Supply B ─┘

The SS823 ensures that a failure of one power supply does not interrupt the control system power feed.

7. Conclusion

The ABB 3BSE038226R1 SS823 is a critical power management component for ABB safety and high-availability automation systems. Its redundant power voting, voltage protection, diagnostics, and SIL3 suitability make it suitable for mission-critical industrial control applications where uninterrupted power availability is required.