ABB SS823-3BSE038226R1 Power Voting Unit

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Product Overview

The ABB SS823 (part number 3BSE038226R1) is a high-reliability Power Voting Unit designed for redundant power supply systems. It combines two 24 V DC inputs into a stable 24 V output, while providing fault detection and status indication. Commonly used in high-availability and high-integrity control systems, such as ABB AC 800M.

Technical Specifications

• Model / Part Number: SS823 / 3BSE038226R1

• Type: Power Voting Unit + Over-voltage Protection

• Input Voltage: 24 V DC

• Output Voltage: 24 V DC

• Maximum Output Current: 20 A

• Rated Power: ~500 W

• Protection Features: Input over-voltage, output over-current and over-voltage protection, fault monitoring

• Redundancy Support: Dual input voting mechanism ensures continuous power supply

• Status Indication: Front-panel LED for output status; OK signal contact for fault monitoring

• Mounting: DIN rail

• Dimensions: H 132 mm × W 116 mm × D 145 mm

• Weight: ~0.87 kg

• Safety Certification: SIL 3 (IEC 61508), G3 grounding, Over-voltage Category III, suitable for SELV / PELV systems

Advantages & Features

1. High Reliability Redundancy: Dual input voting reduces the risk of single-point failures.

2. Robust Protection: Input over-voltage, output over-current and over-voltage protection ensure system safety.

3. Visual and Electrical Monitoring: LED shows output status; OK contact can be used for alarms or system monitoring.

4. Compact Design: DIN rail mounting saves control cabinet space and facilitates maintenance.

5. High Safety Standard: Compliant with SIL3 and G3 grounding for high-integrity systems.

6. Strong Compatibility: Suitable for ABB AC 800M and S880 high-integrity I/O systems, easy integration.

Application Areas

• ABB 800xA control systems and AC 800M DCS systems

• High-integrity safety systems, including petrochemical, power plants, and industrial automation

• Redundant power architectures to ensure continuous supply to critical I/O modules

• Industrial process control and automation systems

Precautions

1. Ensure stable 24 V DC input; both inputs must be correctly connected for redundancy.

2. Provide adequate ventilation around the unit to prevent overheating.

3. Proper grounding is required to meet safety standards (G3 compliance).

4. Use appropriately sized wiring for the high output current.

5. Connect OK contact to monitoring systems for fault detection and alarms.

6. Keep a spare unit in critical systems to minimize downtime.

The structure and details of the product：

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