SS822 ABB Voting Module Dual 24V Input 20A Output Redundant Power Supply

Product Overview

• SS822 Power Voting Unit (3BSC610042R1)
  • ABB type designation: SS822
  • Product type: Voting unit for redundant power
  • Ensures continuous operation if one power supply fails
• Key function
  • Takes dual 24V DC inputs (20A each)
  • Provides single 24V DC output (20A)
  • Each input is supervised for faults
• Perfect match
  • Designed for use with SD821/SD822/SD823 power supplies

Model Breakdown

• SS822 naming explained
  • SS – Safety & Supervision series
  • 8 – Voting / Redundancy module
  • 22 – 20A capacity version
• Replacement information
  • Exchange No. 7650 055-772

Technical Specifications

• Input specifications
  • Input voltage: 24V DC
  • Number of inputs: 2 (dual)
  • Max input current per channel: 10A
  • Each input independently supervised
• Output specifications
  • Number of outputs: 1
  • Output voltage: 24V DC
  • Max output current: 20A
• Physical specifications
  • Width: 50 mm (narrow footprint)
  • Weight: 0.5 kg
  • Gross volume: 1.01 dm³

Mounting Information

• Mounting type
  • DIN rail mount – standard EN 50022
  • Snaps onto 35mm rail
• Space saving
  • Only 50mm wide – fits tight panels
• Wiring
  • Use copper wires only
  • Terminal capacity: up to 6 mm²

How It Works

• Voting logic
  • Both power supplies feed into SS822
  • Unit votes for healthy supply
  • Output comes from active input
• Supervision
  • Each input monitored for under/over voltage
  • LED indicators show input status
  • Fault signal available for diagnostics
• Failure handling
  • If one input fails, other takes over seamlessly
  • No interruption to connected load

Compatible Power Supplies

• ABB SD series
  • SD821 – Basic 24V power supply
  • SD822 – Enhanced version
  • SD823 – High reliability model
• Use two identical units for true redundancy

Applications

• Critical control systems
  • Safety instrumented systems (SIS)
  • Emergency shutdown (ESD) panels
• Industrial automation
  • PLC and DCS power distribution
  • Process control cabinets
• Marine and offshore
  • Redundant power for navigation
  • Dynamic positioning systems

Professional FAQ

• Q: Can I use SS822 with any 24V power supply?A: It is optimized for ABB SD821/SD822/SD823 series. For other brands, check if they have similar characteristics and supervision outputs.
• Q: What happens if both inputs fail?A: Output drops to zero. The unit monitors each input and can trigger an alarm before both fail.
• Q: Does it provide isolation between inputs?A: No. Inputs share common ground. For full isolation, use external isolating devices.
• Q: How do I know which input is active?A: LED indicators on front panel show status. Green for active, yellow for standby, red for fault.
• Q: Can I parallel two SS822 units for higher current?A: Not recommended. Each SS822 handles up to 20A. For higher loads, use larger power supplies directly.

Selection & Purchase Guide

• Current requirement: Your load must be ≤20A. If higher, use separate non-redundant feeds.
• Power supplies: Order two identical SD822 units for best matching.
• Space: Only 50mm wide – fits easily in crowded panels.
• Supervision: Each input monitored – connects to your PLC for remote alarm.
• Warranty: 12 months from invoice. Fast shipping via FedEx, UPS, DHL.

Shipping & Warranty

• Express shipping: FedEx, UPS, DHL – fully tracked and insured
• 12 months warranty: Covers defects in materials and workmanship
• Packaging: Anti-static protection, double box

Contact Us

• Email: sales@powergearx.com – 24h response
• WhatsApp: +86 180 3005 825 – technical support

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