ABB SS822
ABB SS822 - Image 2

ABB SS822

Product Overview:
The ABB SS822 is a dedicated voting unit designed for redundant power supply configurations. It acts as a control and supervision module that separates redundant Power Supply Units (PSUs), monitors their output voltages, and generates supervision signals for the computer system.

Request Quote
Category: SKU: ABB SS822

Description

ABB SS822

Technical Specifications:

  • Low Voltage Trip Level: 22 V (decreasing voltage).
  • Low Voltage Trip Hysteresis: 0.7 V.
  • High Voltage Trip Level: 30 V (rising voltage).
  • High Voltage Trip Hysteresis: 0.7 V.
  • Contact Rating (AC): Max 120 V and max 0.5 A.
  • Contact Rating (DC): Max 28 V and max 1 A; min 1 mA, recommended min 5 mA.
  • Rated Output Current: 20 A.
  • Rated Output Voltage: 24 V DC.
  • Rated Input Power: 500 W.
  • Mains/Input Voltage: 2 x 24 V DC.
  • Max Mains/Input Voltage: 35 V DC.
  • Heat Dissipation: 10 W.
  • Output Voltage Regulation: 0.5 V lower than input at max current.
  • Maximum Output Current: 35 A (Overload).
  • Protection Rating: IP20 according to EN60529 / IEC 529.
  • Dimensions: Width 50 mm, HxD = 125 x 110 mm.

Functional Features:

  • Redundancy Management: Seamlessly manages dual PSU outputs to ensure continuous power.
  • Voltage Supervision: Continuously monitors voltage levels against preset high and low trip thresholds.
  • Visual Indication: Front-panel green LEDs indicate correct output voltage delivery.
  • Contact Closure: Green LED illumination corresponds to a voltage-free contact closing the path to the “OK connector”.

Application Scenarios:

  • High-availability control systems requiring uninterrupted power.
  • Redundant power supply configurations in industrial automation.
  • Critical infrastructure and process control applications.

Material Composition & Structural Characteristics:

  • Enclosure: Compact industrial housing designed for DIN rail or panel mounting.
  • Indicators: Front-mounted green status LEDs for visual voltage confirmation.

Working Principle:
The SS822 receives inputs from two identical PSUs, isolates them, and continuously supervises the voltage. If the voltage falls outside the hysteresis band, it triggers the appropriate trip level and updates the supervision signals to the connected computer system.

Installation Requirements:

  • Connect the outputs of two identical PSUs to the designated input terminals.
  • Wire the supervision signals to the computer system for monitoring.
  • Ensure adequate ventilation to manage the 10 W heat dissipation.

Usage Precautions:

  • Do not exceed the maximum input voltage of 35 V DC.
  • Ensure the minimum load current meets the recommended 5 mA for reliable contact operation.

Related products