ABB SD802F 3BDH000002R1 Redundant Power Supply Module

Product Overview

The SD802F (3BDH000002R1) is a high-reliability power supply module specifically engineered for the ABB Freelance distributed control system (DCS). Designed to deliver a stable 24 VDC output, this unit is built with integrated redundancy capabilities to ensure maximum system uptime. In the event of a primary power source fluctuation or failure, the SD 802F maintains consistent electrical delivery to critical controller and I/O components, making it an essential building block for fault-tolerant industrial automation architectures.

Technical Specifications

• Brand: ABB

• Series: Freelance DCS

• Model Name: SD 802F

• Order Code: 3BDH000002R1

• Input Voltage: 24 VDC

• Input Frequency: 0 Hz (DC Input)

• Maximum Power Output: 31 W

• Equipment Classification: Class 3 (SELV/PELV)

• Redundancy Support: Yes (Parallel Redundant Configuration)

• Status Indicators: Integrated LED for operational monitoring

• Width: 11.2 cm (4.41 in)

• Height: 14.5 cm (5.71 in)

• Depth: 14.0 cm (5.51 in)

• Net Weight: 1.0 kg (2.2 lbs)

• Mounting: Standard Rack or DIN Rail assembly

Engineering Insights and Operational Logic

The SD 802F (3BDH000002R1) is designed for high-density control cabinets where thermal management and space efficiency are key. Operating as a Class 3 equipment type, it provides the low-voltage safety required for sensitive PLC and DCS electronics. Its primary engineering advantage is its native redundancy; when two SD 802F units are paired, they share the load effectively. Should one module fail, the transition to the secondary unit is instantaneous and bumpless, preventing CPU reboots or I/O signal loss. The ruggedized 1 kg chassis acts as a heat sink, allowing the unit to maintain its 31 W peak output without requiring active fan cooling in standard industrial temperatures.