1. Brand & Model

• Brand: Reliance Electric (now ABB/Baldor)

• Model: 0-52823

• Alias: DFSA Digital Firing Board, Drive Control Card, Sequence Trigger Board

2. Category

• Category: Industrial Automation Control Board

• Subcategory: Digital Firing/Sequence Control Card (Drive Boards Series)

3. Basic Information

• Manufacturer: Reliance Electric, USA

• Status: Obsolete (discontinued), only refurbished/used units available

• Structure: Single PCB with narrow faceplate, top/bottom set screws, edge connector for backplane

• Marking: Grid pattern (letter/number axis) for component reference

4. Function & Positioning

• Core Function:

  • Precision digital firing & pulse sequencing for AC/DC drives

  • Voltage regulation & protection for power stages

  • Serial data processing & drive system status monitoring

• Positioning: Critical control component for Reliance high-power drive systems, used in heavy industrial applications

5. Core Specifications

• Power: 115 VAC main; ± auxiliary power

• Interface: Serial data I/O; edge connector (conductive tabs) for backplane connection

• Components: Polyester vinyl capacitor, ceramic disk capacitors, industry-standard ICs (marked for easy replacement)

• Environment: Industrial-grade, ruggedized for harsh conditions

• Mounting: Standard industrial rack (2 screws on faceplate)

6. Compatible Accessories

• Rack: Reliance standard drive racks (e.g., GV3000 series)

• Backplane: Matching conductive-tab backplane connector

• Cabling: Shielded twisted pair (serial data), 115 VAC power cable

• Replacement: Compatible ABB/Baldor equivalent control cards (check firmware revision)

7. Applications

• Industrial Drives: Reliance DC speed regulators, AC inverters (GV3000, SP500 series)

• Metallurgy: Rolling mills, table drives

• Material Handling: Conveyors, cranes

• Process Industry: Paper mills, mining, heavy machinery