1. Product Model

2. Brand

3. Product Category

4. Alias

• Official: FCCC – Field Control Board, Revision 2

• Other: Field Regulator Board, Motor Field Excitation Control Card, Cardpack Field Board

5. Basic Information

• Manufacturer: Reliance Electric (USA)

• Form factor: 19” rack‑mount plug‑in card (Cardpack chassis)

• Status: Obsolete / Discontinued (used, refurbished, surplus only)

• Dimensions: approx. 4” × 5” (102 mm × 127 mm)

• Faceplate: Marked FCCC; terminals 181, 182, F1, F2; two mounting screws; Rev 2 revision label

6. Function & Positioning

• Core Function: Regulates DC motor field excitation current (Rev 2 upgrade)

  • Precision closed‑loop control of field winding voltage/current

  • Field weakening for high‑speed overspeed (constant horsepower)

  • Enhanced noise immunity & stability vs. earlier revisions

  • Interfaces with armature drive for coordinated speed regulation

• Positioning: Critical excitation control module for Reliance MaxPak / PRL DC drives; ensures stable motor field and accurate speed regulation

7. Core Performance Parameters

• Input: Drive control signals, power supply

• Output: Regulated DC field current to motor field winding

• Control: Closed‑loop current regulation with trim adjustments

• Operating Temperature: 0°C to +55°C

• Storage Temperature: -40°C to +85°C

• Protection: Overcurrent, loss of field, overheat detection

• Revision Difference: Rev 2 includes improved surge protection and component upgrades

8. General Matching Accessories

• Drive main control board

• Field power supply

• Shielded field wiring

• Rack mounting hardware

• Calibration screwdriver

9. Applicable Equipment & Industry

• Applicable Equipment:

  • Reliance MaxPak / MaxPak Plus DC drives

  • PRL and Cardpack legacy systems

  • Large industrial DC motors (field‑wound)

• Applicable Fields:

  • Steel rolling mills

  • Paper & converting machines

  • Mining conveyors

  • Heavy‑duty CNC & machine tools