1. Product Model

2. Brand

3. Category

4. Alias

• Official: FCCC / FCCD – Field Control Board

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

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• Status: Obsolete / Discontinued (used, refurbished, surplus only)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 FCCD; terminals 181, 182, F1, F2; two mounting screws

6. Function & Positioning

• Core Function: Regulates DC motor field excitation current

  • Controls field winding voltage/current for constant horsepower operation

  • Provides field weakening for high‑speed overspeed

  • Interfaces with armature drive for coordinated speed control

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

7. Core Performance Parameters

• 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

8. General Matching Accessories

• Drive main control board

• Field power supply

• Shielded field wiring

• Rack mounting hardware

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