General Information

• Part Number: 0-48673-1 (also 0486731)

• Manufacturer: Reliance Electric (Rockwell Automation)

• Product Type: 104/105 Regulator Board (drive regulator PCB)

• Alternate P/N: 0-48673, 800792-49A

• NSN: 5920-01-245-8474

• Application: For Reliance Electric 104/105 series DC drives, motor speed & current regulation

• Status: Obsolete / legacy, available as new surplus or repaired

Electrical Specifications

• Control Voltage: 115/230 VAC (drive supply)

• Logic Supply: 24 VDC ±10%

• Function: Closed‑loop speed regulation, current limiting, field excitation control

• Signal Interfaces: Analog speed reference, tachometer feedback, current sense

• Protection: Overvoltage, overcurrent, short‑circuit, thermal shutdown

• Drive Compatibility: Reliance 104/105 DC drive systems

Mechanical Specifications

• Form Factor: Plug‑in industrial PCB (card‑type)

• Dimensions (W×H×D): ~220 mm × 120 mm × 30 mm

• Weight: ~1.49 lb (0.676 kg)

• Mounting: Slot‑mounted in drive rack, edge‑connector interface

• Construction: FR‑4 PCB with conformal coating, gold‑plated edge contacts

Environmental Ratings

• Operating Temp: 0 °C to +55 °C

• Storage Temp: −40 °C to +70 °C

• Humidity: 5%–95% RH, non‑condensing

• Vibration: 1 g (10–100 Hz), industrial grade

• Shock: 15 g peak, 11 ms duration

Key Features

• Precise speed/current regulation for DC motors

• Tachometer feedback for stable RPM control

• Built‑in current limit & overload protection

• Direct replacement for original 0-48673 series boards

• Compatible with Reliance 104/105 drive systems

• Repairable and supported by industrial repair vendors

Compatibility

• Replaces: 0-48673 (non‑suffix version)

• Fits: Reliance Electric 104 & 105 series DC motor drives

• Interchangeable: With 800792-49A assembly