1. Product Model

2. Brand

3. Product Category

4. Alias

• Official：Power Supply Board

• Common：Drive Control Power Card, System Auxiliary Power PCB, Logic Power Module, Regulator Power Board

5. Basic Information

• Manufacturer：Reliance Electric, USA

• Structure：19” rack‑mount plug‑in card, edge connector (long‑edge backplane)

• Status：Obsolete / Discontinued（legacy maintenance spare part）

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

• Features：Integrated transformer, rectifier, filter caps, voltage regulation, fuses, LED indicators

• Revision Note：‑A denotes updated components, tighter regulation, improved noise immunity vs. base 0-51903

6. Function & Positioning

• Core Function：Generates and stabilizes all low‑voltage control power for Reliance MaxPak/PRL/Cardpack DC drives; converts 115/230 VAC to ±15 VDC (logic/feedback) and +24 VDC (relays/indicators); provides clean, isolated power with overvoltage/overcurrent/short‑circuit protection; ensures stable operation of regulator, feedback, and logic boards.

• Positioning：Central auxiliary power source for the drive control system; pairs with 0-51901‑A (armature regulator)、0-51902‑5A (speed feedback)、0-51893‑7 (field control) to form a complete high‑performance DC speed control system.

7. Core Performance Parameters

• Input：115/230 VAC, 50/60 Hz, fused

• Output：

  • ±15 VDC (±0.5% regulation, <50 mVpp ripple)

  • +24 VDC (±1% regulation, short‑circuit protected)

• Adjustments：Trim pots for voltage calibration

• Operating Temp：0°C ~ +55°C

• Storage Temp：-40°C ~ +85°C

• Protections：Input fuses, overvoltage clamp, current limiting, short‑circuit shutdown, surge suppression

8. General Matching Accessories

• Armature regulator：0-51901‑A

• Speed feedback board：0-51902‑5A

• Field controller：0-51893‑7

• Main logic board, gate trigger board, shielded power/signal cables, rack hardware, test tools

9. Applicable Equipment & Industry

• Equipment：Reliance MaxPak, PRL, Cardpack series industrial DC drives, heavy‑duty spindle drives, coil winders

• Industries：Metallurgical rolling mills, papermaking machines, mining conveyors, heavy machine tools, textile lines, printing presses, industrial constant‑torque speed regulation systems