1. General Information

• Part Number: 0‑52819 (052819)

• Manufacturer: Reliance Electric (ABB Baldor‑Reliance)

• Type: PRMA (Programmable Regenerative Motor Accessory) Board

• Category: DC drive plug‑in control card (dual‑board assembly: PC1 + PC2)

• Status: Obsolete / legacy; NOS or refurbished only

2. Description

• Rack‑mount plug‑in PCB for Reliance FlexPak Plus / MaxPak Plus / V‑Series DC drives

• Dual‑board stack: PC1 (logic/switch) + PC2 (relay/driver)

• Conformal coated, gold‑plated edge connector

• Front panel: 10‑position terminal block for external I/O

3. Key Functions

• Regenerative control logic: Enables 4‑quadrant (forward/reverse, motoring/regenerating) operation

• Motor parameter programming: Switch‑selectable settings for armature/field ratings

• I/O interface: Dry contact relays for drive enable, fault, speed reference

• Sequencing & interlocking: Coordinates with firing/protection boards (e.g., 0‑52808 series)

4. Electrical

• Power Supply: 115/230 VAC (drive internal), 24 VDC logic

• Relay Outputs: 3 × SPDT relays (24 VDC coil, 5 A @ 120/240 VAC)

• Switch Banks: 3 × 8‑position DIP switches (PC1) for configuration

5. Environmental

• Operating Temp: 0 °C to +55 °C

• Storage Temp: −20 °C to +70 °C

• Humidity: 5%–95% non‑condensing

6. Mechanical

• Form Factor: Standard 19” rack plug‑in card

• Assembly: Two stacked PCBs (PC1 + PC2)

• Weight: ~0.68 kg (1.5 lb)

• Connector: Gold‑plated edge connector (backplane)

7. Compatibility

• Reliance FlexPak Plus DC drives

• Reliance MaxPak Plus / V‑Series DC drives

• Works with: 0‑52808 (OLVC), 0‑52861 (firing board), 0‑52841 (SRDA)