1. General Information

• Part Number: 0-52837

• Manufacturer: Reliance Electric (Rockwell Automation / Baldor-Reliance)

• Product Type: Drive Logic Control PCB Card (Signal Regulation & Protection Board)

• Application: FlexPak 3000 / CardPak Series DC Industrial Drives

• Status: Obsolete Discontinued; Refurbished & Used Parts Available

• Mounting: Standard Plug-in Backplane Edge Connector Card

2. Electrical Specifications

• Logic Supply: 24 VDC Internal Drive Control Power

• Signal Type: Analog Speed Feedback, Current Loop Signal, Fault Logic I/O

• Isolation: Optocoupler Isolated Industrial Anti-Interference Circuit

• Control Accuracy: High-Precision DC Speed & Torque Closed-Loop Regulation

• Protection Circuits: Overcurrent, Overvoltage, Speed Abnormality & Fault Interlock

• On-board Components: Precision Transformers, Filter Capacitors, Logic ICs, Regulating Diodes & Resistors

3. Main Functions

1. Closed-loop speed and torque signal conditioning for DC drive system

2. Drive internal logic interlock and fault judgment output

3. Motor operating status sampling and parameter calibration

4. Matching communication between main control board and power unit

5. System abnormal protection and fault reset logic control

4. Mechanical Dimensions

• Form Factor: Standard CardPak Plug-in PCB

• Size: Approx. 190 × 120 × 30 mm

• Connection: Rear Gold Finger Edge Backplane Connector

• Faceplate: Fixed by 3 Mounting Screws, Status Indicator LEDs

• Weight: Approx. 0.45 kg

• Surface: Conformal Coating, Dust & Corrosion Resistant

5. Environmental Ratings

• Operating Temperature: 0°C ~ +55°C

• Storage Temperature: -20°C ~ +70°C

• Humidity: 10% ~ 90% RH, Non-condensing

• Vibration: Industrial Grade 10–100 Hz, 0.15 mm Amplitude

6. Installation & Replacement

1. Cut off all main power and control power of the drive completely

2. Insert the board along the slot and press the edge connector firmly into place

3. Fix the front panel screws tightly

4. No additional wiring modification, direct pin-compatible replacement

5. Power on and calibrate speed, current parameters to run normally

7. Fault Troubleshooting

• No control response: Check edge connector contact & 24V logic power supply

• Unstable speed: Inspect feedback signal circuit and board potentiometer parameters

• Frequent fault alarm: Detect overcurrent threshold and on-board discrete components

• No fault reset: Check reset circuit and logic chip working status

8. Compatibility

• Matching Drives: FlexPak 3000, FlexPak Plus, CardPak DC Drive Chassis

• Interchangeable: Direct replacement with same-series 0-528xx control cards

• Wiring Pinout: Fully consistent, no program or parameter modification required