1. General Information

• Part Number: 51446

• Manufacturer: Reliance Electric / Rockwell Automation

• Product Name: Speed Feedback & Control Logic Board

• Application: Compatible with Reliance FlexPak Series DC Drives

• Product Status: Obsolete, only refurbished and tested used products available

• Installation Style: Plug-in card type

2. Electrical Specifications

• Operating Power: Drive internal control power supply

• Feedback Signal Input: Tachometer generator speed signal

• Command Signal Input: 0-10VDC analog speed reference signal

• Logic Signal Level: Standard industrial control level

• Built-in Protection: Over current, surge and signal overload protection

• Signal Isolation: Internal optocoupler isolation design

• Anti-EMI: Built-in filter circuit for industrial harsh environment

3. Core Functions

1. Process motor tachometer feedback signal to realize closed loop speed regulation

2. Convert external speed setting signal into internal drive control signal

3. Match main control board to complete acceleration and deceleration control

4. Collect drive running state and output fault detection signal

5. Realize signal matching and level conversion between external system and drive

4. Mechanical Characteristics

• Structure: Standard industrial plug-in PCB board

• Connection Mode: Gold finger edge connector

• Installation Position: Inner card slot of DC drive cabinet

• Feature: Compact structure, easy installation and replacement

5. Environmental Ratings

• Operating Temperature: 0°C ~ +55°C

• Storage Temperature: -20°C ~ +70°C

• Working Humidity: 10% ~ 90% RH, non-condensing

• Vibration Resistance: Meet industrial standard vibration test requirement

6. Installation Guide

1. Cut off all power supply of the drive completely

2. Open drive cabinet cover and find corresponding card slot

3. Align 51446 board and insert it firmly into the slot

4. Check connection tightness without loose contact

5. Restore cabinet cover, switch on power and perform function debugging

7. Troubleshooting

1. Motor speed fluctuation: Inspect speed feedback circuit on the board

2. Speed regulation failure: Check external given signal and board circuit

3. Drive frequent fault alarm: Detect internal short circuit or component damage

4. No speed feedback: Verify signal input wiring and board channel circuit

8. Replacement Note