0-56935-100 | Reliance Electric Current Feedback Board

The 0-56935-100 is a current feedback board designed for use in the GV3000 and GV3000/SE AC drive series, originally manufactured by Reliance Electric. This board plays a critical role in the operation of motor drives by providing accurate current feedback, which ensures precise control and stability within the system. Although the 0-56935-100 was originally produced by Reliance Electric, it was also distributed by ABB and Baldor Reliance, though it has since been discontinued by all these manufacturers. This product may now be difficult to source, making it a legacy component in industrial motor control systems.

Specifically engineered for drives rated between 7.5 HP and 10 HP, the 0-56935-100 is designed to support medium-range motor control systems that require precise current monitoring. The current feedback board is positioned behind the regulator card in the GV3000 series drives, with its lower CON 2 connection partially visible behind the regulator. It works in conjunction with the regulator card, which sends PWM gate signals to the feedback board. These signals are then transmitted to gate drivers, where they are isolated on the gate driver board, contributing to the accurate and reliable operation of the drive system.

The 0-56935-100 features three primary connectors for integrating with the drive system: CON 1, CON 2, and CON 3. CON 1 is located in the top right corner of the board, CON 2 is positioned in the bottom left, and CON 3 is in the top left corner. These connectors play an essential role in interfacing the current feedback board with the other components of the drive system, allowing for seamless data transmission and control signal processing. The presence of multiple connection points ensures that the board can effectively communicate with other components in the drive to maintain the proper functioning of the motor control system.

The board’s components include five resistors, a cylinder aluminum electrolytic capacitor, two large blue capacitors, a ceramic capacitor, an inductor coil, a diode, and a Zener diode. These components work together to filter, regulate, and stabilize the current feedback signals, ensuring accurate signal transmission from the motor to the drive control system. The board also includes two jumpers labeled "7.5 HP" and "10 HP," allowing it to be configured for the specific power rating of the drive in use. This flexibility makes it suitable for a range of motor control applications where precision and adaptability are required.

Measuring 6.5 inches in length and 2.5 inches in width, the 0-56935-100 is compact, allowing it to fit easily within the limited space inside the GV3000 drive cabinet. Weighing just 0.3 lbs, it is lightweight and can be easily installed or replaced without significant effort. The compact dimensions and light weight make it suitable for tight installation spaces often found in industrial drive systems.

The 0-56935-100 current feedback board is essential for ensuring stable motor operation in medium-power AC drives. Its function is to continuously monitor the current within the system, allowing the drive to make real-time adjustments to the motor's operation based on the feedback received. By doing so, the board helps optimize the performance of the motor, increasing efficiency and reducing the risk of damage or downtime due to current instability or overload.

Although the 0-56935-100 has been discontinued by its original manufacturers, it remains a vital component in older GV3000 and GV3000/SE drive systems that are still in operation. Maintenance teams relying on these legacy drives may still seek out this board for replacement purposes to ensure the continued operation of their systems. For those using the GV3000 or GV3000/SE drives in critical applications, maintaining functional current feedback boards like the 0-56935-100 is essential for minimizing operational disruptions.

In conclusion, the 0-56935-100 current feedback board is a specialized component designed for use with 7.5-10 HP GV3000 and GV3000/SE drives. Its key functions include accurate current feedback and integration with the drive's control system, ensuring optimal motor performance. Despite being discontinued, it remains a critical part for those maintaining legacy motor control systems that require precise current regulation and stability.