Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Harowe 21BRX700-D42AA |
| Manufacturer | Harowe Servo Controls (Moog Group) |
| Product Type | DC Motor Controller / PWM Drive Board |
| Input Voltage | 12–40 VDC (typical 24V or 36V) |
| Continuous Output Current | 7A (under specified cooling) |
| Peak Output Current | >7A (duration dependent on thermal conditions) |
| Control Mode | PWM with direction control |
| PWM Frequency | Configurable (common: 1kHz, 5kHz, 10kHz) |
| Command Signal Input | 0-5V analog or PWM speed/direction signal |
| Feedback Interface | Tachometer or encoder (closed-loop speed control) |
| Protection Features | Overcurrent, over-temperature, undervoltage lockout |
| Operating Temperature | 0°C to +70°C (industrial grade) |
| Mounting Type | Board-level with standard connectors |
Main Features and Advantages
Closed-Loop Speed Regulation: The Harowe 21BRX700-D42AA supports feedback from tachometers or encoders, enabling velocity control that far exceeds open-loop performance. This makes the controller suitable for applications where speed stability directly impacts product quality or process consistency, such as fluid delivery systems where tubing resistance varies over time .
Configurable PWM Frequency: Jumper-selectable PWM frequencies allow engineers to match the Harowe 21BRX700-D42AA to specific motor inductance characteristics, minimizing acoustic noise, electrical resonance, and thermal stress. This flexibility distinguishes it from fixed-frequency drives and enables optimization across diverse motor types without hardware changes .
Integrated Multi-Layer Protection: The Harowe 21BRX700-D42AA incorporates overcurrent, over-temperature, and undervoltage lockout protections directly on the board. Its active desaturation detection and instantaneous overcurrent response shut down output within microseconds during motor stall or short-circuit events, safeguarding both the controller’s MOSFETs and the connected motor windings from catastrophic damage .
Legacy System Compatibility: Designed for the era of analog control architectures, the Harowe 21BRX700-D42AA interfaces directly with older PLC analog output cards (0-10V or ±10V) while offering modern serial diagnostics via RS-232/RS-485. This enables existing systems to be maintained or upgraded without rewiring entire control cabinets, making the Harowe 21BRX700-D42AA an ideal drop-in replacement for failed units .
Application Field
The Harowe 21BRX700-D42AA serves critical roles in industries where precision motor control and system reliability are non-negotiable. In medical device manufacturing, the controller drives roller pump motors on infusion pump production lines, receiving analog commands from system PLCs and maintaining constant torque to ensure precise fluid delivery even as tubing resistance fluctuates . Semiconductor fabrication relies on the Harowe 21BRX700-D42AA for wafer handling robot applications, where its closed-loop feedback enables buttery-smooth motion at low speeds—eliminating jitter that could cause micro-damage to wafers and reduce yield .
Aerospace test facilities employ the Harowe 21BRX700-D42AA in flight control surface actuator rigs, configuring it for torque mode operation via ±10V input. Its high-speed current regulation maintains constant force on control surfaces during fatigue testing, providing accurate data for actuator design validation . Beyond these high-precision niches, the Harowe 21BRX700-D42AA supports legacy automation equipment across manufacturing, logistics, and process industries—serving as the “power amplifier” between weak command signals and the strong PWM outputs required to move machinery .
