Product Overview
The Harowe 21BRX700-D42AA is a compact, high-performance motor controller designed for precise speed, torque, and position control of DC motors in demanding industrial automation applications. Manufactured by Harowe Servo Controls—now part of the Moog group—the 21BRX700-D42AA belongs to the BRX700 series of motion control modules and serves as a critical interface between PLCs or motion control cards and DC motors in a wide range of legacy and specialized equipment .
At its core, the Harowe 21BRX700-D42AA functions as a power amplifier, converting low-voltage command signals into high-power PWM (Pulse Width Modulation) outputs to drive motors with precision and efficiency . Its flexible design supports both brushed and brushless DC motors, making it a versatile solution for equipment manufacturers and maintenance engineers alike. The 21BRX700-D42AA integrates power stage electronics, control logic, and comprehensive protection circuits into a single compact module, simplifying system integration and reducing cabinet space requirements .
Positioned as a reliable workhorse in the motion control ecosystem, the Harowe 21BRX700-D42AA is particularly valued for its robust closed-loop feedback capabilities, supporting tachometer, encoder, and Hall sensor inputs for precise speed and position regulation . Its configurable PWM frequency and analog control interfaces enable seamless integration with older analog control systems while also providing digital diagnostics for modern maintenance workflows . The 21BRX700-D42AA is a trusted solution for extending the operational life of critical automation assets where system redesign is cost-prohibitive.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | |
| Manufacturer | Harowe Servo Controls (now Moog) |
| Product Type | DC Motor Controller / PWM Drive Module |
| Input Voltage | 12 – 40 VDC (typical 24V or 36V systems) |
| Continuous Output Current | 7A (under specified cooling conditions) |
| Peak Output Current | Above 7A (duration dependent on thermal conditions) |
| Motor Compatibility | DC Brushed and Brushless (BLDC) motors |
| Control Signal Inputs | ±10V or 0-5V analog voltage for speed/torque command |
| PWM Frequency | Configurable via jumpers (e.g., 1kHz, 5kHz, 10kHz) |
| Feedback Interfaces | Tachometer, Encoder, Hall Sensors |
| Communication | RS-232 / RS-485 for configuration and monitoring |
| Protection Features | Overcurrent, Overtemperature, Undervoltage Lockout, Short-Circuit |
| Operating Temperature | 0°C to +70°C (industrial grade) |
| Control Modes | Speed Control, Torque Control |
| Mounting | Chassis / Panel Mount |
| Weight | Approx. 0.5 – 1.0 kg |