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ManualsBrandsDevantech ManualsBrushed DC Motor ControllersDevantech MD49 24V 5A Dual H-Bridge Motor Driver

MD49 - Dual 24 Volt 5 Amp H Bridge Motor Drive

Overview

The MD49 is a robust serial dual motor driver, designed for use with our EMG49 motors. Main

features are:

1. Reads motors encoders and provides counts for determining distance traveled and direction of

rotation.

2. Drives two motors with independent or combined control.

3. Motor current is readable.

4. Only 24v is required to power the module.

5. Steering feature, motors can be commanded to turn by sent value.

6. Variable acceleration and power regulation also included

7. Protection against short circuit output, over current and incorrect voltage. Also included is an error

LED and error byte for diagnosis of faults.

Connections

Summary of content (6 pages)

PAGE 1
MD49 - Dual 24 Volt 5 Amp H Bridge Motor Drive Overview The MD49 is a robust serial dual motor driver, designed for use with our EMG49 motors. Main features are: 1. Reads motors encoders and provides counts for determining distance traveled and direction of rotation. 2. Drives two motors with independent or combined control. 3. Motor current is readable. 4. Only 24v is required to power the module. 5. Steering feature, motors can be commanded to turn by sent value. 6.
PAGE 2
Automatic Speed regulation By using feedback from the encoders the MD49 is able to dynamically increase power as required. If the required speed is not being achieved, the MD49 will increase power to the motors until it reaches the desired rate or the motors reach there maximum output. Speed regulation can be turned off with the use of the REGULATOR DISABLE command.. Automatic Motor Timeout The MD49 will automatically stop the motors if there is no I2C communications within 2 seconds.
PAGE 3
For example to read the battery voltage, send: 0x00 - sync byte 0x26 - READ VOLTS command and the MD49 would respond with 0x18 - returned byte (24 decimal) 24v Speed1 Depending on what mode you are in, this register can affect the speed of one motor or both motors. If you are in mode 0 or 1 it will set the speed and direction of motor 1. The larger the number written to this register, the more power is applied to the motor.
PAGE 4
Motor 1 and 2 current A guide reading of the average current through the motor is available. It reads approx ten times the number of Amps (25 at 2.5A). Software Revision number Responds with the revision number of the software in the modules PIC18F2321 controller - currently 1 at the time of writing. Acceleration Rate If you require a controlled acceleration period for the attached motors to reach there ultimate speed, the MD49 has the ability to provide this.
PAGE 5
3, Mode 3 is similar to Mode 2, except that the speed values are interpreted as signed values. Data is in the range of -128 (Full Reverse) 0 (Stop) 127 (Full Forward) GET VI This command instructs the MD49 to send the battery volts reading (25 = 25v), then the current being drawn by motor 1 (roughly 1 count per 100mA) and finally the current being drawn by motor 2.
PAGE 6
Board dimensions