Stellaris® Brushed DC Motor Control
Module with CAN (MDL-BDC24)
The Stellaris® Brushed DC Motor Control Module with
CAN (MDL-BDC24) improves on the highly successful
MDL-BDC design by providing variable speed control for
both 12 V and 24 V brushed DC motors at up to 40 A
continuous current, while adding a new RS232-based
serial control input that also functions as a serial-to-CAN
bridge. The MDL-BDC24 includes a rich set of sensor
interfaces, connectivity, and control options, including
analog and quadrature encoder interfaces, high
performance Controller Area Network (CAN) interfaces,
and an RS232 port. The module uses highly optimized
software and a powerful 32-bit Stellaris® microcontroller to
implement open-loop voltage control as well as
– Industry-standard R-C servo type (PWM) interface
– Controller Area Network (CAN) interface
– RS232 serial interface
Two options for closed-loop, speed, position, or current
control
– Controller Area Network (CAN) interface
– RS232 serial interface
CAN communication
– Full configurability of module options
– Real-time monitoring of current, voltage, speed, and
other parameters
– Load firmware over RS232/CAN
RS232 serial communication
closed-loop control of speed, position, or motor current.
The H-bridge on the MDL-BDC24 is run at high-frequency
through the MCU's integrated PWM interface and enables
DC motors to run smoothly and quietly over a wide speed
range.
– Bridges an RS232-enabled device to the CAN
– Directly interfaces to a PC serial port or National
Instruments cRIO
Limit switch inputs for forward and reverse directions
Firmware features
– Full configurability of closed-loop module parameters
– Real-time monitoring of sensor data including motor
current, encoder position or speed, and limit switch
state
The MDL-BDC24 is powered by the ARM®
Cortex™-M3-based LM3S2616 microcontroller that
provides efficient and deterministic performance while
integrating CAN, UART, and advanced motion control
capabilities. TheMDL-BDC24 design also incorporates
several high-quality analog components from Texas
Instruments, including the SN65HVD1050 CAN
Transceiver, MAX3221 RS232 Line Driver/Receiver,
TPS54040 Swift DC/DC Converter, TPS73633 Voltage
Regulator, and INA193 Current Shunt Monitor. The
MDL-BDC24 is positioned into a wide variety of consumer
and industrial applications, including factory automation
devices and systems, mobile robots, household
appliances, pumping and ventilation systems, and electric
wheelchairs and mobility devices.
Status LED indicates run, direction, and fault conditions
Motor brake/coast selector
Quadrature encoder input (QEI) and analog input
Color-coded screw terminals for all power wiring
Easy to customize using tools supporting the
MDL-BDC24 from Keil, IAR, Code Sourcery, or Code
Red (using a Stellaris evaluation kit or preferred
ARM® Cortex™-M3 debugger)
Features
12AWGWire with #6 ring
or spade terminals
For power wiring use
Maintain 0.5" clearance
Motor output is not protected
around all vents
against short-circuits.
From Power
Distribution
Module
Motor
Out
(–) In
(–) Motor
(+) Motor
(+) In
Mounting holes
3.50" centers
User Switch
Maintain0.5" clearance
around all vents
CAN Port
Ordering Information
Status LED
RS232/CAN Port
Limit switch inputs
Product
Description
Number
Use hooks to prevent
wires shaking loose
Encoder Input
Analog input(0-3V)
Motor coast/brake jumper
Stellaris® Brushed DC Motor Control Module
MDL-BDC24
with CAN (MDL-BDC24) for Single-Unit
Packaging
The MDL-BDC24 ships as a ready-to-run, yet
customizable, module with the following features:
Stellaris® Brushed DC Motor Control Module
with CAN (MDL-BDC24) for Volume Packaging
Quiet control of brushed DC motors
– 15 kHz Hbridge frequency
MDL-BDC24-B
Three options for open-loop voltage control
Texas Instruments • 108 Wild Basin, Suite 350 • Austin, TX 78746
Main: +1-512-279-8800 • Fax: +1-512-279-8879 • http://www.ti.com
Copyright © 2009–2011 Texas Instruments, Inc. All rights reserved. Stellaris and
StellarisWare are registered trademarks of Texas Instruments. ARM and Thumb are
registered trademarks, and Cortex is a trademark of ARM Limited. Other names and
brands may be claimed as the property of others.
PB-MDLBDC24-01
January 3, 2011
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