DMC 60™ Reference Manual
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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5
Connecting the PWM Input Signal
The DMC 60 continually measures the positive pulse width of the PWM Input Signal applied to the PWM Cable and
maps it to an output voltage, or duty cycle. By default, a positive pulse width of 1.0 milliseconds corresponds to
100% duty cycle in the reverse direction (current flow from M- to M+), a positive pulse width of 2.0 milliseconds
corresponds to 100% duty cycle in the forward direction (current flow from M+ to M-), and a positive pulse width
of 1.5 milliseconds (+/- 4%) corresponds to neutral. When a neutral pulse width is detected the present Brake /
Coast setting is applied to the output. The DMC 60 expects the PWM Input Signal to have an input period between
2.9 and 100 milliseconds. This allows the update rate to be as high as 344 Hz or as low as 10 Hz.
The DMC 60's PWM Input Cable features a 0.1" pitch 3-pin female header that is compatible with most RC / PWM
Servo Controllers, allowing the DMC60 to be readily wired directly to those devices. The table below describes the
pinout for the PWM Input Cable.
Wire Color
Signal Description
White
PWM Signal
Black
PWM Ground
6
Motor Controller LEDs
The DMC 60 contains four RGB (Red, Green, and Blue) LEDs and one Brake / CAL LED. The four RGB LEDs are
located in the corners and are used to indicate status during normal operation, as well as when a fault occurs. The
Brake / CAL LED is located in the center of the triangle, which is located at the center of the housing, and is used to
indicate the current Brake/Coast setting. When the center LED is off the device is operating in coast mode. When
the center LED is illuminated the device is operating in brake mode. The Brake/Coast mode can be toggled by
pressing down on the center of the triangle and then releasing the button.
At power-on the RGB LEDs will display a progressive blue color, which continually gets brighter. This lasts for
approximately five seconds. During this time the motor controller will not respond to an input signal, nor will the
output drivers be enabled. After the initial power-on has completed the device will begin normal operation and
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