MMP SA-2550A
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Midwest Motion Products
DESIGN, MANUFACTURING & DISTRIBUTION - MOTION CONTROL EQUIPMENT
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Short Circuit
The drive will fault if a short circuit is detected on the output. This can occur if any of the motor phases are shorted to power
ground, AC ground, or shorted together. Use a DMM to measure the resistance between two points of interest. A 0 ohm
resistance indicates a short circuit.
Measure the resistance between each motor phase.
Measure the resistance between each motor phase and both the power ground and AC ground.
Make sure the motor phases are not shorting to AC ground through the motor housing or shielding on the motor power cable.
Over-current
An over-current fault will occur if commanding a current greater than the peak rating of the drive. In most cases though, the drive
will limit the current to prevent an over-current fault. PWM input and Sinusoidal input drives will alternate between an enabled and
disabled state to limit current when outputting current greater than the continuous rating of the drive. The LED will alternate
between red and green.
Power-on Reset
All amplifiers will have a brief flicker of a red LED during power up. This is the power-on reset that is built into the amplifier that
occurs on power up.
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