Back by Popular Demand: AC/DC, PWM, Serial Communication…80’s Rock Bands or ECM Communication Methods?

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1. True or False: BPM stands for "brushless permanent magnet."

2. Which of the ECM types is a "variable speed" motor?

3. Outdoor fan motors typically use __________________ ECMs.

4. True or False: You CANNOT configure the rotation direction of any aftermarket motor.

5. In 24v diagnostics of a constant-speed motor, which of the following readings would be unrealistic if the motor is being used as a 3-speed motor?

6. When performing PWM diagnostics on a constant-speed motor, which of the following readings is NOT a likely input voltage (VDC) of a motor that is in good working order?

7. When the constant-torque ECM was INTRODUCED, how many programmable speed taps did it have for 24v power?

8. Where do your meter leads need to be to read line voltage on a constant torque ECM?

9. When you have PWM communication on a constant torque ECM, which terminal is used?

10. Which communication method does an "18-speed motor" typically indicate?

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