Peacefair PZEM 025 DC Power Monitor
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- Опубликовано: 15 сен 2024
- A brief look at Peacefair PZEM-025 dc power monitor. It will go up to 300v dc so it works well for monitoring and adding up all the power that comes in on a direct PV solar system to water and space heater resistive heating elements.
Hi. I appreciate this video. I just purchased this unit to monitor the 4.25 hp, 130 VDC treadmill motor I have. But I’m still unclear on the wiring.
This unit requires a 12 VDC power source, right?
I have my positive and negative DC wires going to my motor. How do they connect to this device and how do they exit to get to the motor? The wiring diagram was confusing to me.
I assume my motor is the Load. Correct?
Oh, so the red DC wire goes directly to my motor. The black DC wire connects to the left side on the back of the device and then exits on the right side to continue to the motor.
My concern is that the little wires supplied with this unit, that connect to the side with the little plug won’t handle the 130 volts, 25 amps.
Can you help me understand?
Thanks,
Paul
The little wires are for power ( 5 to 12 v dc ) to LED back light. The other two wires don't carry any current, they are just to sense the voltage and those go to your positive and negative power source. Your load power wires will be larger gauge wires big enough to supply your load ( so at last 10 gauge in your case which will do 30 amps). You got it right - the motor will get positive direct and the negative from motor will go in and out of the PZEM-025 studs on back.
Let me know how it works out on your motor. I only have used mine for resistive loads, your motor will be an inductive load.
Thanks Larry. I was just confused about the wiring diagram. It has a pair of small connectors. One for DC power and the other looks like it hooks up to my motor. But the wires are way too small for that. So I’m still confused about the other pair of small wires.
I have my DC power supply for the display.
I have my main DC negative going in and out of the meter before it goes to the motor.
This leaves me with another pair of small wires that connect to the display with a little white pin connector.
What is that for and where do the wires connect? I’m still not getting it. I design optical systems for NASA. This electronics stuff is alien to me.
But when I saw your video, I thought “That’s a cool idea. I want one”.
Paul
@@paulmanhart4481 Your motor has a negative and positive wire to it. The negative wire goes through the meter via the big terminals on back of meter. Those negative and positive wires are bigger and supply the power to the motor . There are two small white connectors with positive and negative. The wire from one of the connectors is between 5 and 12v to power the meter and it's backlight. The other small white connector goes to positive and negative of your battery. It's purpose is to just give the meter the voltage reading. It gets the voltage directly from the battery so it doesn't how the voltage drop of the main power going to the motor through the bigger wires that supply the motor. I hope this makes sense . Those small wires going directly to the battery do not supply any current to the motor - they only are getting the voltage reading to the meter so that is why they can be very small wires.
But I don’t have a battery, just a motor. Are you saying that I can’t read the voltage that my motor is using? I was hoping for a display that showed both volts dc and amps.
See, this is why I have problems with electronics. I don’t understand them.
Any suggestions on how I can display both? Maybe I have the wrong meter. I don’t know what to search for.
Thanks for your help Larry.
Paul