Micro 820 and Panelview 800

Brad7778

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• Jun 28, 2017

• #1

Hello I am new here and very green with plc's. I have dealt with them in school for my electrical apprenticeship and that is the only time.


To get to my question now. I have a micro 820 that had it's LED's flashing and seemed to be in working order yesterday. I turned the disconnect off for the night and now it won't come back this morning. I checked my voltage and it is within the suitable range.

Next I have a Panelview 800 2711r-t4t and I have the 24vdc to it and it doesn't want to even show me any signs of life. What could I be missing?

Thanks in advance.

Brad A.

 

Brad7778

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• Jun 28, 2017

• #2

More....

Can I hook up the 24vdc and leave the communications not hooked up. Or does everything have to be hooked up for it to turn on?

 

rQx

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• Jun 28, 2017

• #3

Something should happen if you apply 24VDC to it, it shouldn't be dead if it's working at all.

 

Brad7778

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• Jun 28, 2017

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..

It's strange situation. I replaced it with another Panelview and it's still doing the same thing, the only light that blinks is the fault light when I turn the power off. The other equipment that requires the 24vdc is working.

 

Dirt

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• Jun 28, 2017

• #5

Did you measure that you actually have 24V at the panel when the power supply is connected to it and all other consumers?

 

Brad7778

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• Jun 28, 2017

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Yes I tested it multiple times. I get around 24 to 28vdc

 

Dirt

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• Jun 28, 2017

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Another dumb one then, did you measure AC as well? Just to confirm there's no AC at the same time.

Weird with 3 different things breaking and not being something they have in common

 

Last edited: Jun 28, 2017

rQx

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• Jun 28, 2017

• #8

What kind of power supply it is?

 

Brad7778

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• Jun 28, 2017

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Yes the a.c. voltage and it's within the nominal voltage.

 

Brad7778

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I am just using a 120v to 24v transformer with a bridge rectifier and a diode for surge suppression. Should I be using a specific power supply?

 

Last edited: Jun 28, 2017

Dirt

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• Jun 28, 2017

• #11

Brad7778 said:

Yes the a.c. voltage and it's within the nominal voltage.

Click to expand...

I meant if there's any AC present on the secondary side, the DC side (if there's any AC component in the actual DC).

 

labeledas

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• Jun 28, 2017

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what is the DC output amperage rating on your transformer

 

rQx

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Brad7778 said:

I am just using a 120v to 24v transformer with a bridge rectifier and a diode for surge suppression. Should I be using a specific power supply?

Click to expand...

Try change the power supply to a switching power supply. You wont get a good DC voltage with transformer. I have tried a similar setup once and also experienced problems.