Hooked 120v to 24v Micro 1400

R-110 · Mar 23, 2022

Hello,
There was a mix up in information on some redeployed equipment and two of the micro 1400's that came in were hooked to 120v when they should've been 24v. I have changed the fuse on the power board on one of the micros but that still didn't get it to power up. Has anyone else repaired a unit after an incorrect voltage was used? How did you end up getting it to work?

Thank you.

Nova5 · Mar 23, 2022

Its Kaput. Dead. Murderized. Vanquished. Executed.

120v AC and 24vDC are totally different beasts. Its not coming back from that.

Fuses protect shorts/overcurrent. not Overvolt(to a point anyway).

Steve Bailey · Mar 23, 2022

You have a Norwegian Blue ML1400.

R-110 · Mar 23, 2022

I will notify next of kin and make the proper arraignments. Lol thank you for your time! I did teach myself soldering in the process so not all is lost by any means.

Nova5 · Mar 23, 2022

Steve Bailey said:
You have a Norwegian Blue ML1400.

he's Restin!

Mickey · Mar 23, 2022

R-110 said:
Hello,
How did you end up getting it to work?
Thank you.

Bought a new one.

JohnCalderwood · Mar 23, 2022

I did similar to a MiniGem80 PLC in a Nuclear power site many years ago, due to a drawing error.

At least in them days you could open these things up and see what parts had been melted.....

Nice looking door stop you have there..!

parky · Mar 23, 2022

Not exactly the same but I went to commission a S115 system, the customer always insisted on a power conditioner, when I powered up a few sparks, the PLC power supply was set at 110v (as it should be) however, the power conditioner was 240v/240v, so even though it was a 1:1 it was that good the output was 200v, managed to repair the PSU it turned out only the varistor had blown apart & the fuse. It was not our design but APC supplied the wrong one.

JaxGTO · Mar 23, 2022

Rockwell does have a repair exchange program, but they may say no when you tell them what happened.

johnd_125 · Mar 23, 2022

I had about the same thing happen, but to a Panelview PLus 7. Rockwell and my LD gave me the runaround on repair. After using it for a paperweight for awhile I ran across PLC Cables, Inc..
They repaired it for me for a fraction of what a new one cost and put a 6 mo. warranty on it.

Hooked 120v to 24v Micro 1400

R-110

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