How to change a omron E5CN 220vac to a E5CN 24vdc

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patrick-Belgium

New Member

• Sep 11, 2023

• #1

Hello i have 2 omron E5NC that need a power supply of 100 -240vac
there is also a model omron E5NC that need a power supply of 24vdc

my question ; has someone a shematic of these temp controlers
i want to change my 100-240vac to powerd bij 24vdc

Best regards,
Patrick

 

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Diver300

Well-Known Member

Most Helpful Member

• Sep 11, 2023

• #2

I don't think that you have to change anything.

https://assets.omron.eu/downloads/manual/en/h134_e5an_e5en_e5cn_users_manual_en.pdf section 2.2

That seems to say that they will just work on 24 V ac/dc or on 100 / 240 Vac.

It can't hurt to try.

 

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patrick-Belgium

New Member

• Sep 12, 2023

• #3

a 220v version with 24v it dont start up needs 220v

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Sep 12, 2023

• #4

The manual linked above, seems remarkably vague, but the specifications say:

No D in model number: 100 to 240 VAC, 50/60 Hz
D in model number: 24 VAC, 50/60 Hz; 24 VDC

Click to expand...

I would imagine that they both run off 24V internally, and the 100-240VAC model just has a switch-mode mains PSU built-in.

It could well be possible to run it off 24V DC, but you would need to disassemble it, and disconnect the internal mains PSU.

I'd also suggest (if you were going to do it) to make sure the internal PSU does actually provide 24V out, and you might need to add a bridge rectifier to feed it from 24VAC, or polarity free 24VDC.

It's quite possible that it becomes perfectly obvious when it's in pieces.

 

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Diver300

Well-Known Member

Most Helpful Member

• Sep 12, 2023

• #5

patrick-Belgium said:

a 220v version with 24v it dont start up needs 220v

Click to expand...

I had missed the bit about the "D" in the part number.

 

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patrick-Belgium

New Member

• Sep 12, 2023

• #6

Hello Nigel, i think the same, the electronics inside will operate at a low voltage, the 100-200vac will be transformed inside, i opened one but is full of smd components, hard to find how thy do it. i will receive next week a "D" version witch is 24v and wil open them both to compare the boards dont want to break them as they are working

 

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Diver300

Well-Known Member

Most Helpful Member

• Sep 12, 2023

• #7

Please post some photos here. We can probably work out what bits do what if we can see them.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Sep 12, 2023

• #8

As Diver300 asked, post some photos from inside it.

 

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patrick-Belgium

New Member

• Sep 12, 2023

• #9

when i have the 24v received i will open them both and take fotos, so we can compare the boards

Thanks in advance for helping me

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Sep 12, 2023

• #10

patrick-Belgium said:

when i have the 24v received i will open them both and take fotos, so we can compare the boards

Thanks in advance for helping me

Click to expand...

If you post the pictures of the board you have, we may be able to make suggestions already.

 

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patrick-Belgium

New Member

• Sep 12, 2023

• #11

i have to 24v version within a few days, i will post the images asap