AC power sensing module

rpoet · Aug 29, 2020

Does a solid-state module exist that senses 120AC input and triggers a 24VDC PLC input?

And yes, I know I can use a simple relay, but I have multiple circuits to monitor and when I add up the wattage of running all the coils 24/7, it's a surprising amount of W/h each year.

Everything Google is finding goes "the other way" and uses a low voltage control signal to switch an AC load.

Thanks,

rpoet

OkiePC · Aug 29, 2020

Since it is a lot of circuits, I would suggest using AC input modules for your PLC.

Bit_Bucket_07 · Aug 29, 2020

I agree with OkiePC. Just use 120VAC input modules, assuming that you are using a modular PLC.

Otherwise: https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2980717&library=usen&tab=1

rpoet · Aug 29, 2020

OkiePC said:
Since it is a lot of circuits, I would suggest using AC input modules for your PLC.

I said PLC to keep it simple. It's actually a device that doesn't have an option for 120VAC inputs. If it were a PLC, that's exactly what I would've suggested.

-rpoet

bulletin blues · Aug 29, 2020

Search for Solid state relay.

rpoet · Aug 29, 2020

bulletin blues said:
Search for Solid state relay.

Do you have a source for an AC-input, DC-output SSR? The common ones are the other way around. And unless someone is building them in "wafer-style" mountings, most I've seen are comically large for handling a few mA at 24VDC.

-rpoet

Bit_Bucket_07 · Aug 29, 2020

rpoet said:
Do you have a source for an AC-input, DC-output SSR? The common ones are the other way around. And unless someone is building them in "wafer-style" mountings, most I've seen are comically large for handling a few mA at 24VDC.

-rpoet

You don't like the Phoenix Contact relays?

https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2980717&library=usen&tab=1

rpoet · Aug 29, 2020

Bit_Bucket_07 said:
You don't like the Phoenix Contact relays?

https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2980717&library=usen&tab=1

This is exactly what I'm looking for. I dug through Phoenix's website and never saw these. I like PC's products, but their website is terrible! Thanks!

EDIT: Holy smokes! $73 each, and a month+ leadtime. Gotta love Phoenix Contact.

-rpoet

I_Automation · Aug 29, 2020

Same Thing - Wago

Loads less in my experience

rpoet · Aug 29, 2020

I_Automation said:
Same Thing - Wago

Loads less in my experience

Less than half the cost and available. We have a winner!

-rpoet

chelton · Aug 30, 2020

857-707 Would be the same thing in Wago.
857-357 Is a relay not solid state.

Bit_Bucket_07 · Aug 30, 2020

rpoet said:
This is exactly what I'm looking for. I dug through Phoenix's website and never saw these. I like PC's products, but their website is terrible! Thanks!

EDIT: Holy smokes! $73 each, and a month+ leadtime. Gotta love Phoenix Contact.

-rpoet

Well, now that you have a part number, ask around for equivalents from your local electronics dealers.

NetNathan · Aug 30, 2020

These are WAY cheaper.. and just as good..
I went from Phoenix to these when I found them...
https://www.idec.com/language/english/datasheet/RV8_Datasheet_CAN.pdf

110V Coil is RV8H-L-AD110.
Less than $20.00.....I pay $8.00

jdbrandt · Aug 30, 2020

bulletin blues said:
search for solid state relay.

+1

Gene Bond · Aug 30, 2020

https://www.automationdirect.com/ad...lays/slim_interface_relays/kpr-scf-115vacdc-1

AC power sensing module

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