PR55047_2CR loop sensor wiring

Hardware
1

Hi, I’ve been trying to get a sensor connected to PR55-47_2CR but running into some trouble. I’m testing with this https://www.amazon.com/gp/product/B07T9CJDZ1 but not getting any power (it works fine with PR33-7). I’m not seeing any voltage at V but was expecting this to read 16V, am I doing something wrong?

2

Hi,
does the 4-20mA generator provides loop supply?
if not you will need to add loop supply.

Thanks

3

It doesn’t, I thought based on this " * On Board 16V Supply to Power up the external 4-20mA Devices" on the product page it would provide power.

4

Yes, the on board supply could be used.
You will have to include this supply in your loop.

Wiring ncould look somethign like this

4-20mA +ve ( board) >>> sensor 4-20mA +ve
4-20mA -ve ( board ) >>>> 16V supply +ve
sensor 4-20mA -ve >>> 16V supply Gnd

5

OK so this is the part that’s confusing me - where is the on board supply? It looked like from the drawings V should provide power so I assume I should be able to measure 16V between V and ground but a multimeter shows 0V.

I’m trying to use this with the ethernet modem and am receiving broadcasts from this so I know it’s on and transmitting at least.

Thanks for your help by the way, I appreciate it.

6

Hi,
you will see any voltage only when the device is taking sample, rest of the time the power supply is kept off to save power.

Thanks