Device to convert AC input voltage to analog DC output

[AB2005]

Hi;

I need to monitor and log the 3phase AC input voltage for which I need a device to convert AC input voltage (say 350 - 440V) to analog (0-10v or 4-20mA) to connect with PLC. Has anyone used such device? Please share the make and models number.

 

[parky]

You will need 3 of them if you want to log all 3 phases plus 3 analogue inputs, the only other way is to use a power meter but this would require a communication & are expensive.

Here is a typical voltage to 4-20ma or 0-10v unit.
https://www.measurementsystems.co.u...t20p-vm-ao-s--voltage-signal-conditioner-acdc

 

[BryanG]

I agree that Power Meters need a different interface, but I have found that the prices have dropped a lot recently.
This is £169.00 with a modbus RTU output:
https://www.smartprocess.co.uk/mid-...tricity-meter-pulse-modbus-smartrail-x835-100
Or to go with a well known make, this is Siemens with a Modbus TCP output:
https://uk.rs-online.com/web/p/ener...ol_Gear_Whoop-_-Energy+Meters_Whoop-_-1809613
From these you can get Voltage, Frequency, Current, Power plus loads of other values.

If you just want one value then 4-20mA is the way to go. If you want more than one value then a bus connected device will give you a lot more data.