Current measurement from LEM 100-S-0100

[SravanKumarAtla]

Hai guys.. Currently I'm facing some issues on Lem current sensor. LEM 100-S-0100 Im using NI 9201 AI +-10v module with LEM 100-S-0100 Sensor (0-5v) 100A I need to measure current from current sensor while giving trip Voltage. My expected current is 8.5-9A while passing trip Voltage I'm giving Tripping voltage to Enable PCB board. I need to measure that tripping voltage . I'm getting always 2.5v while passing trip and without trip Voltage. So can anyone please help me on this?

[SravanKumarAtla]

Hai...guys... I'm using LEM HO 100-s-0100 current sensor. I'm using Ni 9201AI module for measuring Current sensor o/p. From Lem sensor always I'm getting 2.5v while passing some trip Voltage through current sensor. But I need to measure 8.5-9 A from current sensor while passing trip Voltage. My Daq and current sensor is properly working. Can anyone me on this please...

[GerdW]

Hi Saisravan,

I didn't download the datasheet of that current sensor, but I guess it outputs a signal with 2.5V offset (representing 0A).

So what is your exact wiring? How do you read the voltage signal?

[SravanKumarAtla]

I attached datasheet of current sensor, LEM HO 100-s-0100 model I need to measure change in voltage of current sensor while passing trip Voltage to current sensor. I connected as per they mentioned connections, ie positive , negative, Vout , resistance. Plz go through once Datasheet, you will understand.