4-20mA Loop Powered Connection

I am connecting a 4-20mA signal from an RTD transmitter to an ABB ACH 550 drive.


My sensor is an ACI RTD Freezer Transmitter with a range of -200°C to +200°C.


Can someone tell me how I could connect my loop powered device to my drive?

+ on transmitter to 24V (Term 10)
- on transmitter to either AI1 or AI2 (Term 2 or 5) Depending on how you're using it.

psychosunshine said:

I am connecting a 4-20mA signal from an RTD transmitter to an ABB ACH 550 drive.


My sensor is an ACI RTD Freezer Transmitter with a range of -200°C to +200°C.


Can someone tell me how I could connect my loop powered device to my drive?

Click to expand...

I'd use wire.

But seriously, if you want to use the temperature measurement as the process variable for PID control, you'd typically connect to terminals AI2 (+) and AGND (-). You also need to set the J1 DIP Switch for a current input on AI2. AI1 is typically reserved for an external speed reference input.

Here's a link to the User Manual: https://www.ccontrols.com/support/dp/3AUA0000081823_REVC.pdf