Internet PLC Forum

General => Technical support => Topic started by: mauricetclarke on January 19, 2006, 05:39:32 AM

Title: Connection of Analogue inputs
Post by: mauricetclarke on January 19, 2006, 05:39:32 AM

Hi

We are setting up a T100 with 2 analogue input sensors.  We are ok with the wiring of the sensors, and getting 5V onto AVcc (Pins 13-15).  However, where does the AVss reference to?  I can't see it in the documentation.

Thanks for any help on this one.

Best Regards

Title: Re:Connection of Analogue inputs
Post by: support on January 19, 2006, 09:18:33 AM

AVss is the analog ground which is common to the PLC's 0V power supply. If you are connecting to external analog system you should provide a common ground reference between the PLC's analog ground and the external device analog ground. In case of 4-20mA sensor it will be the return terminal for the analog sensor connection.

Title: Re:Connection of Analogue inputs
Post by: mauricetclarke on January 19, 2006, 10:26:04 PM

Thanks for the advice.

All working now.   :)

Best Regards