Romilly's HART® and Fieldbus Message Board

Simplest possible HART Master

Hello,

I am developing a product to which you can connect any 4-20mA transducer. It contains an ADC and a uP (which has two UARTs, one of which is unused), and the 4-20mA value is readable via an RS232 serial port. Simple so far.

Now I would like to add HART (Master) capability. I don't need to write any HART software yet but I need to have all the required hardware in place.

I have done some digging and found the A5191HRT and SYM20C15 chips. Is this all I need, with them connecting simply to my 2nd UART and into the 4-20mA loop, or is there some additional stuff which is needed?

Also, which of these (or any other) chip is the best one to use, in say 100+ quantities?

Any feedback much appreciated.

Peter

Follow Ups:

• Re: Simplest possible HART Master Paul Nijdam 2002/03/09 15:44:41 (3)
  • Re: Simplest possible HART Master Marcelo Ortolan 2003/10/31 14:43:24 (0)
  • Re: Simplest possible HART Master Vit 2002/04/28 14:24:44 (0)
  • Re: Simplest possible HART Master Peter 2002/04/24 12:05:30 (0)

Post a Followup