How can I connect a Fluke 154 to a transmitter? 


The Fluke 154 can communicate to a transmitter to set-up settings and related operation parameters. 
However the transmitter needs an external power supply (24V) and the loop needs a 250 ohm resistor (also called Hart-resistor) to enable communications.

When the transmitter is inside an existing system, the needed components might already be available.
In case you own a Fluke Process Instrument already, which includes loop power and the "Hart resistor" you can use that to power the transmitter as well


Below is the schematic overview how to setup the connections physically with discrete components :