Rosemount 2015 Low Power Pressure Transmitter

30 years of 4-20mA current loops and I finally get a low power project.

I interpret the wiring diagram for the Rosemount 2051 Low Power (1-5Vdc) pressure transmitter as a 3 wire device: 2 wires for DC power, and a 3rd wire (referencing DC(-) ) for the 'load', the analog input.

The rectangle labeled 'voltmeter' or the box labeled 'B' represents the analog input.

Wiring diagrams from the manual and Quick Start Guide:

Can anyone confirm that it is indeed 3 wire?