Operating Modes; Functions - Emerson Rosemount 326P Quick Start Manual

Quick Start Guide
00825-0100-4327
Pressure range
1B
1.2

Operating modes

The wiring configuration sets the operating mode. After wiring the pressure transmitter, it
automatically recognizes the connections and changes to the respective operating mode.
For more information, see
1.2.1 Two-wire operation
OUT2 (pin 2)
1.2.2 Three-wire operation
OUT1 (pin 4)
OUT2 (pin 2)
1.3

Functions

The Rosemount 326P Pressure transmitter performs the functions described in this
section.
1.3.1 Switching function
The switching function is available only for three-wire operations. OUT1 or OUT2 changes
its switching status if the pressure is above or below the set switching limits (SPx, rPx).
These switching functions are available:
• Hysteresis function/normally open: OUx = Hno
• Hysteresis function/normally closed: OUx = Hnc
First set the set point (SPx), then the reset point (rPx) with the requested difference.
• Window function/normally open: OUx = Fno
• Window function/normally closed: OUx = Fnc
Set the width of the window using the difference between SPx and rPx. SPx is the upper
value and rPx is the lower value.
Quick Start Guide
Burst pressure limits
5075
Electrical connection.
The analog signal proportional to pressure (4-20 mA or 20-4 mA).
Switching signal for system pressure limit value
• Switching signal used for system pressure limit value
• Analog signal proportional to pressure (4-20 mA or 20-4 mA)
350
(Figure 1-1)
(Figure 1-1)
(Figure 1-2)
(Figure 1-2)
Introduction
January 2019
7