Measured variables, Signals from instrument to control system – Rockwell Automation 1734sc-IE4CH E+H Instruments via HART to PlantPAx User Manual User Manual
Page 121

Rockwell Automation Publication PROCES-UM002A-EN-P - July 2014
121
Cerabar S Pressure Transmitter
Appendix H
Measured Variables
Absolute pressure and gauge pressure, from which level (level, volume or mass) is
derived.
Signals from Instrument to Control System
h =
p
ρ
g
h
Item
Description
h
Height (level)
p
Pressure
r
Density of the medium
g
Gravitation constant
Signal
Details
Output Signal
4...20mA with superimposed digital communication protocol HART 5.0, 2-wire
Options:
• Maximum alarm: can be set from 21...23 mA
• Keep measured value: last measured value is kept
• Minimum alarm: 3.6 mA
This manual is related to the following products:
- 1734sc-IE2CH E+H Instruments via HART to PlantPAx User Manual 1769sc-IF4IH E+H Instruments via HART to PlantPAx User Manual 1794-IF8IH E+H Instruments via HART to PlantPAx User Manual 1756-IF16H E+H Instruments via HART to PlantPAx User Manual 1756-IF8IH E+H Instruments via HART to PlantPAx User Manual 1756-IF8H E+H Instruments via HART to PlantPAx User Manual