EasyManuals Logo

Honeywell MCT404 User Manual

Honeywell MCT404
166 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #19 background imageLoading...
Page #19 background image
2. Before you begin
2.2. Transmitter/Communication characteristics
Revision 3 MC Toolkit (MCT404) User Manual 7
As indicated at key number (4) in Figure 2-2, the Honeywell Smart Transmitter includes a path for
digital communications between the sensor (via the microprocessor) and the 4-20 mA current loop that
connects the transmitter to external communications devices such as process control equipment
("receiver") and/or to a MC Toolkit.
Digital to-Analog Conversion and Transfer
The digital-to-analog converter (D/A) shown at key number (5) in Figure 2-1is shown as a box with a
dotted line to indicate that analog output mode is a user-selectable feature, for use in an application
whose receiving equipment requires an analog input.
Note that the Digital I/O (Comm) (communications) box (4) is shown in Figure 2-1with solid line to
indicate that the digital communications path is available at all times, even when analog mode is selected.
Honeywell Transmitter Output - Analog Mode
The diagram in Figure 2-2 provides an overview of a Honeywell transmitter operating in the analog
mode.
Analog (PV Signal) Output
The vertical scale at the left of Figure 2-2is an example of the available range (LRL to URL) of a
pressure transmitter sensor as built and characterized at the factory. The area of this scale that is
highlighted in white represents the configured process operating range (LRV to URV) - in this case, from
100 in H
2
O to 225 in H
2
O.
Note that Engineering Units (EUs) shown in Figure 2-2 are included here only for reference. The
transmitter does not perform any conversion of the base units’ value to Engineering Units. All
conversion to EUs is performed in the MC Toolkit and/or in other receiving devices such as operating
panels associated with control equipment. Default conversion is to inches-H
2
O @39F.)
The output of a Honeywell transmitter operating in the analog mode is a scaled value (0% - 100%) of
current (4 mA to 20 mA), whose lower and upper limits correspond to the configured operating range
(LRV-URV), respectively.
At the right of Figure 2-2, "PVEULO", "PV", and "PVEUHI" are examples of parameter names that
appear on Honeywell control equipment, which are used as follows.
Parameter Name
Parameter Description
Display Examples
PVEULO
Process Value , Engineering Units, Low
PVEULO 100 in H20
PV
Process Value
PV 175 in H20
PVEUHI
Process Value , Engineering Units, Low
PVEUHI 225 in H20

Table of Contents

Other manuals for Honeywell MCT404

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Honeywell MCT404 and is the answer not in the manual?

Honeywell MCT404 Specifications

General IconGeneral
BrandHoneywell
ModelMCT404
CategoryCell Phone
LanguageEnglish

Related product manuals