Figure 2 Functional Block Diagram For Transmitter In Analog Mode Of Operation - Honeywell ST 3000 User Manual

1.2 ST 3000 Smart Transmitters,
About the transmitter,
continued
Figure 2 Functional Block Diagram for Transmitter in Analog Mode of Operation.
Meter Body
DP or PP
Sensor
Temperature
Sensor
Static Pressure
Sensor
Pressure
February 2012 ST 3000 Release 300 and SFC Model STS103 User's Manual
Besides the process variable (PV) output, the transmitter also provides
its meter body temperature as a secondary variable which is only
available as a read-only parameter through the SFC when the transmitter
is in its analog mode. See Figure 2.
Factory
Characterization
Data
PROM
Microprocessor
A/D
When the transmitter is in its DE mode, the process variable is available
for monitoring and control purposes; and the meter body temperature is
also available as a secondary variable for monitoring purposes only.
See Figure 3.
Continued
Electronics Housing
D/A
Digital I/O
Modular Electronics
Proportional 4 to
20 mA PV output.
(Digital signal
imposed during
SFC
communications)
Terminal Block
Continued on next page
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