www.miinet.com
Moore Industries-International, Inc.
- 124 -
User’s Manual
238-760-00K
May 2019
Functional Safety Dual Input Smart HART® Temperature Transmitter
STZ
SECTION 8
Section 8 - Applications
This section provides some examples of typical applications for the STZ.
Point-to-Point Loops Deliver Analog Simplicity with Remote
Programmability
In the majority of applications, the STZ is installed on a point-to-point 4-20mA process loop like
a regular analog transmitter (Figure 8.1). A HART Communicator, HART-based system or FDT
Host is used to configure and view the transmitter’s operating parameters and diagnostic data
from any point on the loop.
Note:
The STZ provides 3 HART modes: Full Access, Read Only or Disable. This can only be
set using the DTM with MISP (Moore Industries Serial Protocol) RS-232 or USB programming
cable. It is recommended to operate with HART in Disable or Read Only mode while the STZ
is performing its safety function. This will prevent unauthorized or unplanned configuration
changes during operation.
Power
Supply
DCS
PLC
SCADA
PC
Data Recorder
Indicator
HART
Primary Master
or Non-HART
Communicating Device
–
–
+
+
4-20mA Analog with Digital HART
superimposed
Smart HART
Temperature Transmitter
HART Slave Device
(STZ in HPP enclosure shown)
HART Communicator
(Secondary Master)
NOTE:
The HART Communicator or PC with Smart HART
Interface Cable may be connected at any termination
point on the signal loop. The HART Communicator
and the signal loop must have between a 230 and
1100 ohm load for proper communications.
Figure 8.1.
From any termination point on the 4-20mA loop, you can view, test and change the transmitter’s operating
parameters using a HART Communicator or from a PC using PACTware (a HART modem is not required for PC setup).