PART THREE - OPERATION
SECTION 7 - HART OPTION
Model P33 pH/ORP Analyzer (panel-mount 1/4 DIN)
Rev. 6-1100
76
☞
7.3 SINGLE MODE
(Point-to-Point)
Wiring Arrangement
connected to each HART loop. Typically, the primary master
is a management system or a PC, while the secondary
master is usually a hand-held terminal.
NOTE:
All HART-equipped GLI analyzers are supplied with
their
SINGLE MODE/MULTI-DROP
switch set to
the
SINGLE MODE
position to preserve analog
Output 1 for normal use.
To set the analyzer operating mode for the HART network,
locate the
SINGLE MODE/MULTI-DROP
switch (Figure 3-2)
and set the switch to the desired mode:
•
SM
(up) position for SINGLE MODE
•
MD
(down) position for MULTI-DROP mode
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87
P$
56
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60
+$
57
0'
FIGURE 3-2 Location of SINGLE MODE/MULTI-DROP Switch
(HART-equipped analyzers only)
When the GLI analyzer is set to operate the HART network
in the SINGLE (Point-to-Point) MODE, the master(s) is in-
tended to communicate with only a single analyzer. Refer to
Figure 3-3 and connect all devices, including up to two
masters, to the 4-20 mA analog Output 1 signal.
FIGURE 3-3 HART SINGLE MODE (Point-to-Point) Wiring Connections (for single analyzer)
