1-5
03) are used with the Model 2700 Solu Cube, connect
them directly to the analyzer via TB2, terminals 1-11
(see Figure 1-5). The maximum cable length between a
single sensor and the analyzer must not exceed 1000
feet for proper operation.
Wiring More Than Two Sensors to Analyzer.
When
more than two input loops are to be used, a
J-Box (P/N 23054-02) is required as a connection point
for the loops. A single cable (P/N 661-898695) is then
used to connect the J-Box to one of the sensor inputs
on the analyzer. When more than five input loops are
used, two J-Boxes are required. The analyzer can
accept a maximum of two J-Boxes each with a maxi-
mum of four sensors.
The length of cable between a single J-Box, analyzer
and conductivity sensor (or pH preamp) must conform
to the following formula for proper operation.
Nx + n = 1000 feet.
N = # of sensors (or pH preamps) on a single J-Box
x = Length (in feet) of cable between a single J-Box
and analyzer.
n =Length (in feet) of the longest cable between a
single sensor and J-Box.
Wiring to a single J-Box is illustrated in
When two J-Boxes are required, wire both the same.
Connect each J-Box to one of the sensor inputs on the
analyzer. See schematic in
FIGURE 1-5. Wiring To Terminal Blocks.
MODEL 2700
SECTION 1.0
INSTALLATION AND QUICK START-UP
PIN
RS485
RS232
CURRENT
NAME
(-24)
(-23)
LOOP(-21)
OPT 1
D+
Trans Data
I +
OPT 2
D-
Recd Data
I -
OPT 3
COM
COM
N/C
Option Connections
DWG. NO.
REV.
270-762675
A
Wiring Considerations.
The following procedures are suggested to make it eas-
ier to connect cables to the terminal blocks in the Model
2700 Analyzer.
1.
Route cables through cutout provided in either
control panel , pipe, or wall mounting assemblies.
2.
Slip cable wiring through strain relief connectors, or
conduit connectors mounted in analyzer case.
3.
Strip away about 150mm (6 inches) of the cable
jacket.
4.
Connect wires according to illustration in Figure 1-5.
TB1 would be a good choice to start wiring. Start
connecting from the bottom up to avoid having to
work under existing leads.
5.
Dress leads carefully and tighten stain relief
connectors around cables.
6.
The terminal blocks on the Model 2700 may be
carefully removed to assist in wiring by depressing
the plastic tabs.
Sensor Wiring. pH and ORP sensors require pre-
amp J-Box P/N 23054-03
). This pre-amp
J-Box must be a maximum of 15 feet from the sensors.
Acceptable pH sensors are Rosemount Models 300-02-
54-99, 320HP-57, 328A-08, 389-02-54, 385-06/08-53,
396-54, 385+ -04, 381+ -31-41-52, 396P-02-54, 396R-54
and 399-04. Of these sensors, it is recommended to use
pH sensors with a Solution Ground: 381+, 385+, and
396P. The Model 2701 conductivity sensors can be
wired directly to the Model 2700 Analyzer.
NOTE
When wiring pH and ORP sensors to the pre-
amp junction box (P/N 23054-03) connect the
sensor’s outer shield to the ground ring pro-
vided with the preamp (minimize the length of
the exposed wire as much as possible). The
preamp J-box (P/N 23054-03 is wired to the
Model 2700 instrument using cable P/N 861-
898695. Connect the shield wire of this cable
to the second ground ring on the preamp J-
box (P/N 23054-03).
schematic of pH/ORP Sensor Wiring. If
pH/ORP readings appear unstable/noisy, run
a wire from terminal 2, TB2, on the J-box to
piping or other fixture near the sensor.
Wiring One or Two Sensors to Analyzer.
When just
one or two sensors (or pH/ORP pre-amps, P/N 23054-
NOTICE
Make sure power to Model 2700 Analyzer is
off before attempting to connect any wires
to the J-Box.
Содержание 2700
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