Model PR-243
Technical Information
TI.243-02
Pneumatic Pressure Transducer
Caution:
This product contains a half-wave rectifier power supply and
must not be powered off transformers used to power other devices
utilizing non-isolated full-wave rectifier power supplies.
Legend
S = Span Adjust
Z = Zero Adjust
+ = Supply Voltage
- = Output
Note:
If you are using grounded AC, the hot wire must be on the (+)
terminal. Also, if you are using a controller without built-in isolation,
use an isolation transformer to supply the PR-243 transducer.
Wiring PR-243 Units with VDC Output
PR-243 pressure transducers with VDC output are field selectable 0-5
VDC or 0-10 VDC output and can be powered with either 12-40 VDC
or 12-35 VAC. The following describes the proper wiring of these pressure
transducers with VDC output:
1. Remove the blue terminal block by carefully pulling it off the circuit
board.
2. Locate the (+), (-), and (0) terminal markings on the board.
3. Attach the power wires to the (+) and (-) terminals. The (-) terminal
is also the negative output terminal.
4. Connect the (0) terminal, which is the positive VDC output terminal,
to the controller’s input terminal.
5. Re-insert the terminal block to the circuit board and apply power to
the unit.
6. Check the appropriate VDC output using a voltmeter set on DC volts
across the (0) and (-) terminals.
TYPICAL APPLICATIONS (wiring diagrams)
Figure-1 and Figure-2
Illustrate typical wiring diagrams for the PR-243, 4-
20 mA, two-wire output pressure transducers.
+
–
+
–
+
–
mA Output
Transducer Only
12-40 VDC
Power Supply
Controller/
Meter/
Recorder
Shield/
Ground
Input Signal
Common
Figure-1 Wiring for mA Output
Pressure Transducers with
External DC Power Supply
+
–
mA Output
Transducer Only
+
–
Controller/
Meter/
Recorder
Shield/
Ground
Input Signal
Common
Figure-2 Wiring for mA Output Pressure
Transducers where Controller or Meter
has Internal DC Power Supply
Figure-3 and Figure-4
Illustrate typical wiring diagrams for the PR-243, 0-5/0-10 VDC
output pressure transducers.
+
–
Controller/
Meter/
Recorder
Shield/
Ground
Input
Signal
Common
12-35 VAC
Transformer
Hot
Neutral
+
–
VDC Output
Transducer Only
Common
+
–
Supply
Signal
0
Figure-3 Wiring for VDC Output Pressure
Transducers when applied with
External AC Supply.
PR-243 Pressure Transducers with mA Output.
Caution:
When multiple PR-243 units are powered from the same
transformer, damage will result unless all 24G power leads are
connected to the same power lead on all devices. It is mandatory that
correct phasing be maintained when powering more than one device
from a single transformer.
Page 2 of 4
1/4” Brass Hose Barb
(5/32 I.D. Tubing)
+–
ZS
Legend
S = Span Adjust
Z = Zero Adjust
+ = Supply Voltage
- = Common (Neutral)
0 = Output
1/4” Brass Hose Barb
(5/32 I.D. Tubing)
PR-243 Pressure Transducers with VDC Output.
+–
0
ZS