PLT / PLX Series
DIGITAL DIFFERENTIAL PRESSURE TRANSMITTER
Copyright
2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
3
Installation
Wiring
LOCATION
: Select your site location , Clean and
dry, no shock and vibration, proper to the ambient
temperature and humidity in use.
PANEL MOUNTING
The PLT/X Series Digital Pressure Transmitter is
designed for panel mounting in a single
93mm diameter hole.
POWER CONNECTION
The following procedures are to be used to install a
standard 24V DC main power source.
1. Before connection, the user must first confirm that
the power specification is DC24V or AC100-220V.
2. Verify that the facility's main power source is
turned off or disconnected.
3. Connect lead cable to power terminal matching
polarity as shown in FIG.2 below. Take care that
wrong wiring will damage the Instrument and
malfunction (AC220V is not concerned to polarity)
CURRENT OUT CONNECTION(4-20mA)
The PLT sends a standard 2wire 4-20mA current out
1. Connect lead cable to current out terminal
matching polarity as shown in FIG.2 below.
2. Do not run the signal cable along with any high
voltage or power cable or put them in the same
race way. It may cause malfunction due to
induction.
A panel mounting fastening kit is provided with all
PLT Series Pressure Transmitter.
1. Select your site location, mark the appropriate
panel cutout and complete the necessary panel cut.
2. Carefully insert the Pressure Transmitter through the
hole from front of the panel.
3. Carefully insert the mount ring through the body of
PLT from back side.
4. Insert the snap ring to the snap ring groove.
5. Tightening four mount screw through the mount ring
from back side.
PRESSURE PORT CONNECTION
Tow(2) PT 1/8" barbed nipples are provided with all
PLT Series Pressure Transmitter
1. Wind teflon seal tape 3 or 4 times on the screw of
the nipple and tightening it in the pressure port
high and low
2. If you use the PLT to measure differential pressure,
high pressure is connect to 'HIGH" port, and low
pressure is connect to "LOW" port.
3. If you use PLT to measure single pressure,
positive pressure is connect to "HIGH" port and
negative pressure(vacuum) is connect to "LOW"
port. (In this case, another port is open to air)
4. Standard pressure connections are barbed fittings
for 3/16" I.D. tubing.
4~20mA(opt. rs485)
mA
Receiver
SUPPLY
24VDC
POWER
1
2
3
4
0
5
0
1
5
1
0
2
5
2
0
3
5
3
0
4
Max Value
Supply Voltage(VDC)
R
ec
ei
ve
rR
es
is
ta
nc
e(
)
50
700
800
900
600
500
400
300
200
100
20mADC
Vps-12.0
1200
1100
1000
1300
1400
F I G . 1
The ranges of optimum receiver resistance is
refer to below graph.
F I G . 2
PANEL
SCREW
MOUNT RING
SNAP RING
93mm HOLE
SNAP RING GROOVE
R Max =
