MODEL 865
TRANSDUCER
INSTALLATION
The Model 865 Pressure Transducer is a compact
instrument with an LCD Display. It is used for
measuring and controlling the many different media
that are compatible with our sensing element.
Positive, negative, and differential pressures can be
measured in ranges from 0-0.5” WC to 0-15 PSI with
four standard outputs: 1-5VDC, 1-6VDC, 1-10VDC
and 4-20mA. Split ranges and custom outputs are also
available.
INSTALLATION
1. Location- The model 865 pressure transducer
should be placed in as clean, dry and vibration free a
location as possible.
2. Pressure Connections- The 865 pressure
transducer uses 2 barbed fittings for use with 1/8” ID
vinyl or rubber tubing. Attach tubing from positive
pressure or higher pressure source to port marked
High (P1) and lower or negative pressure to opposite
port (P2). Arrange tubing to minimize stress on
connections. If possible, mount with ports facing
down to aid in moisture drainage.
Note: When removing tubing care should be used to
avoid breaking the ports. In some cases the tubing
should be cut off, rather than pulled off, especially if
stiff tubing is being used.
3. Mounting- Attach the Model 865 transducer to
the mounting surface using 2 fasteners inserted
through the two mounting holes located on either the
side mounting flanges, or the holes at the top of the
case. Do not over-tighten.
ELECTRICAL CONNECTIONS
All electrical connections to the 865 series transducer
are made to the pluggable screw terminal block. The
block is coded as follows.
1)”+IN ” = Supply Positive,
2) “ COM “ = Common Supply & Signal Negative.
3) “ +OUT“ = Signal Out(positive).
An external power supply (Vs) delivering
12 - 24 VDC or 24VAC with a minimum of 40mA
output is required to drive the unit. However, if the
transducer has a 1-10VDC output, or a 4-20mA
output to drive a 500 ohm load, a minimum of
18VDC/24VAC is required.
Do not exceed specified
supply voltage. Do not apply voltage to
“+OUT” terminal as permanent
damage will occur.
3 WIRE CONNECTION
3 WIRE TO 2 WIRE CONNECTION
CONVERTING 4-20MA TO 1-5 VDC
865 Series Pressure transducers with a 4-20mA
current output can be easily adapted to controllers
requiring 1-5 VDC input. Insert a 250 ohm resistor
between the “+” and “-” controller input terminals.
This will safely convert the 4-20mA signal to 1-
5VDC.
OFFSET
The offset of the 865 series transducer is factory set. If
it should need adjustment upon arrival, the offset pot
is located next to the ports on the end of the unit.
With the transducer installed and no pressure applied
place a meter in series with the negative “-“ and the
ground. Turn offset adjusting pot to desired reading.
CUSTOMER SERVICE
If any problems are encountered during installation
please call the number below for assistance.
Call 1-800-735-8998
7638 Washington Ave S
Eden Prairie, MN 55344
+1.800.735.8998 • +1.952.942.8743
FAX +1.952.942.8753
www.controllersensors.com
IN-865 Rev A
• + Power Supply
• - Power Supply
• Signal IN
CONTROLLER
• + Power Supply
• - Power Supply
• - Ctrl Negative
• Ctrl Ground
(1 pages)
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