
Falcon F35 Series Digital Panel Meter
Full 3-1/2 Digit, Bright Red 0.56" (14.2mm) Display
Broad Range Display Scaling
Short 2.94" (74.7mm) Deep, 1/8 DIN Case
Screw Terminal Connector for Easy Installation
Three User-Selectable Ranges: 4-20mA, 1-5V, 0-10V
Jumper-Selectable Decimal Point
Optional Isolated 9-32VDC Power Supply
Optional Excitation Output of 12VDC or 24VDC
DC Process
The Falcon Series digital indicators are premium quality
1/8 DIN meters for industrial applications. All Falcon units
feature jumper-selectable decimal point (internal and on
the connector for remote decimal point) and display scaling, providing wide application flexibility. In addition, signal
input ranges are easy to change with jumpers on the main
board. The Falcon has a 0.56" bright red LED display for
high visibility.
Installation and Panel Cutout
4.04"
102.5mm
3.59"
91.2mm
1.77"
3.78"
96mm
1.89"
48mm
0.44"
11.2mm
45mm
91.9mm
2.94"
74.7mm
3.62"
1.74"
44.2mm
2.2
56.5
Compactly designed for applications requiring minimal rear
panel depth, the Falcon fits a standard 1/8 DIN panel cutout (92mm x 45mm) and requires less than 3" behind the
panel. A screw terminal connector is a standard feature
for easy wiring of the power supply and signal input connections.
Engineering Label
Mounting Requirements
The Falcon series 1/8 DIN indicators require a panel cutout of 1.77"
(45mm) high by 3.62" (92mm) wide. To install the Falcon into a panel cutout, remove the clips from the side of the meter. Slide the meter through
your panel cutout, then slide the mounting clips back on the meter. Press
evenly to ensure a proper fit.
Engineering Label Placement
If replacement of the engineering unit label is required, place the tip of a
ball-point pen into the small hole at the base of the engineering label in
the bezel. Slide the label up until it pops out. Grasp and remove. Slide
the new label half the distance in, then use the ball-point pen to slide it
down into place.

Specifications
DISPLAY
Type: 7-segment, red LED
Height: 0.56" (14.2mm)
Decimal Point: 3-position programmable,
internally or on the terminal block
Overrange indication: most significant
digit = “1”; other digits blank
Polarity: Automatic, with "-" indication,
ENVIRONMENTAL
Operating Temperature: 0 to 55ºC
Storage Temperature: -10 to 60ºC
Relative Humidity: 0 to 85% non-condensing
Temperature Coefficient:
(±0.01% of input ± 0.05 count)/ºC
Warm-up Time: Less than 15 minutes
Response Time: Less than 1 second
"+" indication implied
NOISE REJECTION
POWER REQUIREMENTS
AC Voltages: 120 or 220VAC, ±10% 50/60Hz
DC Voltages: 9-32VDC, ±1%
NMRR: 50dB, 50/60Hz
CMRR: (w/1K⍀ unbalanced @ 60Hz):
90dB min.
Power Consumption: 3VA
ANALOG TO DIGITAL CONVERSION
ACCURACY @25º C
±0.1% of reading ±1 count
Technique: Dual slope integration
Rate: 3 samples per second, nominal
Wiring Diagram
2
1
IN HI
IN LO
Input Signal: Connect the signal to be monitored to the IN HI and
IN LO terminals. IN HI is terminal #1, IN LO is terminal #2.
Supply Power: Connect the supply power to terminals #11 and
#12. Note that if AC power is supplied, terminal #11 is for Neutral,
and terminal #12 is for Hot. If DC power is used, terminal #11 is for
-DC, and #12 is for +DC.
Display Hold: This feature allows you to hold the displayed value
indefinitely. A remote switch can be used to make the connection.
To activate the display hold, short terminal blocks #3 and #4 (Hold
Ref and +Ref). This connection must be kept isolated from other
circuitry. To hold multiple units, separate poles of the switch must
be used to maintain the isolation.
45
3
+REF
HOLD
-REF
These instruments are designed for maximum safety to the
operator when mounted in a panel according to instructions.
They are not to be used unmounted or for exploratory measurements in unknown circuits.
DP 1
67
DP2
DP3
8
DP C
10 11 12
9
+EXC
-EXC
AC GND
AC LO
-DC
AC HI
+DC
MECHANICAL
Bezel: 3.78"x 1.89" x .44"
(96 x 48 x 11.2mm)
Depth: 2.94" (74.7mm)
Panel Cut out: 3.62" X 1.77"
(91.9 x 45mm 1/8 DIN)
Case Material: 94V-1, UL rated Noryl®
Weight: 9.0oz (255.1g)
INPUTS: DC Process
Input Display Voltage Maximum
Range Resolution Drop Overload
4-20mA 10A 0.2V 100mA
(Input
Impedance)
1-5V 10mV 10M⍀ 100V
0-10V 10mV 10M⍀ 100V
Decimal Point Selection
From terminal block: The decimal point can be set from the rear
screw terminal block by connecting the appropriate decimal point
(DP 1, 2, 3, ) to the DP C terminal. The J105 jumper must be in the
D position (see diagram under "From front panel").
Decimal
Point Connect
1.999 DP C to DP1
19.99 DP C to DP2
199.9 DP C to DP3
1999 No Decimal
From front panel: The decimal point can also be selected by
removing the front bezel from the meter. Move the push-on jumper
J105 across the correct letter.
Decimal Jumper
Point Position at J105
1.999 A
19.99 B
199.9 C
1999 D*
* No Decimal Point
2
45
3
1
IN HI
IN LO
HOLD
-REF
+REF
6789
DP2
DP 1
DP3
DP C
10 11 12
+EXC
-EXC
AC GND
AC LO
-DC
AC HI
+DC
Before switching the instrument on, make sure the supply voltage matches the power source required of the instrument as
indicated on the hook-up label affixed to the instrument.
Process Range Selection
All Falcon Indicators are configured initially per the customer specifications. Range changes can be accomplished as follows:
Disconnect power from the unit. Remove the unit from the panel.
Remove the front bezel by inserting slotted screwdriver in the vertical
slots on either side of the bezel and then turning to pry the bezel off.
Unscrew the two Phillips head screws at either side of the circuit board.
Finally, push on the green connector assembly in the back of the unit
to slide the main circuit board out from the meter. Change jumpers
according to the chart below.
Note: If a new range is selected, the calibration procedure must also
be performed.
Range J102 J106 JU101 JU102
4-20 mA D P A No
1-5 V not field-selectable *
0-10 V B P V No
* Note: Conversion to or from 1-5V must be done at the factory
or a Simpson Authorized Service Center.
Note: JU101 and JU102 are hard wire jumpers, and are removed by
cutting them. Resoldering the JU jumpers is not recommended. If this is
required, or if a function is to be changed (from volts to current), Simpson
recommends returning the Falcon to the factory or an Authorized Service
Center. After moving the jumpers to the desired location, put the Falcon
back together and install in your panel, or proceed to calibration.
See Chart

Display Scaling
The Falcon can be easily scaled to display any engineering unit. For example,
if a 4-20mA signal is being monitored, and you want the meter to display 0100%:
1) Remove the front bezel with a small screwdriver.
2) Apply a known signal into the meter.
3) Span Adjustment - Adjust the potentiometer VR101 located on the right
side of the display board to the desired scaled value. Maximum value is up to
two times, or down to 1/5 the value of the input.
4) Offset Adjustment - Apply a 4mA signal (1V for 1-5V input, and 0V for 010 V input) to terminals #1 and #2, and adjust potentiometer VR 102 - located
to the left of the display, until the meter displays the desired scaled value. The
offset can be scaled up or down a maximum of approximately 250 counts.
5) Replace the bezel carefully. A card of labels is provided for alternative engineering units, such as percent.
Calibration
The Falcon is calibrated at the factory per order and scaled to read 0.100.0. If
you change the range, and have moved the jumpers, your Falcon will need to
be recalibrated.
1) Remove the bezel with a small screwdriver.
2) Apply the correct minimum value (4mA, 1V or 0V) to the instrument and
adjust VR102 (left side of display) until the meter displays or 0.00 (desired
minimum display value).
3) Apply the maximum input signal to the instrument.
4) Adjust the potentiometer (VR101) located on the right side of the display
board until the meter displays the value of the input signal or desired maximum
display value. For example, if a 20mA signal is applied, adjust the potentiometer until the display indicates 100.0.
5) Replace the bezel carefully, and install the meter.
Excitation Output
An optional feature of the Falcon is the 12VDC or 24VDC Excitation output.
The Falcon is set at the factory per your order to include an Excitation plug-in
printed circuit board in the range you specify. Excitation supply allows you to
power external transmitters and transducers without having to set up additional
DC power sources for them.
J201 Push-On Jumper
(Component Side)
24V Set-up
• 24V • • 12V •
12V Set-up
• 24V • • 12V •
Excitation
PCB
Solder
Side
If your application changes, you can easily change the Excitation value. The
Excitation supply can be reconfigured by moving push-on jumper J201 (located
on the Excitation board). To change the excitation output value, move the
jumper to the correct position shown in the diagram.
J104
J108

Application Example
The Quality Assurance department needs to
monitor the temperature of a calibration lab.
The display needs to be in the hall outside the
room so that readings can be checked without
having to enter the room.
A Falcon Process meter with a 4-20mA
transmitter can handle this application. The
Transmitter is designed to take a thermocouple input and emit a 4-20mA signal. By
ordering a 0-100ºF transmitter with a type T
thermocouple, the temperature can easily be
measured.
The Falcon meter should be scaled before it
is connected to the transmitter. Apply a 4mA
signal to the instrument and adjust potentiometer VR102 until the meter displays 0.00
(degrees). Then apply a 20mA signal to the
instrument. Adjust potentiometer VR101,
located to the right of the display, until the
meter indicates 100.0 (degrees). Carefully
put the bezel back on the meter. Remove
the signal input. The Falcon has an optional
12 or 24VDC excitation output to power the
transmitter, eliminating the need to mount an
external DC power source for the transmitter.
The thermocouple is suspended in the room,
and connected to the transmitter. The transmitter is attached to the Falcon, and the
Falcon is mounted in a box in the hall. The
meter will now indicate 0-100º, monitoring the
temperature in the calibration lab.
Ordering Information
Basic Unit
F35
3-1/2 Digit Indicator
1
2
3
Power Supply
120VAC
220VAC
9-32VDC
Range Excitation
71
72
73
4-20mA
1-5V
0-10V
0
1
2
None
12VDC
24VDC
Safety Symbols
The WARNING sign denotes
a hazard. It calls attention
to a procedure, practice, or
the like, which, if not correctly performed or adhered
to, could result in personal
injury.
The CAUTION sign denotes
a hazard. It calls attention
to an operating procedure,
practice, or the like, which,
if not correctly adhered to,
could result in damage to or
destruction of part or all the
instrument.
SIMPSON ELECTRIC COMPANY 520 Simpson Avenue, Lac du Flambeau, WI 54538 • (715) 588-3311 • FAX (715) 588-3326
www.simpsonelectric.com Printed in U.S.A. Part No. 6-115970, Edition 17, 02/09