Monarch Instrument  


Monarch Instrument
15 Columbia Drive
Amherst, NH 03031
ph: (603) 883-3390
Fx: (603) 886-3300

Panel Tachometers: F2A1X Frequency Converter/Tachometer

The F2A1X Frequency to Analog module converts a frequency input signal into a proportional analog voltage (0-5Vdc) or current (4-20mAdc) output. The output signal is electrically isolated from input signal and input power source effectively eliminating troublesome ground loops. The input signal can be supplied from a Monarch sensor (measuring RPM for example) or any source of digital signal not exceeding 12 volts. The F2A1X is factory preprogrammed with the full scale output and input scale factor of your choice. These settings are also user configurable with the optional USB programming cable and PM Remote Software. PM Remote Software also displays data in real-time and allows data to be stored directly to Microsoft Excel. The F2A1X requires 12-24Vdc input power.



  • Economically priced
  • Compact, rugged and lightweight construction
  • Electrically isolated input/output
  • Compatible with most speed sensors
  • 12 to 24 Vdc input power
  • User configurable*
  • View real-time data on PC*
  • Store data in Excel file in real-time*
  • -20mA or 0-5Vdc scalable output
  • 5Vdc or 10Vdc sensor supply (jumper selectable)
  • *Requires optional USB programming cable and PM Remote Software 

Typical Uses 

  • Process monitoring
  • Tachometer signal generator
  • QC and R&D
  • Engine performance
  • Signal conditioning
  • Data aqcquisition
  • Motor or pump monitoring



Input Range:                                0.1 to 10,000 Hz (5 to 600,000 RPM)

Accuracy:                                     0.005%
Resolution:                                  1 RPM
Dimensions:                                 L x W x H = 80 x 40 x 28 mm (3.2 x 1.6 x 1.2 inches) excluding the mounting wings
Power Supply:                             12 to 24Vdc ± 5% @ 150mA max
Inputs:                                           TTL input or ± 3Vac to ± 12Vac
                                                        Programmable using PM Remote Software and USB programming cable.
Sensor Excitation:                       5 Vdc or 10 Vdc @ 75mA (user selectable jumper setting).
Recommended Sensors:          Optical - Monarch ROS-W
                                                        Proximity - Monarch P5-11
                                                        Infrared - Monarch IRS-W
                                                        Laser - Monarch ROLS-W
Current Output Option:              4 to 20 mA out, 16 bit resolution (0.0015%) 10Vdc compliance voltage. Zero and Full scale RPM settings as specified when
                                                        ordered or programmable using PM Remote Software and USB programming cable.
Voltage Output Option:              0 to 5 Vdc out, 5 mA, 16 bit resolution (0.0015%). Zero and Full scale RPM settings as specified when ordered or programmable
                                                        using PM Remote Software and USB programming cable.
Resolution:                                   76µvolts or 30.5 Nano amps
Environmental:                             Indoor use only, Installation category II per IEC 664
Temperature:                               -10°C to 50°C operating per IEC 61010-1
Humidity:                                       Maximum relative humidity 80% for temperatures up to 31°C, decreasing linearly to 50% relative
                                                        humidity at 40°C.
Electrical Safety:                          Meets EN61010-1:2001, EC low voltage directive 72/23/EEC and 89/336/EEC.



6180-031 USB Programming
Cable and PM Remote Software

3 ft. USB Programming Cable and Windows compatible PM Remote software package. 
Allows user configuration of operation mode, analog output scaling, decimal places, display 
update rate and input pulses per revolution. View real time data in digital format and/or through
Microsoft Excel. 
++++++Required for ACT-1B, Optional for ACT-3X with 3.5mm phone plug communication port++++++

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6180-069 T-5

Reflective Tape - 5 foot roll, 0.5 inch wide (2 pack)

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6180-079 T-5WP

Waterproof Reflective Tape (honeycomb pattern) - 5 foot roll, 1 inch wide

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6180-Cal CAL-N.I.S.T.

N.I.S.T. Traceable Certificate of Calibration / Re-Calibration 




6180-030 ROLS-W

Remote Optical Laser Sensor with 8 foot cable, 4 tinned leads, mounting bracket with jam nuts and 12 inches of T-5 reflective tape

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6180-056 ROS-W

Remote Optical Sensor with 8 foot cable, mounting bracket and 12 inches of reflective tape

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6180-057-25  ROS-P-25 

Remote Optical Sensor with 25 foot cable, mounting bracket and 12 inches of reflective tape

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6180-058-25  ROS-HT-W-25 

Same as 6180-056 for high temperature applications (to 257 degrees F (125C) with 25 foot high temperature cable and mounting bracket  

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6180-019 GE200-HP Gasoline engine electromagnetic inductive sensor and amplifier with 15 feet of cable Buy it now
6180-037 MT-190W Magnetic Trigger Sensor/Amplifier with 8 foot cable and 3 tinned leads Buy it now
6180-021 IRS-W Infrared sensor with 8 foot cable, tinned wires and mounting bracket Buy it now

F2A1X Frequency to Analog Converter/Tachometer ordering information:


F2A1X F2A1X F2A1X Frequency to Analog Converter, Click "ORDER" to configure exact model Buy it now

User Manuals

F2A1X (English)





©2008 Monarch Instrument