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 ExcelTM. 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 acquisition
  • Motor or pump monitoring



 Input Range: 
 0.1 to 10,000 Hz (5 to 600,000 RPM)
  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.
 76 micro-volts or 30.5 Nano amps
 Environmental: Indoor use only, Installation category II per IEC 664
 Temperature: -10 deg. C to 50 deg. C operating per IEC 61010-1
 Humidity:Maximum relative humidity 80% for temperatures up to 31 deg. C, decreasing linearly to 50% relative
humidity at 40 deg. C.
Electrical Safety:Meets EN61010-1:2001, EC low voltage directive 72/23/EEC and 89/336/EEC.



6180-031USB 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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Reflective Tape - 5 foot roll, 0.5 inch wide (2 pack)

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

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



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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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 deg. F (125C) with 25 foot high temperature cable and mounting bracket

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6180-019GE200-HPGasoline engine electromagnetic inductive sensor and amplifier with 15 feet of cableBuy it now
6180-037MT-190WMagnetic Trigger Sensor/Amplifier with 8 foot cable and 3 tinned leadsBuy it now
6180-021IRS-WInfrared sensor with 8 foot cable, tinned wires and mounting bracketBuy 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