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F2A1X Frequency to Analog Converter/Tachometer


Regular price $249.00 Sale


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The F2A1X Frequency to Analog module converts a frequency input signal into a proportional analog voltage (0-5VDC) or current (4-20mA) output. The output signal is electrically isolated from the 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 pre-programmed 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 downloadable PM Remote Software. The PM Remote Software also displays data in real-time and allows data to be recorded to your PC in .csv format. The F2A1X requires 12-24VDC input power.


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


All models - Universal Input, non-contact operation from optical, infrared, laser, proximity, and magnetic sensors or direct TTL and 200mV to 50 Vac signals

  • Economically priced
  • Compact, rugged and lightweight construction
  • Electrically isolated input/output
  • Compatible with most speed sensors
  • 12 to 24VDC input power
  • User-configurable*
  • View real-time data on PC with free downloadable PM Remote Software*
  • Store data in .csv format in real-time*
  • 4-20mA or 0-5VDC scalable output
  • 5VDC or 10VDC sensor supply (jumper selectable)

    *Requires optional USB Programming Cable



Input Range 0.1 to 10,000 Hz (5 to 600,000 RPM) 5% @ 150mA max
Accuracy 0.005% 5% @ 150mA max
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
5VDC or 10VDC @ 75mA (user-selectable jumper setting)
Recommended Sensors LED - Monarch ROS-W Infrared - Monarch IRS-W Laser - Monarch ROLS-W Rugged Laser - Monarch RLS-W Magnetic- M-190, MT-190W
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 5VDC 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

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



*Specifications are subject to change without notice.

PM Remote Software

PM Remote Software is a free downloadable Windows-based software application that allows users to quickly and easily customize the configuration of Monarch’s ACT-1B, ACT-3X, F2A1X, and F2A3X panel tachometers. Set the mode of operation to RPM, RPS, or Frequency and select the input scale (pulses per revolution). Real-time data can be displayed directly on the PC along with min. and max values. Decimal places and display update rate are user-configurable.

Click here for complete details and to download the software.



  • Allows quick setup of ACT-1B, ACT-3X, F2A1X, and F2A3X
  • Display live data remotely on PC
  • Unit configuration can be saved for reloading in the feature
PM Remote Software Programmable Features


PM Remote Software Communications

Click here for complete details and to download software.


Shipping Codes for F2A1X Frequency to Analog Converter/Tachometer (all models):

Harmonized Tariff Code:  9029205000

Country of Origin:  US

Export Control Classification Number (ECCN):  EAR99


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