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F2A3X Frequency to Analog Converter/Tachometer with NIST Certificate


Regular price $385.00 Sale

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The F2A3X Frequency to Analog Converter is a DIN rail module that converts a frequency input signal into a proportional analog voltage (0-5 V dc) or current (4-20 mA) 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 F2A3X is completely user-programmable using the free downloadable PM Remote Software. A NIST Traceable Certificate is included.


  • Process monitoring over networks
  • Tachometer signal generator
  • Quality control
  • R&D
  • Engine performance
  • Signal conditioning
  • Data acquisition
  • Motor or pump monitoring


  • Standard DIN rail mounting
  • Ethernet communications available
  • 5 to 999,990 RPM range (0.083 to 150 kHz)
  • Compatible with most speed sensors (TTL)
  • 12 to 24 V dc input power
  • Alarm setpoint with optional relay output
  • Pulse repeater output
  • User-configurable
  • View real-time data on PC
  • 4-20 mA or 0-5 V dc scalable output
  • 10 V dc or 5 V dc sensor excitation
  • NIST Traceable Certificate included



Input Range 5-999,990 RPM speeds below 5 RPM possible with multiple pulses per revolution (0.083 Hz to 15.0 kHz)
Input Configuration and Voltage Range 1 to 9,999 pulse per revolution or use a scale factor of 0.0001 to 99,999; PC software programmable, TTL input and 1.1 V to 25 V dc signals – Internal Jumper for ±1 to ±25 V ac
Analog Output Voltage: 0-5 V dc, 5 mA max load, Isolated or 4-20 mA Isolated, 500 ohms max load, Internal 12 V compliance voltage, 16-bit resolution; full scale and offset RPM ranges PC programmable
Accuracy/Resolution 0.005% of full scale output / 76 µvolts or 30.5 nanoamps
Output Update Software selectable up to 244 times/sec; dependent on the input frequency
Memory Max and min. recall via PC software
Dimensions 1/8 DIN by 3.94 in. [100 mm] deep
Input Power Standard 12-24 V dc, 4.5 W max or optional 12 V dc to 24 V dc isolated 4.5 W max
Sensor Excitation 10 V dc @ 60 mA standard or 5 V dc @ 60 mA optional
Pulse Repeater Output 0-5 V TTL compatible, one pulse out for each pulse in; polarity is software selectable
Communications Ethernet RJ45 or USB type B
Alarm Capability

Optional alarm with relay output

Setpoints: high or low alarm limit, latching or non-latching PC programmable

Alarm Outputs 1 form C relay contact, rated 1A at 115 or 230 V ac
Alarm Reset Automatic or manual reset; front panel push button or remote reset via PM Remote Software

Indoor use only; installation category II per IEC 664

Temperature: -10 °C to 50 °C, operating per IEC 61010-1

Humidity: 80% max to temps up to 31 °C, decreasing linearity to 50% RH at 40 °C

Electrical Safety Meets EN61010-1:2001, EC low voltage directive 2006/95/EC


*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 rates 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 the software.


Shipping Codes for F2A3X 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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