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    Digital Counter, 4 Digit, Frequency/Rev/Speed

    5 out of 5 based on 2 reviews | Write a review
    Digital counter is suitable for measuring the frequency, rotational speed, linear speed and flow of various types of control equipment. 4 digit counters can be customized as special test instrumentation for pulse width detection, duty ratio detection, etc.
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    Delivery date: 6-12 days

    Digital counter has 4 digit display, frequency/rev/linear speed measuring function, DC 12V/24V external power supply.


    • Various parameter settings, simple operation.
    • Input: Various waveform pulses (square wave, triangle wave), proximity sensor, photoelectric sensor, voltage signal, contact switch, encoder, etc.
    • Digital counter can also be used to measure the power frequency (AC 0-600V), measurement range: 0.01Hz-100KHz, resolution: 0.01Hz.
    • 4 digit display, decimal point automatic conversion.
    • Input/output signals photoelectric isolated, anti-interference ability.
    • Digital output: Up to 3 alarms, high value, low value, high and low value alarm modes are optional, analog output: 4-20mA or 0-10V transmission output, measuring range setting arbitrarily.
    • Standard RS232 or RS485 MODBUS RTU communication, can be directly connected with computers, PLC or other equipments.


    Mode ATO-DIGC-FA4
    Weight 300g
    Accuracy 0.1%±2 digit
    Power supply AC 220V/110V±15%, AC 90-260V, DC 24V±10%, power dissipation≤5VA
    Input signal Pulse signal, square wave, sine wave, 5V≤H≤30V, 0≤L≤2V, rising edge trigger, frequency: 0.01~10KHz, 1Hz-100KHz
    Display counting range -1999~9999
    Input impedance ≥10KΩ
    Transmission output 4-20mA, 0-10V, etc. (range can be set)
    Insulation resistance ≥100MΩ (between DC 500V power terminal and external terminal)
    Dielectric strength AC 1500V 1min (between power terminal and external terminal)
    Environment Ambient temperature: 0~50°C, relative humidity: 35~85%RH
    External power supply DC 12V±5%, 50mA max / DC 24V±5%, 30mA max
    Protection class IP65

    Selection table:

    Dimension (length*height*depth) Power supply AL1 AL2 Communication interface External power supply
    4: 48*48*80mm with hole size 45*45mm;
    9: 96*96*80mm with hole size 92*92mm
    V0: AC 90-260V;
    VE: AC/DC 12-30V, or DC 24V
    N: No output;
    R: Relay;
    N: No output;
    R: Relay;
    C0: No communication;
    C2: RS232;
    C4: RS485
    A: DC 12V/30mA;
    B: DC 24V/30mA;
    C: DC 5V

    Wiring diagram:
    Digital counter wiring diagram
    Tips: Digital counter application in digital system
    Counter is typical sequential logic circuit and also is the most used sequential logic devices in digital systems. Using a digital counter to count pulses or conduct fractional frequency can achieve measurement, calculation, timing control and other functions. In addition to the counting function, the counter also has functions such as asynchronous reset, preset parameter, and hold. The preset function is divided into two kinds: synchronous preset and asynchronous preset. The former is controlled by timing pulses, and the later is not controlled by timing pulses. The hold function is also divided into two types: hold-carry and hold without carry. The counter can also be used as a sequential pulse generator.

    In this video, ATO will show you how to wire a digital counter. And how to set the basic parameters of digital counter.

    Existing reviews of Digital Counter, 4 Digit, Frequency/Rev/Speed
    I am looking for a digital counter
    I am searching for a digital counter that will act with a sensor that will trace proximity from 15-20 centimeters.
    From: Torruco | Date: 08/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, you can use our 6 digit digital counter.
    Choice of digital counter
    I am looking for information on how I would use your photoelectric sensor and digital counter to stop a vfd when it hits a predetermined count. Is there a support forum for this of scenario?
    From: Miegel | Date: 14/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, simply, when ordering the digital counter, select output relay option from pull down menus. Our VFD has multi-function terminals X1, X2. So just connect output relay terminals to VFD "X1 & COM" and define XI as free stop, so can stop VFD when the digital counter hits a predetermined count as pre-programmed.
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