Frequency/Rate Meter


24 VDC/24 VAC, 5 digit, Input: NPN input/voltage pulse input

Power supply voltage 24 VAC (50/60Hz)
24 VDC

Item list of K3MA-F

  • Ratings/Characteristics
Power supply voltage24 VAC (50/60Hz)
24 VDC
Allowable power supply voltage range85% to 110% of the rated power supply voltage
Power consumption24 VDC: 4.5 W max.
at 24 VAC: 4.5 VA max.
External power supply12 VDC 40 mA
Pulse measurement input (Input type)No-voltage contact/NPN/PNP/Voltage pulse
Pulse measurement input (No-voltage contact)30 Hz max. ON/OFF pulse width of 15 ms min.
Pulse measurement input (Voltage pulse)Input frequency range: 5 kHz max. ON/OFF pulse width of 90 us min.
(Voltage level: ON voltage: 4.5 to 30 V; OFF voltage: 0 to 2 V; input impedance: 10 kΩ)
Pulse measurement input (Open collector)Input frequency range 5 kHz max. ON/OFF pulse width of 90 us min.
Pulse measurement input (Accuracy)±0.08% rdg ±1 digit
Connectable sensorON residual voltage: 2.5 V max.
OFF leakage current: 0.1 mA max.
Load current: Must have a switching capacity of 15 mA or higher. / Must be able to properly switch load currents of 5 mA or less.
Display method7-segment digital display
Character height14.2 mm (green/red)
Zero suppressYes
Decimal point display positionSelected with parameters
Key protectOperation/Adjustment Lockouts / Setting Level Lockouts / Setting Change Lockout
Filters functionAverage processing
Display functionDisplay Color Selection / Display auto-return
Output functionComparative Output Pattern / Startup Compensation Timer
Ambient temperatureOperating: -10 to 55 ℃
Storage: -25 to 65 ℃
Ambient humidityOperating: 25 to 25%
Storage: 85 to 85%
AccessoriesWaterproof packing / Fixtures / Terminal cover / Unit label / Instruction manual
WeightApprox. 200 g
A/D conversion methodCycle measurement
Comparative output response time750 ms max.
Insulation resistance20 MΩ min. (at 500 VDC) between external terminals and case. Insulation provided between inputs, outputs and power supply.
Dielectric strength2,000 VAC 1min (between external terminals and case)
Noise immunity±480 V at power supply terminals in normal mode ±1,500 V at power supply terminals in common mode (waveform with 1-ns rising edge and pulse width of 1 us/100 ns)
Vibration resistanceMalfunction: 10 to 55 Hz, Acceleration: 50 m/s**2, 5 min 10 sweeps each in X, Y, and Z directions
Shock resistanceMalfunction: 150 m/s**2, 3 times each in 3 axes 6 directions
Degree of protectionFront panel: NEMA4X for indoor use (equivalent to IP66)
Rear case: IP20
Terminals: IP00 + finger protection (VDE0106/100)
Memory protectionEE-PROM (non-volatile memory) Number of rewrites: 100,000
  • Dimensions

  • Terminal arrangement

  • Internal connections


Frequency/Rate Meter


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