701280 - FREQUENCY INPUT MODULE

Measurement frequency of 0.01 Hz to 200 kHz, Measured parameters (frequency, rpm, period, duty, power supply frequncy, distance, speed)

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Tm Dl750 49All the functions and performance specs required for pulse measurement packed into a small, 2 CH module.

The module's internal high-speed CPU performs measurement, calculation, and recording in real time.

  • 9 measurement modes
  • 0.01 Hz-200 kHz
  • 40 µs (25 kHz) update rate
  • Max 16 ch
  • Directly records and measured results
  • Unlike with FV converters, rescaling is not necessary with this module. Directly record measured results. Display numerical values directly using cursors and auto measurements.

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1 Allowable input frequency range: 0.01 Hz 200 kHz


Real-Time Digital Filtering
The DL750 has 2 real-time digital filters that can be used for waveform averaging.
  • Smoothing Filter (Moving Average)
    • Smooth stair-step shaped waveforms. Updating occurs every 40 µs, giving a highspeed averaging effect. Filters are set at 0.1 ms-1 sec (up to the 25000th order). Filters reduce jitter in observed waveforms, and increases resolution.
  • Pulse Average
    • Useful for determining the average value per rotation, or determining the number of rotations when a gear is missing teeth. Output is averaged every specified number of pulses (between 1 and 4096 pulses).

 

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Variety of Signal Inputs
  • Direct-Coupled Signal Input
    • Encoder pulse input of up to ±42 V.
    • Direct input to EM (electromagnetic) pickups (1:1).
    • AC power up to 300 V (10:1 isolation probe 700929 required
  • Multiple Analog Inputs
    • Isolated input, 6 ranges, 4 input filters, internal pullup (mechanical contacts, supports open collector), AC/DC coupling, variable threshold value, 3 types of hysteresis
  • Chatter Elimination (Supports Mechanical Contacts)
    • Time setting: 1 ms-1000 ms
  • Convenient Input Presets
    • Presets for logic input (3 V-12 V), EM pickups, and AC power available in menus.
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Supports Braking Applications

By predicting the deceleration curve and stop point, the module automatically compensates for the lack of information on encoder pulses which occur during deceleration.

  • Deceleration Prediction (1)
    • Automatically calculates and outputs a deceleration curve based on the interval of the last input pulse.
  • Stop Prediction (2)
    • If no pulses are inputted for a period of time, a stop is inferred, and output is set to 0. Up to 10 steps can be specified.
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Offset Observation Function

An observational center (offset) is set and the area surrounding the offset can be zoomed. Useful when you wish to observe the fluctuation centering on a certain frequency.

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Trigger Support

Triggers can be activated on output results from all observation modes. For example, you can observe and trigger on a duty value.

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Frequency Module Applications
The 701280 Frequency Module supports all rotation and pulse measurements involved in encoder pulse measurement.

  • Automotive
  • For measurement of rotating devices such as engines and transmissions (rpm, speed, distance, fluctuations).
  • Effective for deceleration characteristics in braking applications such as ABS. Also used for duty analysis of oil pressure controllers.
  • Motor
  • For measurement of rotation, load characteristics, and fluctuations.
  • Robot
  • For multichannel measurement of encoder pulse, and motor analysis.
  • Office Automation
  • Office equipment, paper feed fluctuation analysis, copiers, and wow-flutter in laser printer drums.
  • Power Supply
  • High resolution measurement of power supply frequency (50/60 Hz) (0.01 Hz resolution, ±0.03 Hz accuracy)
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Tm Dl750 56Convenient LED

An LED accompanies each channel for confirmation of pulse input. Lights green during input, and turns red on a voltage overrange. You can confirm the input waveform condition at a glance.

 

 

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All Products Guide
All Products Guide
PDF (6.81 MB)
Contact info: (886)-2-2506-0980
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