The Yokogawa 720281 Frequency Module delivers high-resolution frequency measurement and analysis for dynamic signal capture across motion control and electrical testing applications. Built around a 1 MS/s sampling rate and 16-bit resolution, this two-channel isolated module converts pulse and encoder inputs into real-time frequency waveforms and trends with 625 ps time resolution. It measures frequency from 0.01 Hz to 500 kHz with ±0.1% DC accuracy, supporting RPM, duty cycle, period, pulse width, integration, velocity, and power supply frequency modes.
Technical Specifications
• Sampling Rate: 1 MS/s
• Resolution: 16-bit
• Time Resolution: 625 ps
• Channels: 2 isolated
• Measurement Frequency Range: 0.01 Hz to 500 kHz
• Maximum Input Voltage: 42 V direct; up to 420 V DC + AC peak with probes
• DC Accuracy (Frequency): ±0.1%
• Input Connectors: BNC
– Key Features
• Multiple measurement modes: frequency, RPM/RPS, duty, period, pulse width, integration (distance/flow), velocity, and power supply frequency
• Built-in signal conditioning with pull-up resistors, debounce filters, and selectable bandwidths for encoder and sensor inputs
• Real-time math functions including calculations, filters, FFTs, and correlations applied directly to frequency channels
• Synchronized capture of motion and electrical signals in a single instrument
– Typical Applications
• Encoder and pulse train analysis
• Motor speed and performance monitoring
• Duty cycle and pulse width measurements
• Flow and distance integration via frequency conversion
• Power supply frequency and stability analysis
• Multi-channel synchronous electrical and mechanical signal acquisition
– Compatibility & Integration
Fully compatible with Yokogawa DL950, DL350, SL2000, SL1000, and DL850 series data acquisition systems. Supports a broad ecosystem of probes and accessories including passive probes, high-voltage differential probes, current probes (50–120 MHz bandwidth, 0.5–30 ARMS ranges), logic probes, and adapter cables.
