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4-ch High Speed Counter/Frequency Module Minimum Pulse Width: 1μ sec. (Frequency/Counter Mode). Function Mode: Counter (Up/Down, Bi-direction, Up, A/B Phase) Frequency. Input Frequency: Frequency Mode: 5Hz ~1MHz Counter Mode: 1MHz max.. Isolated Voltage: 2500 Vdc. Programmable Digital Noise Filter: 1~65000μ sec.. 4 channels for Counter, 8 channels for...