The NI SCXI-1126 is an eight-channel isolated frequency input module for SCXI. Each channel converts frequency to voltage with programmable input range, threshold, hysteresis, and filtering.
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The SCXI-1126 conditions frequency signals for a data acquisition system. Its output voltages can be multiplexed onto one DAQ input channel, allowing frequency and analog signals to be acquired within the same scan.
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| Input frequency ranges | 0–250 Hz; 0–500 Hz; 0–1, 2, 4, 8, 16, 32, 64, or 128 kHz — |
|---|---|
| Converted output range | 0–5 V |
| Threshold range | −0.5 to 4.48; extended with SCXI-1327 V |
| Hysteresis range | 0–4.98; extended with SCXI-1327 V |
| Output filter | 4-pole active lowpass — |
| Operating temperature | 0–50 °C |
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Manufacturer
Signal-conditioning platform
Isolated frequency input module
SCXI-1327 attenuator terminal block extends threshold and hysteresis ranges.
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No. It describes multiplexed scanning at a 3 µs interval, not input frequency. The highest frequency range is 0–128 kHz.
Minimum recommended input frequencies are 15 Hz, 600 Hz, 5 kHz, and 15 kHz for the 1, 40, 320, and 1000 Hz filters, respectively.