National Instruments SCXI-1120 Cold-Junction Sensor

Specifications Appendix A
SCXI-1120 User Manual A-2 © National Instruments Corporation
Rise time
4 Hz 0.12 sec
10 kHz 70 µsec
Slew rate 0.15 V/µsec
Noise (400 kHz bandwidth)1
Input (gain = 1,000)
4 Hz filter 100 nVrms
10 kHz filter 4 µVrms
Output (gain = 1)
4 Hz 150 µVrms
10 kHz 1 mVrms
Operating common-mode voltage 50 or 60 Hz
Channel to channel or
Channel to earth 250 Vrms5
Common-mode rejection ratio,
50 or 60 Hz
1 kΩ in input leads 160 dB minimum at 4 Hz bandwidth
NMR (50 or 60 Hz) 60 dB at 4 Hz bandwidth
Input protection (continuous) 250 Vrms maximum
Output protection Continuous short-to-ground
Power dissipation 7.5 W maximum
Cold-Junction Sensor3
SCXI-1320
Accuracy 1.0° from 0° to 55° C
Output 10 mV/°C
SCXI-1328
Accuracy40.35° from 15° to 35° C
0.65° from 0° to 15° and 35° to 55° C
Output 1.91 to 0.58 V from 0° to 55° C
1Includes the combined effects of the SCXI-1120 and the AT-MIO-16F-5
2Includes the combined effects of the SCXI-1120 and the AT-MIO-16X
3Located on the SCXI-1320 and SCXI-1328 terminal blocks
4Includes the combined effects of the temperature sensor accuracy and the temperature difference between the
temperature sensor and any screw terminal
5Module tested using the UL 1244 standard to twice the working voltage + 1,000 Vrms