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NI 783731-01, 8 Analog Input Channels, 150 g, 16 Bits Resolution, NI-9203 C Series Current Input Module
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National Instruments 783731-01 NI-9203 C Series Current Input Module
The National Instruments 783731-01 (NI-9203) is an 8-channel, 16-bit C Series analog current input module designed for high-speed current measurements and industrial process monitoring within CompactDAQ and CompactRIO systems. Utilizing a Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC), the module provides a total sampling rate of 200 kS/s across its channels. It supports software-selectable input ranges, including unipolar 0 mA to 20 mA (330 nA/LSB scaling coefficient) and bipolar ±20 mA (660 nA/LSB scaling coefficient), featuring built-in overrange capacity of 6.5% unipolar and 5.5% bipolar to prevent signal clipping during unexpected input surges.
Dynamic signal conditioning features an input impedance of 138 Ω in parallel with 20 pF, a wide -3 dB input bandwidth of 850 kHz, and a rapid settling time of 5 µs to within 2 LSB. Measurement accuracy under calibrated conditions (25 °C ±5 °C) is characterized by low gain errors of ±0.04% for unipolar inputs and ±0.05% for bipolar inputs. Input protection includes single-channel overvoltage protection up to ±30 V maximum. The spring-terminal variant weighs 150 g and utilizes screw-flange fasteners (0.2 N·m torque) to hold wire connections securely. Its front-panel spring terminals accommodate copper wire gauges from 24 AWG to 12 AWG (0.2 mm² to 2.5 mm² with a 10 mm strip length) rated for 90 °C minimum, supporting up to two wires per terminal when using a 2-wire ferrule (0.25 mm² to 2.5 mm²).
Engineered for harsh industrial deployments, the NI-9203 operates across an extended temperature range of -40 °C to 70 °C and relative humidity from 10% to 90% non-condensing (Pollution Degree 2). Power consumption from the chassis backplane is capped at 399 mW maximum in active mode. Electrical safety features include 250 Vrms continuous channel-to-earth ground isolation up to 2,000 meters (validated by a 2,300 Vrms 5-second dielectric withstand test), with functional operation supported up to 5,000 meters altitude. When panel-mounted, the module withstands 30 g operating shock (11 ms half-sine pulse) and 5 g RMS random operating vibration from 10 Hz to 500 Hz, achieving an MTBF rating of 1,522,814 hours at 25 °C per Bellcore Issue 6 standards.
Part Number |
783731-01 |
|---|---|
Model Name |
NI-9203 |
Part Type |
200 kS/s, ±20 mA, 8-Channel C Series Current Input Module |
Type of ADC |
Successive Approximation Register (SAR) |
ADC Resolution |
16 bits |
Number of Channels |
8 Analog Input Channels |
Weight |
150 g |
Operating Temperature |
-40 °C to 70 °C |
Storage Temperature |
-40 °C to 85 °C |
Pollution Degree |
2 |
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