User Manual
24 SLC™ 500 4-Channel Analog I/O Modules
Publication 1746-IN008C-EN-P - May 2004
Current-Loop Input Specifications for NI4, NIO4I, NIO4V, FIO4I, and FIO4V
Description Specification
NI4, NIO4I, NIO4V FIO4I, FIO4V
Input Range (Normal Operation) -20 to +20 mA 0 to 20 mA (nominal)
Absolute Maximum Input Current -30 to +30 mA 0 to 30 mA (maximum)
Absolute Maximum Input Voltage ±7.5V dc or 7.5V ac RMS
Current Input Coding -20 to +20 mA -16,384 to +16,384 0 to +2047
Input Impedance 250 Ohms
Resolution 1.22070 µA per LSB 9.765 mA per bit
Full Scale 20 mA
Overall Accuracy at +25° C (77°F) (max.) ±0.365% of full scale ±0.510% of full scale
Overall Accuracy at 0° to +60°C
(32° to 140° F) (max.)
±0.642% of full scale
(1)
(1) For improved accuracy over temperature, see SLC 500 Analog I/O Modules User Manual, publication 1746-UM005.
±0.850% of full scale
Overall Accuracy Drift (max.) +79ppm/5°C of full scale ±98 ppm/°C of full scale
Gain Error at +25° C (77° F) (max.) +0.323% ±0.400% of full scale
Gain Error at 0° to +60°C
(32° to 140°F) (max.)
±0.556% ±0.707% of full scale
Gain Error Drift (max.) ±67ppm/°C ±89 ppm/°C
Offset Error at +25° C (77°F) (max.)
(lin = 0, Vcm = 0)
±7 LSB ±2 LSB
Offset Error at 0° to +60°C
(32° to 140° F) (max.) (lin = 0, Vcm = 0)
±14 LSB ±4 LSB
Offset Error Drift (max.) (lin = 0, Vcm = 0) ±0.20 LSB/°C
±.14LSB/°C
(2)
(2) See the SLC 500 Fast Analog I/O Modules User Manual, publication 1746-6.9.
Overvoltage Protection 7.5V ac RMS (maximum)
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