Rockwell Automation 1746-XXXX SLC 500 4-Channel Analog I/O Modules User Manual - Manual (Page 93)

Publication 1746-UM005B-EN-P - June 2004
Specifications A-3
Current-Loop Input
Specifications for NI4,
NIO4I, and NIO4V
Specification 1746-NI4, -NI04I, -NIO4V
Input Range (Normal Operation) -20 to +20 mA
Absolute Maximum Input Current -30 to +30 mA
Absolute Maximum Input Voltage ±7.5V dc or 7.5V ac RMS
Current Input Coding -20 to +20 mA -16,384 to +16,384
Input Impedance 250 Ohms
Resolution 1.22070 µA per LSB
Full Scale 20 mA
Overall Accuracy at +25° C (77° F) (max.) ±0.365% of full scale
Overall Accuracy at 0° to +60° C
(32° to 140° F) (max.)
±0.642% of full scale (1)
(1) Refer to Appendix C for a method to improve accuracy over temperature.
Overall Accuracy Drift (max.) +79 ppm/5 C of full scale
Gain Error at +25° C (77° F) (max.) +0.323%
Gain Error at 0° to +60° C
(32° to 140° F) (max.)
±0.556%
Gain Error Drift (max.) ±67ppm/° C
Offset Error at +
2
5° C (77° F) (max.)
(lin = 0, Vcm = 0)
±7 LSB
Offset Error at 0° to +60° C
(32° to 140° F) (max.) (lin = 0, Vcm = 0)
±14 LSB
Offset Error Drift (max.) (lin = 0, Vcm = 0) ±0.20 LSB/° C