Rockwell Automation Current Input Module - Manual (Page 52)

60 Hz. Line
Freq. Filter
Enabled
Line Freq.
Filters
Disabled
50 Hz. Line
Freq. Filter
Enabled
AĆ2
Appendix A
(Continued)
Input Circuit
D Input Current Range: 4-20 mA
D Resolution: 4
m A per count (4-20 mA = 0-4095 counts)
D Accuracy: 0.2% across the operating temperature range
D Input Filter: first order, lowpass, 7 Hz breakpoint
D Out of Range Threshold Voltages): below 3.7 mA or above 20.3 mA
D Input Impedance:10M ohms typical at 0 Hz at faceplate connector
ąĂ:250 ohms with Terminal Board
M/NĂ61C549 or 61C550 attached
Noise Rejection
D Line Frequency Filter (Software Selectable): 60 Hz (default) or 50 Hz
D Averaging Filter (Software Selectable): 1 (default) to 60 samples per
average
D Common Mode Rejection: Ć60dB min (averaging filter = 1 and line
filter enabled)
D Normal Mode Rejection: Ć40dB min (averaging filter = 1 and line
filter enabled)
Input Channel Update Times (All times are in milliĆseconds)
Number of
Configured
Channels
Unscaled
Data
Scaled
Data
Square
Root of
Scaled
Data
Running
Average of
Square
Root of
Scaled
Data
One 18.4 18.5 18.7 18.8
Each Added 17.6 17.7 17.9 18
Sixteen 282 283 286 288
One 2.0 2.1 2.3 2.4
Each Added 1.0 1.1 1.3 1.4
Sixteen 17 18.6 21.8 23.4
One 21.6 21.7 21.9 22
Each Added 20.8 20.9 21.0 21.1
Sixteen 333 334 337 339