Rockwell Automation 61C544A RTD Module - Manual (Page 48)

AĆ2
Appendix A
(Continued)
Input Circuit
D Resolution: 0.1 o C
D Accuracy: 0.2% across the operating temperature range
D Input Impedance: 1000 Meg Ohms typical at 0 Hz
D Input Filter: first order, lowpass, 7 Hz breakpoint
D Input Overvoltage Protection: 115 V (rms) continuous
System Accuracy
D 4ĆWire RTD Elements: RTD element tolerance + 0.4%
3ĆWire and 2ĆWire RTD Elements: RTD element tolerance + 0.4% +
error term (from Appendix E)
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:-60dB min (worst case value with the
averaging filter = 1)
D Normal Mode Rejection: -40dB min (worst case value with the
averaging filter = 1)
Timing
D Update Time per Channel: 18.5 msec at 60 Hz
22.0 msec at 50 Hz
D Channel Scan Time (16 Channels Configured):335 msec at 60 Hz
400 msec at 50 Hz
D Integration Period (60 Hz): 16.67 msec per temperature
conversion per channel
(50 Hz): 20.00 msec per temperature
conversion per channel