Spectrum Controls 140 ACI 051 00sc - Manual (Page 47)

Installation Instructions
32-Channel Analog Input Module
Quantum Series 140 AxI 05x 00sc
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6.4 Channel Update Rate
The module’s channel update rate is determined by the filter frequency
selection. A lower filter frequency takes longer to update each channel.
The following table shows the single channel update rate and 32 channel
update rate for each filter frequency.
Filter -3db 1 channel 32 channel
Frequency Frequency Update Time Update time
10 Hz 2.62 Hz 308 ms 9.9 sec
50 Hz 13.1 Hz 68 ms 2.2 sec
60 Hz 15.7 Hz 58 ms 1.9 sec
1K Hz 262 Hz 12 ms 384 ms
+ Note: Channel update time is the time required for the module to acquire an input sign and update
the module’s data registers. The scan rate of the Quantum system will vary with application
ladder and system configuration.
+ Note: Periodic system calibration will also effect channel update times for one scan cycle.
6.5 System Resolution and Accuracy
The system resolution listed below is the smallest input signal change that
the ADC can detect. The resolution level is affected by the filter fre-
quency selected.
Filter ADC Voltage Current
Frequency Resolution Resolution Resolution
10 Hz 22.5 Bits 3 µV 3 NA
50 Hz 20 Bits 19 µV 19 NA
60 Hz 20 Bits 19 µV 19 NA
1K Hz 10.5 Bits 14 mV 14 µA
The resolution levels for the voltage mode and current mode apply to the
full scale input ranges.
System accuracy is the total error between an actual input signal level
and the module output data value. System accuracy is effected by
external wiring, signal noise, filter frequency, calibration, temperature, and
output data formats. The table below lists that system accuracy verses
temperature for a 10hz filter with periodic calibration enabled.