Spectrum Controls 140 ACI 052 00sc - Manual (Page 53)

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 frequency 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.
Temp Voltage Mode Current Mode
25°C Typical ±0.03% ±6 mV ±0.05% ±10µA
60°C Max ±0.5% ±10mV ±010% ± 20µA
☞ Note: Accuracy calculations are based on the full scale current and voltage input range.
These are 0 to 20 mA and ±10V respectively.
47
Installation Instructions
32-Channel Analog Input Module
Quantum 140 ACI 052 00sc