Eaton Electrical D77A - Manual (Page 34)

Intelligent Technologies ( IT.) D77A I/O Module Products
26 For more information visit: www.EatonElectrical.com MN05002001E
Analog Output Modules
Figure 21 illustrates the basic signal processing operation. Digital data from external sources are extracted from the QCPort and
transferred to the controller’s central processor unit (CPU). The digital data from the CPU is transferred to the digital-to-analog
converters (DAC). The DAC system converts the digital values to linear signals and provides them to the output terminals.
Figure 21: Analog Output Module Operation
V0
I0
QC Port CPU DAC
SCHEM-002
V1
I1
DAC
P.S.
C0
C1
+24V
G