ISA Certified Control Systems Technician (CCST) program
Certified Control System Technicians (CCSTs) calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables.
The function of an A/D converter in a PLC analog input card is to:
A. convert the input power from ac to dc.
B. convert the output power from dc to ac.
C. convert the input analog signal to digital format.
D. convert the output digital signal to analog format.