If you needed to connect a 4-20 mA pressure sensor to a PLC, you would use a(n) ____.
A) analog input module
B) analog output module
C) digital input module
D) digital output module

Question

Quizplus · Accepted Answer

A 4-20 mA pressure sensor is an analog device, and therefore requires an analog input module to convert the analog signal into a digital signal that the PLC can process. An analog output module is used to output an analog signal from the PLC to a control device, a digital input module is used to read digital signals from devices such as limit switches, and a digital output module is used to control digital devices such as solenoid valves.

If You Needed to Connect a 4-20 MA Pressure Sensor