EXT Project Engineer Interview Questions and Answers

A wiring diagram shows the connections between components in a transmitter.

• 2-wire transmitters have power and signal wires combined into a single pair

• 3-wire transmitters have separate power, signal, and ground wires

• 4-wire transmitters have separate power, signal, and ground wires, plus an additional shield wire for noise protection

HMI stands for Human Machine Interface and is a user interface that allows interaction between humans and machines. SCADA stands for Supervisory Control and Data Acquisition and is a system used to monitor and control industrial processes.

• HMI is typically used for local control and monitoring of machines or processes.

• SCADA is used for remote monitoring and control of multiple machines or processes.

• HMI usually has a graphical interface with buttons, switches, and indicators fo...read more