Lecture 2 From Page 58

Question 1

Input Current/Voltage Range(s)

Answer 1

These are the voltage or current signal ranges that an analog input module is designed to accept.

Question 2

Output Current/Voltage Range(s)

Answer 2

This specification defines the current or voltage signal
ranges that a particular analog output module is designed to output under program control

Question 3

Input Protection

Answer 3

Analog input circuits are usually protected against accidentally connecting a voltage that exceeds the specified input voltage range

Question 4

Resolution

Answer 4

The resolution specifies how accurately
an analog value can be represented digitally. This will determine the smallest measurable unit of current or voltage change that can be detected

Question 5

Input Impedance and Capacitance

Answer 5

For analog I/Os, these values must be matched to the external device connected to the module. Typical ratings are in the Megohm and Picofarad range

Question 6

Common-Mode Rejection -

Answer 6

Noise is generally caused by electromagnetic interference, radio frequency interference, and ground loops

Question 7

CPU is built into fixed PLCs while modular types typically use a

Answer 7

plug-in processor module

Question 8

CPU, controller, and processor are all terms used by

Answer 8

different manufacturers to denote the same module that performs basically the same functions

Question 9

A processor module can be divided into two sections:

Answer 9

the CPU section and the memory section

Question 10

The CPU executes the program,and the memory

Answer 10

stores the program along with other retrievable data.