ET420 PLC, relay logic controller

1.Explain the following in detail:

a.What is relay logic?

b.What is a ladder logic diagram?

c.What is the meaning of a rung in PLC?

2.Explain in detail how PLCs work.

3.

4.Assume a thermocouple, which supplies the input to an analog input module, generates a linear voltage from 20 to 50 mV when the temperature changes from 750 to 1250°F. How much voltage will be generated when the temperature of the thermocouple is at 1000°F?

5.Create a 5 digit code using the SLC 500 rack/slot-based addressing format for each of the following:

a.A lamp connected to terminal 3 of module group 0 located on rack 2. (5 points)

b.A pushbutton connected to terminal 5 of module group 2 located on rack 1. (5 points)