If the contact symbol on a PLC ladder logic rung is an examine on, then
A) the field device must be a NO type of contact.
B) the field device must be a NC type of contact.
C) power flows in the contact if the input pin associated with the examine on contact has zero volts present.
D) power flows in the examine on contact if the field device is a NO contact and the contacts are in their normal position.
E) None of the above
E
You might also like to view...
Describe the use of electricity as an operating source for HVACs.
What will be an ideal response?
Read the setting on this metric micrometer scale graduated in 0.01 mm.
Fill in the blank(s) with the appropriate word(s).
Which field of an EPC identifies the manufacturer of the product?
A. Header B. Domain Manager C. Object Class D. Serial Number
What is the best temperature to store a battery at?
A. 80°F to 90°F (26.6°C to 32.2°C) B. 70°F to 80°F (21.1°C to 26.6°C) C. 50°F to 60°F (10°C to 15.5°C) D. 30°F to 40°F (-1.1°C to 4.4°C)