If the contact on a PLC ladder logic rung is an examine off type, then
A) the field device must be a NO type of contact.
B) power flows in the contact if the input pin associated with the examine off contact has zero volts present.
C) the field device must be a NC type of contact.
D) power flows in the examine off contact if the field device is a NC contact type and the contacts are in their normal position.
E) None of the above
B
You might also like to view...
If the applied voltage is too high, the motor may develop local hot spots within its windings, but it will not always experience ____________________.
Fill in the blank(s) with the appropriate word(s).
In history, the first method of food preservation was probably ____________________
Fill in the blank(s) with correct word
Two technicians are discussing master cylinders. Technician A says that it is normal to see fluid movement in the reservoir when the brake pedal is depressed. Technician B says a defective master cylinder can cause the brake pedal to slowly sink to the floor when depressed. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
HID headlights use a(an) ________ instead of a bulb
A) Arc tube B) Wire winding C) Troxler tube D) Exposed filament