SCR
A) Breakover thyristor
Question 2
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
