Engine 2014: Electricity

1. A An electro-magnetic relay internal to the PLC used to execute the stop command when the normally closed, momentary contact stop p  shbutton switch (Inp  t 2) is depressed.
2. B An electro-magnetic relay internal to the PLC used to execute the stop command when the normally open, momentary contact stop pushbutton switch (Input 2) is depressed.
3. C Programmed bits of data stored in memory used to execute the stop command when the normally closed, momentary contact stop pushbutton switch (Inp  t 2) is depressed.
4. D Programmed bits of data stored in memory used to execute the stop command when the normally open, momentary contact stop pushbutton switch (Input 2) is depressed.

Tip: press A-D to answer