The schematic diagram of Figure 2-6 is an example of how a PLC output module is connected to a) isolate the load from the controller. c) vary the speed of a motor. b) control a high resistance. d)...

The schematic diagram of Figure 2-6 is an example of how a PLC output module is connected to a) isolate the load from the controller. c) vary the speed of a motor. b) control a high resistance. d) control a high current load.

Which of the following devices can be used for switching the output of a discrete DC output module? a) Transistor c) Relay b) Triac d) Either a or c