, What is a programmable logic controller(PLC)? - ANSWERAn industrial grade computer
that is capable of being programmed to perform control functions.
Which of the following is not an advantage PLC offers over conventional relay-based
control systems? - ANSWERAbility to Control High Voltage/Current Directly
A(n) _____ architecture design allows the system to be easily connected to devices and
programs from other manufacturers. A(n) _____ architecture makes connecting devices
from different manufacturers more challenging - ANSWERopen | proprietary
Inputs and Outputs (I/O) are integrated into the PLC in either _____. - ANSWERfixed or
modular configurations
When I/O is modular, it slots into the _____. It connects to the backplane allowing the
CPU to communicate with the modules. - ANSWERRack or chassis
Which of the following is a function of the Processor Module or CPU? -
ANSWERExecutes the stored user program from memory.
Sends appropriate output commands to control devices.
Accepts input data from sensing devices.
Which of the following describes the function of I/O modules? - ANSWERForms the
interface between the CPU and the field devices
Which of the following is not powered by the Power Supply? - ANSWERField device
What are the two most common types of PLC programming devices? - ANSWERLaptop
and personal computers
Which of the programming languages below is the most common (often considered
standard) language used in PLC? - ANSWERLadder logic
What is a Rack as defined by Siemens? - ANSWERA device that accommodates the
modules and connects them to each other.
What is the function of a power supply? - ANSWERprovides the power to the CPU and
the internal circuitry of connected modules.
What type of module adapts the signals from field devices to the internal signal level? -
ANSWERSignal modules