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Key terms:
plc
programming
logic
input
programmable
output
signals
relay
analog
processor
automation
ladder
modules
ladder logic
control system
switch
desktop
valve
programmable logic controller
control panel
programming languages
discrete
process control
electromechanical
distributed control system
sequential
analog signals
sensor
graphical
modular
desktop computer
water level
bedford
personal computer
rack
proprietary
screens
boolean
buttons
motion control
user interface
iec
hundreds or thousands
integer
protocols
siemens
customized
timer
operating systems
programmed using
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