Automation System
A process controller:

can solve a PID process control equation easily
is useful in a continuous process control application
None of these
can interface to digital and analog I/O
All of these

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Automation System
A stepping motor;

None of these
has a speed proportional to voltage input
has a commutator
is a good choice where continuous rotation is needed
can index positional movement.

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Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

do not leave training manuals unsecured
Verify the reputation of the people installing your system
run regular simulated tests using TARP (testing of Applications Recovery Planes)
None of these
do not allow unbonded service people to work on your equipment

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