Relay Circuit Questions - Job #10
Here are questions about this relay circuit. You may consult the
assignment text, diagram, picture, and lecture. You may also use a
dictionary, theory book, and code book as you feel necessary. This in intended
as a learning experience.
Questions
1. What is the electrical circuit description for the two sets of contacts
that are wired around the "F" pushbutton?
2. What function does the "F" normally closed CR coil normally
closed contact perform?
3. Can this relay circuit be in "F" run mode when the control
relay is energized?
4. Can this relay circuit be in "F" jog mode when the control
relay is energized?
5. What action is needed to have "R" jog mode?
6. If a set of CR N.C. contacts are wired between L1 and L2, what will be
the result when the relay circuit is first energized?
7. What type pushbutton is used in this diagram for the "F"
pushbutton?
8. What type pushbutton is used in this diagram for the "R"
pushbutton?
9. When power is applied properly, and the selector switch is in the jog
mode and the "F" relay coil will not run, what might be the problem?
10. When power is first applied, what will happen without operator action?
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