Would like to have detailed instructions/drawings of proper wiring of
Start/Stop stations for multiple motors of single phase and three
phase AC 120V, 240V, 480V for applications such as conveyors.

Also, using a start/stop station as a jogging station, that has
multiple start/stop stations, once the
conveyor has been started.

Hello Motorhead:

First I would like to point out a few things about motor controllers.
Then specifically address your questions

1.	A Motor Starter in basically a magnetic switch. The control voltage
(typically 12V, 24V, or 120V) energizes a coil that magnetically
forces a core attached to a set of contacts to open or close. These
contacts are used to control the motor. There are typically two other
sets of contacts, one for the control circuit and one auxiliary (for
an indicator light or other use).

2.	Pressing the start switch (a normally open momentary switch; only
closed while being pressed) closes the contacts by energizing the
coil. The control circuit runs through ‘control contacts’ on the Motor
Starter bypassing the start switch. This keeps the coil energized
after the start switch is released (until the circuit is broken).

3.	Pressing the stop switch (a normally closed non-momentary switch;
opens when pressed and remains open until pulled out) breaks the
control circuit energizing the coil opening the motor contacts.

4.	A jogging or ‘plugging’ switch is similar to the start switch (a
normally open momentary switch; only closed while being pressed),
however it is isolated from the control circuit by a relay and does
not continue to energize the coil after being released. (See page 26
of the Allen-Bradley ‘Typical Wiring Diagrams’
http://www.ab.com/manuals/ms/GI-2.0.pdf )


 
Question1: Would like to have detailed instructions/drawings of proper
wiring of
Start/Stop stations

Answer:

This site shows some very basic wiring diagrams excluding jogging
http://www.pljohnson.com/electrical/motorsandcntl/controls/mtrstrtrconndiag.shtml

This document from Siemens is an excellent resource for motor
controller and wiring diagram basics excluding jogging.
http://www.sea.siemens.com/step/pdfs/cc_1.pdf

This document from Allen-Bradley should address all of you concerns.
http://www.ab.com/manuals/ms/GI-2.0.pdf

Question 2: Using “multiple motors of single phase and three phase AC
120V, 240V, 480V for applications such as conveyors.”

Answer: A Motor Starter’s control circuit and motor contacts are
separated (electrical isolated), allowing a single control circuit to
operate many motor controllers.
 
Question 3: “…using a start/stop station as a jogging station, that
has multiple start/stop stations, once the conveyor has been started.

Answer: 

(Please reference the last diagram on this page for basic multiple
Motor Starter wiring -
http://www.pljohnson.com/electrical/motorsandcntl/controls/mtrstrtrconndiag.shtml)

Assuming the control circuit runs through all of the Motor Starters,
one or more of them may be equipped with a jogging function that
controls all of the motors. However, jogging temporarily ‘starts’ the
motors and your question suggests that you want to temporarily stop
them. Using a normally closed momentary switch - only open while being
pressed, can do this.

CAUTION: when using multiple stations it is imperative to have a
system wide EMO – Emergency Machine Off – that requires resetting at
each station before resuming operation.

If there is anything further to make this a five star answer please
ask me to clarify the content.

Motor on!

Waldo

Hello motorhead,

I have found a few 'quasi' references and diagrams for you. I could
not find anything with your exact specs, but it should be a good
starting point. Here is what I got:

Three Wire Stop-Start Station Wiring Diagram:
http://dirkstubbs.com/eleccalc/diagrams/3w_stop_start_dv.htm

Two Three-Wire Stop-Start Stations Wiring Diagram :
http://dirkstubbs.com/eleccalc/diagrams/3w_stop_start_dv_2stat.htm

The guy that runs the site says says you can contact him for help with
more diagrams and schematics. These simple schematics though should
show enough to where you could interpret and build off of.

Hope this helps a bit-

sgtcory

P.S.
I found them via Altavista with a search for:
start stop station wiring

You need 'contactors' or 'starters' to switch the motor load off and
on. Usually the control circuit will consist of a hand off auto switch
with a contactor and a control power transformer.

This is the first time I have been on here so if you want me to
'answer' your question let me know. I would send you a faxed drawing
of one basic motor control circuit. Thanks