Author Topic: Basic Sematic For Connecting Contactor/Motor Starter  (Read 5078 times)

ScottC

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Basic Sematic For Connecting Contactor/Motor Starter
« on: June 04, 2016, 02:02:50 PM »
I am not familure with the function of a motor starter/contactor you offer for sale.  I am try to connect up a E300-2S0022l VFD to a spindle motor.
Is there in any schematics and basic operation information available on wiring up the motor starter/contactor properly?  Again i am new to this kind of thing and i want to make sure i wire the input side right.

Scott


Steve Stallings

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Re: Basic Sematic For Connecting Contactor/Motor Starter
« Reply #1 on: June 04, 2016, 04:11:07 PM »
The contactor that PMDX sells is typically used as the mains power switch
device for the spindle and axis drives of large machines. It may also be
used to switch a spindle motor on and off when a VFD is not used. There
is no reason to use a contactor between a VFD and the spindle. Indeed
some older VFDs may be harmed by doing this. The VFD has control terminals
that are activated by light duty contacts or the outputs of a spindle control
such as the PMDX-107 or PMDX-407.

An example of using a contactor as a mains power switch together with a
"charge pump" safety circuit is shown here:

http://www.pmdx.com/Doc/AN003_MachinePower_03.pdf

This example is for a PMDX-125/126 running from a parallel port. The
"charge pump" is used to prevent errant operation of the parallel port
during  power up of the PC from activating the machine. There is no need
for a "charge pump" with intelligent controls such as our SmartBOB, but
they still offer such a signal because they are often used with older breakout
boards that still require a "charge pump" signal.
Steve Stallings
www.PMDX.com

ScottC

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Re: Basic Sematic For Connecting Contactor/Motor Starter
« Reply #2 on: June 06, 2016, 02:37:58 PM »
Steve,

Is there data sheet i can review or a part number i can get to look up on the 250 volt unit you are selling.  My application is for 220 volts AC.

Scott

Steve Stallings

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Steve Stallings
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