Re: Limit Switch Installation

Limit switches are supposed to be wired to control inputs. If using
EMC they should go to the parallel port. If your motor control has
limit switch inputs and you want to use them they will also be logic
inputs. But if you use the inputs on the controllor and not EMC then
EMC will not know what is going on. Motor controlor inputs should be
used as a secondary fail safe only.

Logic inputs only take a few milliamps to trip usually at 5 volts.
EMC is configuarable for N.O. or N.C. inputs.

Wally K.



In CAD_CAM_EDM_DRO@egroups.com, jmw@c... wrote:

> Are limit switches typically wired in series (normally closed) in
> the (PMDC) axis motor power circuit.
>
> I would assume so with this type of motor since the switch should
> stop the motor in case all other safeguards (software, etc) fail.
>
> But a switch rated for 15AMPS 90VDC is going to be the size of a

shoe

> box? What up? Do people just run the cigarette-pack-sized switches
> (e.g. 24VDC 1AMP) and hope they don't trip em very often?
>
> Thanks.
>
> --Jack