Proximity wiring for limit switches, safety relay and a contactor

[john swift]

just had a look at the 2DM860H and the power supply terminals are marked as AC input
(the 2DM860 appears to be a version of the 2DM860H with a DC supply input )

your diagram shows the power supply as a DC supply

check the relay can break the DC supply current

otherwise you may find the DC current either burns the contacts due to the arc jumping across the contacts or welds them closed

( the arc when a switch breaks an AC current will be extinguished as the mains voltage drops to zero 100 times per second )

usually switching the DC supply to a stepper driver it is not recommended your likely to damage the driver(s)
I expect the drivers with an AC supply input will have a smoothing capacitor after the bridge rectifier that's large enough to absorb the back EMF when a DC supply is disconnected



John