Clearpath wiring clarification

[JRD56]

I'm converting my mill from open loop steppers to Clearpath SDSK drives on the X&Y axis. I assume I have Acorn ver 4 as it has LEDs on the I/O. I'm currently using H6 to connect to the open loop steppers.

Should I be using drawing S14972 as a reference to convert to Clearpath? It shows using 5vdc and 100ohm resistors on the outputs.

Drawing S14885 shows using 24vdc and no resistors so is that for an earlier version of Acorn?

[eng199]

5VDC with 100ohm pull up resistors is the better configuration.

The choice does not depend on different versions of ACORN. The recommended wiring was changed when we learned that the 5V configuration is all around better.

[JRD56]

Thanks for the quick response

[JRD56]

Is there any reason I cannot run the individual ENABLE signals to the drives separately rather than combining them thru a NC ESTOP switch. I already have an ESTOP circuit that disconnects the raw DC power from the drives.

[ShawnM]

Is there any reason I cannot run the individual ENABLE signals to the drives separately rather than combining them thru a NC ESTOP switch. I already have an ESTOP circuit that disconnects the raw DC power from the drives.

No reason at all. I wire my Clearpath enables directly to the Acorn and like you are asking about and have drive power disconnect via the estop. The Centroid enable circuit doesn't make any sense to me anyway. All three tied to a single line means any of them will enable any drive. I've used 5V and 24V both with good results but the consensus seems to be 5v with the 100 ohm, 1/2 watt resistor for the Clearpath.

[JRD56]

Thanks Shawn. I typically do not like to rely on enable signals, etc for estops. Dropping the raw DC power thru a contactor is a more reliable in that you are not relying on a microprocessor in the event of an "emergency".