Machsupport Forum
Third party software and hardware support forums. => Third party software and hardware support forums. => Topic started by: Jacob_Blank on July 06, 2026, 10:29:16 AM
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Howdy,
I am using a light post to indicate the status of the machine. I've most of the lights down, but for the e-stop indicator and can't figure an elegant way to get it to work.
I am using a C25XP breakout board with an M26 expansion board. The expansion board is controlling the lights currently, allowing me to control them without a relay for each one. The breakout board has a pair of ports dedicated to the e-stop, if the connection between those ports is open, the board stops all output signals.
My original concept was to use the e-stop being activated (opening the connection on the e-stop port) to indicate to Mach4 (which is does) and then Mach4 to automatically turn the light on to indicate the e-stop status. However, as said, it seems that all output signals are stopped when the e-stop is activated. I feel like I'm overlooking something in the documentation for the board or maybe an obvious way about it.
Does anyone know if the C25XP has a port that can be used when the board is e-stopped? Am I approaching the problem wrong?
Thank you for your time,
Jacob
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Hi,
Its unlikely that the break out board will allow you to control an output during Estop like you want.
The usual solution is to use a single pole, double through relay. Use the Normally closed output to power the red lamp. Then configure an output to be an enable output. This output is used to turn on the relay. This opens the normally closed terminal, breaking the power to the lamp. When the system is in Estop, the relay output is de-activated, turning on the lamp.
I hope this helps.
Peter
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Good evening Peter,
Thank you for confirming my suspicions. That makes perfect sense and I admit I ought have just gone with that from jump.
I appreciate your help, good sir!
Respectfully,
Jacob