Strostkovy
Titanium
- Joined
- Oct 29, 2017
I've started designing my projects more modular so that machines are more of a work cell than an actual discrete machine. However I do not trust the serial interfaces to handle anything safety related.
So I've come up with a system of TRS jacks wired so the contacts plugged into them are all in series, and the outputs are all in parallel (but diode or relay isolated). So I can unplug a dummy jack from the safety plugboard and connect in a e stop witch or a limit switch or whatever as I see fit.
Is there a standard cable color for this? I know yellow/red is the recommended color scheme but I can't get any yellow/red cable cheaply. I thought about solid yellow but that's used for systems that stay live when machinery is in emergency stop. Red seems like the next obvious choice. Is it reserved for anything? This isn't a code application but I try to match up to whatever standards I can.
Also, there is another soft safety that works in the same way, but only trips into E-stop if activated while a work cycles is active. This is mostly for work gates and locking out anything without a hard reboot sequence. What color should these be?
So I've come up with a system of TRS jacks wired so the contacts plugged into them are all in series, and the outputs are all in parallel (but diode or relay isolated). So I can unplug a dummy jack from the safety plugboard and connect in a e stop witch or a limit switch or whatever as I see fit.
Is there a standard cable color for this? I know yellow/red is the recommended color scheme but I can't get any yellow/red cable cheaply. I thought about solid yellow but that's used for systems that stay live when machinery is in emergency stop. Red seems like the next obvious choice. Is it reserved for anything? This isn't a code application but I try to match up to whatever standards I can.
Also, there is another soft safety that works in the same way, but only trips into E-stop if activated while a work cycles is active. This is mostly for work gates and locking out anything without a hard reboot sequence. What color should these be?