Are there emergency stop buttons, with two circuits and key reset
For a safety application in a civilian nuclear application, we need an emergency stop button which will interrupt two independent circuits when pressed.
Two independent safety systems make current flow - a few mA - in respectively these two independent circuits.
Once pushed, both circuits remain open and current flow is interrupted. Resetting the button shall be done using a key.
No semiconductor is allowed inside the button, since the radiation fields prevent any usage of semiconductors. Passive components like resistances or capacitors are OK. Sensing logic is away from radiation fields.
Thank you for your kind answer.
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