M
Marc Sinclair
> > I suppose that your NC contact is electromechanical, if this is the
> > situation you could replace it for a solid state NC contact and forget any
> > type of vibration.
You can forget safety and standards compliance too.
> > However the idea to put two contact blocks in parallel is
> > convincing.
If the switch can fail NC one time in a million, putting two in parallel makes the chance of failure one in half a million, surely a degradation in safety
> > Another simple means we follow is to wire two such switch contacts in
series.
> > The operator has to press both these switches simultaneously in the
event of
> > Emergency.
I'm horrified, Safety is the issue here, peoples safety. This setup would not be allowed in Europe. the regulations specify that there should be no ambiguity in emergency stops. You should work harder to find a solution that does not degrade safety.
<moral> If this is to be an automated world it is our job to make it safe. If people are injured or killed by machinery and robots then trust in
automation will diminish. </ moral>
marc sinclair
> > situation you could replace it for a solid state NC contact and forget any
> > type of vibration.
You can forget safety and standards compliance too.
> > However the idea to put two contact blocks in parallel is
> > convincing.
If the switch can fail NC one time in a million, putting two in parallel makes the chance of failure one in half a million, surely a degradation in safety
> > Another simple means we follow is to wire two such switch contacts in
series.
> > The operator has to press both these switches simultaneously in the
event of
> > Emergency.
I'm horrified, Safety is the issue here, peoples safety. This setup would not be allowed in Europe. the regulations specify that there should be no ambiguity in emergency stops. You should work harder to find a solution that does not degrade safety.
<moral> If this is to be an automated world it is our job to make it safe. If people are injured or killed by machinery and robots then trust in
automation will diminish. </ moral>
marc sinclair