Električki odvojiti upravljačke ormariće kada je jedan od njih ugašen

[frnhr]

• nabaviti MOSFet-e
• složiti proto PCB
• prekinuti kontakt kada je ugašen ormarić teleskopa
• prekinuti kontakt kada je ugašen ormarić kupole

[frnhr]

Will try it with two arrays of low-resistance MOSFETs (is there such a thing as high-resistance MOSFET?)

Waiting for the parts to arrive via mail...

[frnhr]

Power to the mosfet arrays must come via main power switches, which is doable in dome enclosure, but not doable in telescope enclosure because it breaks a 3-phase power line, and there are only 3 poles in the switch.

[frnhr]

• check if power switch on telescop logic enclosure door really has only 3 poles
  Checked, it has only 3 poles.
• Need a rotary switch with 4 poles.

Considerations:

• should not be possible to accidentally disconnect the power (switch is under the table)
• Ideally it should match existing hole (measure it)
• It is possible to combine the two existing switches into one 3-position switch.
• Wires and terminals should be completely covered - this switch is always live, and in a position that can be accidentally touched while working in the enclosure.
• This is not an Emergency stop switch, so if possible it should not be yellow-red

Extra pole will be used to power the mosfets' gates. This is the only way we can "detect" enclosure is not being powered from the other enclosure via cable I.