riscy
Geotechnical
- Jul 22, 2007
- 22
I come across the equation P = Vo*Io / 4
(1) I have 24V and 200mA AC/DC PSU into Zone 2 sealed case (IP67) with electronics and barrier modules for sensors attached to pipes. This is 4.8W, but I come across a weird equation P = Uo * Io / 4, what are they?
(2) What kind of barrier to use between external AC/DC adaptor to the above box, how short the 110V main cable should be. It would be placed in the Zone 2 area (ie Dog House).
(1) I have 24V and 200mA AC/DC PSU into Zone 2 sealed case (IP67) with electronics and barrier modules for sensors attached to pipes. This is 4.8W, but I come across a weird equation P = Uo * Io / 4, what are they?
(2) What kind of barrier to use between external AC/DC adaptor to the above box, how short the 110V main cable should be. It would be placed in the Zone 2 area (ie Dog House).