Van's Air Force
Don't miss anything! Register now for full access to the definitive RV support community.
Can a GEA24 provide power to sensor?
- Thread starter N411TW
- Start date
rapid_ascent
Well Known Member
There are some +12V pins on J243 which can supply power. Its probably best for you to look at the G3X installation manual to see how much current they can supply versus your required current.
rocketman1988
Well Known Member
Power
Most of those pins have a very low current limit. I was not able to power my Princeton fuel sensors with those pins and had to run a separate power circuit.
Most of those pins have a very low current limit. I was not able to power my Princeton fuel sensors with those pins and had to run a separate power circuit.
From the G3X installation manual: (revision AU)
You may have to contact UMA to get a maximum current specification for the 1EM2K sensor, since it doesn't seem to be listed amongst the various spec sheets on their website.
You may have to contact UMA to get a maximum current specification for the 1EM2K sensor, since it doesn't seem to be listed amongst the various spec sheets on their website.
Desert Rat
Well Known Member
It depends on how much amperage your pressure sensor draws. This is from teh G3X manual:
The GEA 24 supplies output power for engine/airframe sensors that may require supply voltage excitation. The GEA 24 outputs voltage levels of +5 and +12 Vdc. Each output can supply a maximum of 50 mA. If more than 50 mA is needed for a sensor, 3 outputs of the same voltage may be spliced together to allow an output current of up to 100 mA.
The GEA 24 supplies output power for engine/airframe sensors that may require supply voltage excitation. The GEA 24 outputs voltage levels of +5 and +12 Vdc. Each output can supply a maximum of 50 mA. If more than 50 mA is needed for a sensor, 3 outputs of the same voltage may be spliced together to allow an output current of up to 100 mA.
Yes it will work. Max current draw 10 mA.
https://umainstruments.com/wp-content/uploads/2021/04/specT-EU-RevJ.pdf
Good luck
https://umainstruments.com/wp-content/uploads/2021/04/specT-EU-RevJ.pdf
Good luck
I may have missed it - where in this document does it state that it applies to the 1EM2K sensor?
rapid_ascent
Well Known Member
It does show 10mA over on the left under specifications.
Yes, that's not in question. What I am questioning is whether this document applies to the 1EM2K sensor at all, since it is from a different series than the TxEU sensors this document applies to.
The current requirement for the UMA 1EM2K sensor may also be 10 mA, but I don't believe that there is any publicly available documentation to support this. Hence why I suggest contacting the manufacturer to find out.
rapid_ascent
Well Known Member
Ahhh, I see.
rapid_ascent
Well Known Member
Well one possibility is to just hook the sensor up to a bench supply and measure the current. I'm not sure how these devices operate so I'm not sure if the current varies. If however you were to measure 10 mA you are probably pretty safe. If you measure 40mA then probably not.
I'm not sure how the current is limited on the GEA power outputs. They may or may not have some type of poly switch type (resetable) fuses on each output. Which would mean that the GEA outputs are protected. Maybe someone here knows if that is the case. If that were indeed the case you would be pretty safe in trying to hook the sensor up to the GEA.
I'm not sure how the current is limited on the GEA power outputs. They may or may not have some type of poly switch type (resetable) fuses on each output. Which would mean that the GEA outputs are protected. Maybe someone here knows if that is the case. If that were indeed the case you would be pretty safe in trying to hook the sensor up to the GEA.
