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dhall_polo
02-09-2012, 09:46 PM
I need an ethernet switch because of 2 EFIS and WX. The power supply that comes with the switch is rated output at 5v, 1a.

Can I safely power the switch using DB15 pin 1? or the usb port?

Rob Hickman
02-10-2012, 12:13 PM
The DB-15 port is limited to .350 amps , place an amp meter in line with your switch and check it. You will not hurt the EFIS, it has a resettable fuse.

NoahF
02-11-2012, 12:58 PM
Rob, does this apply to the 4500 as well? Is that also internally fused at .35 amps? How is the fuse replaced or reset?

dhall_polo
02-12-2012, 09:06 AM
1) Picked up a small, cigarette-pack sized 5-port switch from Fry's for $20. The power supply was rated at 5V, 1A output.
2) Also from Fry's, I picked up this mini USB charger for $7. It is rated at 5V, 1A output. Perfect.
http://farm8.staticflickr.com/7066/6860896771_cb3d7c7a9a_m.jpg

3) Converted from cigarette socket to wire harness for permanent wiring in plane.

Disassembled the charger.
Discarded the springs and clips that provide contact points for the cig lighter.
Soldered wires to the 12V lead and to the top of the USB cage.
Put everything back together.

http://farm8.staticflickr.com/7060/6860895029_2e02eeea2d_m.jpghttp://farm8.staticflickr.com/7068/6860896337_286364a284_m.jpg

4) Spliced a USB cable with the power cord for the switch. Done. Works great. 12v in--->5.15V out. Even has a red LED to indicate it's hot. I'm running my home network off the 5-port switch for a few days using this assembly hooked up to a 12v power supply.
http://farm8.staticflickr.com/7037/6860895741_163a45441a_m.jpg

Rob Hickman
02-13-2012, 02:06 PM
The AF-4500 and AF-5000 units have a .350 amp poly fuse for the +5V output. The fuse will reset once the load is removed.