ethernet switch power

[dhall_polo]

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]

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]

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]

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.


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.

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.

[Rob Hickman]

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.