It's a 48v @ 73a switching supply. I wondered if anyone has had or used one of these for a 50v supply. Mine didn't come with any labels or pin outs. So I haven't figured out how to hook it up yet. Anyone have any ideas or advice or even a link somewhere. I spent an hour on Google, there are a lot for sale. But no info that I could find.
-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
IBM 21L2906
- Thread starter Crusher
- Start date
If you post a picture of the terminals I might be able to help you if they are labeled with some abbreviations. Many of these larger switching supplies have a remote sense line that monitors the voltage at the load. If these are not connected the supply will go into over voltage shutdown.
5 Photos
48V 112A Switching Power Supply PN 21L2906 73 Amps @ 48v 3500 Watts 200/380v IBM
I tried posting link from ebay but didn't work. None of the terminals are labeled. None. Probably take cover off so I can trace power leads for input and output. But still have to figure what was hooked up to parallel port. Maybe V adjust or sense. Not sure. Will try to get pic up this weekend. I paid $90 for it. It's almost 30 inches long. It's huge.
48V 112A Switching Power Supply PN 21L2906 73 Amps @ 48v 3500 Watts 200/380v IBM
I tried posting link from ebay but didn't work. None of the terminals are labeled. None. Probably take cover off so I can trace power leads for input and output. But still have to figure what was hooked up to parallel port. Maybe V adjust or sense. Not sure. Will try to get pic up this weekend. I paid $90 for it. It's almost 30 inches long. It's huge.
48V 112a Switching Power Supply PN 21L2906 73 Amps 48V 3500 Watts 200 380V IBM | eBay
Here is link. Has many pictures. You can see plug terminals in back. No labels though.
Here is link. Has many pictures. You can see plug terminals in back. No labels though.
I figured out input wiring (ground and single/3phase wiring). Has spade terminals so I can make connections inside. Looks like single phase is also fused before breaker. So it made it pretty simple to track down. I figured out where 48v comes out back. Pretty simple, luckily some capacitors between terminals and traced down with fluke. Looks like top of terminal strip comes off. Now / later will have to see if it fires right up, or if it needs a sense resistor or what not. As I progress, I will keep informed. The parallel port is what has me concerned. Fun times.
