Helping wiring up Iso for test bench

ArcadEd

Member
Joined
May 25, 2006
Messages
579
Reaction score
2
Location
Tucson, Arizona
I got an iso trans in the mail from a fellow klover (thanks Shawn) and I wanted some helping wiring it. This is just going to be on my test bench to run a monitor.

I am a bit confused on the wiring and the schematic on the front doesn't help my ignorance.

My guess is the black and white wires in the upper left are the in from a power cord, where the ground goes to the frame of ISO (currently an orange wire you see in the far upper right).

Then the wire blue/black wire marked 115v will go to the monitor, is just another black wire (from the daisy chain above) the second wire to the chasis?

Thanks. I can take better pics if need be.
 

Attachments

  • iso.jpg
    iso.jpg
    89.6 KB · Views: 38
..

My guess is the black and white wires in the upper left are the in from a power cord, where the ground goes to the frame of ISO (currently an orange wire you see in the far upper right).
Yes.

Then the wire blue/black wire marked 115v will go to the monitor, is just another black wire (from the daisy chain above) the second wire to the chasis?

You should have at least two wires that are marked as 115v. One wire won't get you much power. The ground should go to ground. On my test bench the ground is brown with a white stripe. But that doesn't mean yours is. You'll need to read the schematic. Or test with a DMM until you find which ones are power.

Check out Bob Roberts' AC Wiring page. If you plan on testing boards with this you'll want to add a switching power supply. You also should have a line filter on there before the transformer. Good luck!
 
Well, I can't read that label at all.

Find where to hook up 120 to the input and do so. Take my advice and wire up a 2-amp fuse inline of one the wires to the iso, and install a switch on the other wire so you can turn the monitor power on and off independently of the rest of the test bench.

Then start measuring the outputs until you find your 120 again. Then hook up a couple wires to that one and put a standard 2-pin male molex with female pins on it that fits the normal G07, K7000, etc chassis. Make sure you make these wires long enough to reach around the monitor (if you rotate it) or even reach a monitor installed in a cab if necessary. I have my wires at about 8 feet.

I keep my iso (with fuse and switch) mounted on a board and sitting on the floor under my bench. When I am working on a monitor, I can flip the switch with my foot while using both hands to take measurements, and can quickly shut it back off if I see a problem (like blowing fuses, burning parts, etc).

The next step is to build some molex adapters to connect between your 2-pin molex and other chassis that might use different molex sizes (like the 3-pin used one later WG chassis like the U2000)...
 
I got an iso trans in the mail from a fellow klover (thanks Shawn) and I wanted some helping wiring it. This is just going to be on my test bench to run a monitor.

I am a bit confused on the wiring and the schematic on the front doesn't help my ignorance.

My guess is the black and white wires in the upper left are the in from a power cord, where the ground goes to the frame of ISO (currently an orange wire you see in the far upper right).

Then the wire blue/black wire marked 115v will go to the monitor, is just another black wire (from the daisy chain above) the second wire to the chasis?

Thanks. I can take better pics if need be.

Can you get a better shot of the Label?

There should be an input side that should only have 2 wires, and an output side which could have any number of wires. If it's a 1:1 transformer, the output voltage should match the input voltage.

Some transformers are also Step Down transformers, so you might have 120V in, and a lower voltage out, so it's important that you read the label very carefully.
 
I keep my iso (with fuse and switch) mounted on a board and sitting on the floor under my bench. When I am working on a monitor, I can flip the switch with my foot while using both hands to take measurements, and can quickly shut it back off if I see a problem (like blowing fuses, burning parts, etc).

Oooh, brilliant! I'm moving my switch. My bench is an old desk, so I can put it right by my knee.
 
Thanks guys I got it figured out using the volt meter. I really appreciate the help as always :).

Now just need to get it mounted someplace nice. I like the under the bench idea.
 
Back
Top Bottom