Reply with QuoteFor future reference. The negative bus on the backplane is the outer trace.
Hooked up my new 5VDC power supply and she works.
LeBlond Makino FNC-128 PLC information
Shop I work for has an FNC-128 with Fanuc 6MB control and what Makino was calling an 'UM15A cpu' for handling PLC related stuff.
Today the 5 volt power supply for the UM15A died and unfortunately I didn't check to see if the wires were labeled before ripping it apart so I have a 50/50 chance of getting the polarity right when the new power supply comes in. It seems like I have an incomplete electrical drawing for the machine, plus there's a whole lot of undocumented stuff that happened in the electrical cabinet over the years.
I tried looking for anything from Fuji who has their name on the circuit boards for this PLC and can't find anything.
Anyway the 5 volt wires go to the backplane on two wide traces that wrap around the outside in a C shape
Attached is a picture of the lower portion of the backplane. The two wider traces you see on the bottom. I could assume the outside trace is the (-) bus, but I'd like to try to make absolute certain of this.
So, does anyone know the polarity, or would anyone know where I could find out a little more about this PLC?
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Re: LeBlond Makino FNC-128 PLC information
For future reference. The negative bus on the backplane is the outer trace.
Hooked up my new 5VDC power supply and she works.
