Panasonic MSD043Axxx Servo Driver pin outs????

[JAZZCNC]

Picture no 2 in the very first post

"Hi, I have three Panasonic MSD043xx servos on a Triac" - then picture two is labelled "MSD043xx" in large red writing.

I know the drive model, I referring to showing us the rear of the cable connector you have because you say the 3rd diagram doesn't match, so what do you have.? plus those pictures were a bit shit so can't see the connector on the drive very well.

Just because the front of the connector shows two rows of pins doesn't mean the rear of the connector has 2 rows, in fact, many have 4 rows just like the diagram shows. See the pic of one of our Lichuan servo drive connectors to get the idea.

[Nemo1966]

I see what you are saying.. but if you look at the first diagram I posted there are only 36 connections on the Input/Output control cable CN-I/F.

I've counted inside the connecter and there and theres 36 connections (18 each side - not 19 and 17 as shown in my numbering...sorry). Then on the other end (connection to the AHHA board) is a 36 pin serial connector. Would they really use a 72 pin connector when they only used 36 of them?

Also the pin out picture you posted (from the manual) uses 4 rows of 9 pins (making 36 pins). Which is also just strange.... if there was more pins would they really only use the top half?

The whole thing would be so simple if they just had Pin 1, Pin18, pin 19 and 36 marked on the device. I posted hoping someone had fitted these type of drives before and would instantly know. It looks like one of situations where if you "know" you know, but if you don't... you don't and there no way to actually work it out.

I do appreciate your time and effort though, it's just very frustrating trying find out this info that should be readily available in the manual.

thanks again

[Nemo1966]

The connector looks like this https://www.ebay.com/itm/233770293586

Go through the pictures and you can see the front end of the 36p which shows 18pins each side.

[JAZZCNC]

I've counted inside the connecter and there and theres 36 connections (18 each side - not 19 and 17 as shown in my numbering...sorry). Then on the other end (connection to the AHHA board) is a 36 pin serial connector. Would they really use a 72 pin connector when they only used 36 of them?

Also the pin out picture you posted (from the manual) uses 4 rows of 9 pins (making 36 pins). Which is also just strange.... if there was more pins would they really only use the top half?

Yes, they would use a 72pin at the other end if that is what was needed on the board, this is not uncommon. My Yaskawa Spindle servo drive uses a 44-pin connector but only 6 of the pins are used.
Likewise, it's not uncommon on a 36pin connector to only use one row or less.

It's also not uncommon for 2 or 3 cables to go to one 36pin connector so they make use of the pins for several boards. We fit industrial controllers and they often come with connectors using several cables.

The connector looks like this https://www.ebay.com/itm/233770293586

Go through the pictures and you can see the front end of the 36p which shows 18pins each side.

Yes but look at the rear and there are 4 rows of pins although it shows a 26pin, not 36 they are just the same with more pins, and the diagram in the manual is shown as if you are viewing from the rear, not the front which is where I think you are possible getting confused.?

Do you have the cable connector.?

[Nemo1966]

and the diagram in the manual is shown as if you are viewing from the rear, not the front which is where I think you are possible getting confused.?

Ah yes I now see what you are saying, I have a cable already I wanted to know the pin numbering from the FRONT of the cable connector. I didn't realise that they looked different from the back.

The cables I have are the 4th pic in my original post. So I wanted to cut off the NON-Servo connector (36 pin serial) and trace back the signal with a multimeter and re-use them.

Looking from the back (like you say) then it does match what I thought on the servo 1 - 18 down the left side and 19 to 38 down the right side. Which will match the from of the FRONT of the servo.

thank you very much - sorry for not clicking sooner

[JAZZCNC]

thank you very much - sorry for not clicking sooner

No problem, Servo manuals are not the clearest of things, and if you are not used to these things it's not always obvious. The good thing is your sorted now.