It's a DE9. DB is the 25 pin size used for the large serial port, parallel ports, and old Macintosh SCSI.
A is 15 pin, used mainly for PC gameports and old Macintosh monitors. C is 37 pin, most commonly used for old PC external floppy drives. D is a three row 50 pin connector, uncommonly used for SCSI. Centronics 50 was far more common. Then for some reason they went down to 9 pins for E rather than logically having it as A then going up in number from there. Apple's 19 pin D-subminiature connector they used for Apple ][ and old Macintosh external floppies never got assigned a letter. There was also something it was used for on some 1990's music synthesizers. Having long gone out of production, Big Mess O Wires (who makes floppy emulation devices for old Macs and Apples) had a Chinese company make a big supply of new ones, and IIRC Digikey went in on the order so they could have a stock. So at one point the BMOW guy had the world's entire supply of new D-Sub 19 pin connectors on his back porch, before shipping Digikey's portion off to them. On Monday, April 11, 2022, 01:49:22 AM MDT, Danny Miller <dan...@austin.rr.com> wrote: OK, I tried putty with 2 & 3 tied together and it loops back and shows keystrokes while tied. So the NUC's RS232 port IS functional. I found an FTDI USB RS232 but it ends in female pins, I need male. Found a knockoff PL2303 USB-to-DB9 cable, I hope it's RS232 level, it does end in a DB9. No luck there either. Same "Modbus timed out" error. There is an isolated RS232-Modbus bridge there in between. I know it works because it's fine with the existing Dell and 2.7. I did speculate if the electrical signal levels are somehow different it might not work on the new machine, but that doesn't make much sense. I guess I need to bring the oscilloscope out- if the baud rate is wrong, that would do it, but I don't see how 2.8 would change that. Same code. But I'm running out of other things to check. Danny _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
