On Sun, Mar 25, 2018 at 3:48 PM, Ethan Dicks <ethan.di...@gmail.com> wrote: > I went noodling around eBay and found a couple of types > > SN-921 (2.1mm barrel jack for +5V) > > https://upload.wikimedia.org/wikipedia/commons/7/74/Sgi_dialbox_sn-921_front.jpg > > DANAHER CONTROLS Dials DLS80-1022 (+5V over DE9 serial cable - has > special Y-cable for power injection) > > https://upload.wikimedia.org/wikipedia/commons/c/cd/SGI_dialbox_DLS80-1022_front.jpg > > I have worked with a number of devices that are powered by +5V via > their DE9. Routinely, that's done by not connecting Pin 9 (RI) from > the host and injecting +5V into the device on its Pin 9...
Not even close... http://yehar.com/blog/?p=3471 The (Seiko?) SN-921 can apparently be powered via DE9 or the 2.1mm jack next to it... 1. GND 2. SERIAL OUTPUT (±9 V) 3. SERIAL INPUT 4. POWER IN +5 V 5. POWER IN +5 V 6. NC 7. NC 8. GND 9. NC The Danaher Controls DLS80-1022 has a DIN-5 at the end of its Y-cable for input power. It's +5V and +/-12V (because it does not generate serial voltages internally), I now gather... 1. POWER IN +12 V 2. NC 3. POWER IN +5 V 4. GND 5. SERIAL OUTPUT (±12 V) 6. NC 7. SERIAL INPUT 8. NC 9. POWER IN -12 V Easy enough to feed, but good to know it's got an odd pin/power arrangement. Now I'm really looking forward to unboxing these next month! -ethan