[cctalk] Fanuc A860-0056-T020 : 24 V supplies

Bill A few years ago I took your advice on interfacing a Fanuc tape reader without reels, it has happily read tapes to its host since then. The interface card was the common A20B-007-0750/07B, with 24V, 5V & Gnd on CNT3, and IO signals on CNT1. Notably the 24V currents can be high, eg 1A2 when in auto. I now have a Fanuc A860-0056-T020 tape reader with reels on the bench and know that several years ago you used the same model. Two specific questions: - does the CNT1 connector harbour any surprises ? I presume at worst it is a superset of the A20B-007-0750/07B CNT1 interface - how did you feed 24V into the beastie o via CNT1 p23 and p24 ? ie on two ribbon cable cores o I note that TP2 provides 5V/Gnd terminals, but 24V has no terminals ? The Fanuc 6T "manual", helpfully available on your web site, indicates (Fig 3.6a) that the tape readers (with/out reels) are fed 24V and 5V over the ribbon cable. And, that the with reels motors run at 100V. I would be very grateful for an indication of how you implemented the power hook up and intimation of the currents / power levels to be expected. Hopefully, knowledge will keep the magic smoke inside the system. Best Regards Martin