hooking up HP-IL with a Thinkjet 2225D RS-232 printer


I was wondering if a cable exists to connect a HP 71B with HP-IL to a Thinkjet 2225D printer that uses serial RS-232 interface. If a cable does not exist, is there a wiring schemematic available to interface HP-IL with RS-232. I have a NOS Thinkjet 2225D new in the box I'd love to use to print out my HP 71B programs. Thanks for your time -=Rob=-



you will need the HP 82164A HP-IL/RS232 serial interface or a compatible device.




This Message was deleted. This empty message preserves the threading when a post with followup(s) is deleted. If all followups have been removed, the original poster may delete this post again to make this placeholder disappear.


There's also the FSI164A from Firmware Specialists, Inc. which is virtually 100% compatible with the HP82164A interface converter but has some additional nice features like larger buffers, two to eight channels instead of one, and possible battery operation.

There are others here who know the insides of HPIL far better than I; but since they have not jumped in yet, I will make a few comments. Not only is the signaling method different and incompatible, but HPIL is an extremely intelligent interface with a very sophisticated protocol, unlike RS-232 which, although it is still a good workhorse in industry even now 4 decades after its beginnings, is only a couple of small steps above dumb shift registers. The HPIL spec is very involved and is well beyond what a hobbyist can do with a microcontroller or a few logic ICs. HP used to sell kits with the custom ICs and pulse transformers and special connectors, but their nimwitt marketing people made some poor decisions and discontinued HPIL about 15 years ago.

HPIL is basically a serial implementation of IEEE-488 (HPIB) although it can iterface to a lot more devices at once. I have the 82169 HPIL-to-HPIB interface converter and have used it for controlling a lot of laboratory instrumentation with my HP-41 and HP-71, using the same HPIB commands that HP's desktop controllers used. It was mostly transparent, making it look like the IEEE-488 equipment was on the interface loop itself except that HPIL's autoaddressing could not be used on IEEE-488.

Anyway, it is definitely not the kind of thing where you can just make up a connector to interface to an RS-232 printer.

Possibly Related Threads…
Thread Author Replies Views Last Post
  How to move lexfiles from PC to 71 w/o HP-IL? Joe Horn 9 3,258 10-18-2013, 03:50 PM
Last Post: Christoph Giesselink
  HP 2225D+ RAM failure/replacement Luca 4 1,939 09-10-2013, 01:46 PM
Last Post: Luca
  Hand Held Products RS232 to HP-IL aj04062 11 3,455 08-31-2013, 07:12 PM
Last Post: Paul Berger (Canada)
  HP IL over wifi ... (ILPer & go71b) Olivier De Smet 12 4,102 08-20-2013, 05:44 AM
Last Post: Olivier De Smet
  How do you print a 'data' file on the HP 71B to the HP 2225B thinkjet? Geoff Quickfall 3 1,658 08-18-2013, 04:32 PM
Last Post: Geoff Quickfall
  Trouble with RS-232/HP-IL Interface (HP 82164A) Hans Holzach 9 3,212 01-08-2013, 01:52 AM
Last Post: Marcus von Cube, Germany
  HP thinkjet printer service manual Alan Sciacca 0 880 08-23-2012, 10:38 AM
Last Post: Alan Sciacca
  HP-IL beginners question John Abbott (S. Africa) 4 1,781 05-28-2012, 05:45 PM
Last Post: Geoff Quickfall
  HP-IL: Using 82162A Printer and PIL-Box in Same Loop Les Wright 12 3,673 05-17-2012, 11:58 PM
Last Post: Les Wright
  Return of the HP 50g RS-232 serial cables Eric Rechlin 3 1,520 03-09-2012, 06:16 PM
Last Post: Andres Capdevila

Forum Jump: