Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by fsck

  1. fsck

    Small PLC choice?

    It is hard to not sound unappreciative... but please try & include specific links to the most general of background pages on recommendations. Or terms to find same. Google is not yet able to read minds as to my needs/intent. I waded through a dozen links on the S7-1200 trying to find one NOT...
  2. fsck

    Small PLC choice?

    Sounds interesting Rant: They could learn from A-D about usability of web pages. I'm in a maze of twisty little web pages, all alike. XYZZY was no help at all. I'm seeking the basic stuph; what you need to get started, etc. I find everything but. [Can you guess the WX here turned hot and...
  3. fsck

    Small PLC choice?

    I've learned enough already that I should restate my requirements: a) Small PLC, i.e. inexpensive. b) Remoted I/O as well as ones at CPU, <10 I's & O's at each. c) DC Powered [It's controlling a backup power system, so...] d) No large one-time costs [i.e. programming sw license, etc] e)...
  4. fsck

    Small PLC choice?

    I like Ethernet! I'm off to read up on it. (While the DL-440 looks like it would work, it's ~10X the price of the ClickPLC and far more complex than I want or need.) It's clear the AC measuring is a luxury best met other ways; I can use phase monitors such as the...
  5. fsck

    230V 50Hz to 110V 60Hz

    I must disagree; we do not know enough to say that it won't smoke on 50 Hz. Is this a cell phone charger, or a lift truck's? 50 ma at 3 v; or 5000 amps at 48? Is it ferroresonant, or 500 khz switcher?
  6. fsck

    Small PLC choice?

    Thanks, but I'm astonished at an electronics firm with nothing but a printed catalog!
  7. fsck

    Small PLC choice?

    I'll go read up on the DL-405; I infer this is not a Click-PLC, however? The RS-232 is easy. It's what I was told re: comms programming that bothered me. Hmm, the -405 TFM makes mention of a DC-powered DL-440, a real plus. Lots of pictures of communications at the beginning. I find DirectNET...
  8. fsck

    Small PLC choice?

    Thanks but it looks like the ClickPLC is a dead end. There's no good way to have remote I/O. I can put a 2nd CPU at the other location, but the comms between them is convoluted, I'm told. So I must reopen my PLC search.... Grrr. (And one, much less 3, of the above would cost more than...
  9. fsck

    Need Solid State Switch for 120VDC Motor

    I concur that a suitable SSR on the AC would be a better approach. You could make mountains out of molehills, and build a IGFET-based DC "relay", but why create trouble?
  10. fsck

    Small PLC choice?

    I need to choose and deploy a simple PLC. It will have about 10 digital inputs and 10 digital outputs, split between two specific locations. The main & remote locations will be connected by 100baseT and RS-232, carried by some fiber converters we're using. It would be nice to also be able to...
  11. fsck

    230V 50Hz to 110V 60Hz

    A switcher would do better than a real transformer. A 60hz transformer will likely overheat on 50 Hz; maybe slightly, maybe destructively. Tell us more specifics on the charger.
  12. fsck

    OT: compact, high HP motor for BA kitchen blender.

    Compressed air motor from a big Harbor Freight air drill, maybe?
  13. fsck

    propane tank remote gauging

    I've not found a suitable remote propane tank level gauge. The propane tank industry seems to sell them with built-in cell phones, to call them; not very useful when you want a local readout....and there's no cellphone coverage. I do find <http://www.rochestergauges.com/Pages/PDFs/R3D.pdf> &...
  14. fsck

    Exploding MV motor weatherheads?

    Can you get a metallurgist to look at the remains? I know nothing of the field, but am regularly amazed when I read NTSB reports on aviation/rail events. They can tell where where why and how a landing gear strut failed, or the turbine blade first cracked, etc.
  15. fsck

    SDS and common neutral

    I sorta figured that out.
See more

Part and Inventory Search

Back
Top