Obsolete PLC Hardware

PLC hardware is an integral part of industrial manufacturing today. Programmable logic hardware has revolutionized the way we make just about everything in an industrial environment. When it is programmed and operating properly, the PLC will provide us with very efficient machinery control. When we experience a hardware failure, the PLC can leave us helpless in a costly situation on the shop floor. However, obsolete PLC hardware open up a new page in the book of down-time.

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PLC Hardware Troubleshooting

Fortunately, plc hardware problems can be fairly simple to diagnose, sometimes the bigger issue is finding a drop-in replacement for an obsolete plc in an environment where ever-changing technology and design can phase out, or completely eliminate models from the available parts catalog annually.

For ease of use, accessibility, and available plc hardware, we've been referring individuals to eBay. It almost seems too easy but we've found many parts available that we thought we'd never find. Even after checking with larger parts houses, we still come back and check here regularly. It is not unusual to find obsolete Allen Bradley plc's as well as many other brands including Mitsubishi, Koyo, Fuji, Siemens, Square D, and many other brands of plc hardware listed every day.

These parts are those that were posted as a result of hard times at other companies and in many cases are NOS (new old stock).

Machine downtime due to an obsolete PLC hardware is a reality for many. There are options, however, nothing is ever easy. Here is a systematic approach, a simple yet effective method in dealing with a failed component that has likely been phased out by the manufacturer and no longer readily available.

1. Identify your problem... Making a positive identification of the failed component is the crucial first step. Troubleshooting is not a synonym for guess-work. It is a scientific method of determining a problem. There should be no doubt as to the source of the problem. This is determined through testing and not guessing.

2. Check the shelf... That's right, all too many times has a spare component or unit been passed over and found a day late. It sounds simple, but it is always the next step. Don't go looking for something that doesn't need to be found.

3. Check with the manufacturer... A website visit, email, or quick phone call to inquire about a a drop-in replacement is common sense. This step will deliver the bad news if obsolescence is indeed the case.

4. Check eBay... Believe it or not, this has become somewhat of a flea market for old industrial parts. By many, it is still considered to be a website for collectibles and the like, but a quick search can actually reveal a different side to the 'bay. Many private sellers post industrial components as a buy it now type listing, therefore bypassing the auction format all together.

Take a moment and browse the eBay listings since they are always changing...

5. No positive results? explore other options... If your particular PLC hardware is ultimately deemed obsolete and unavailable, you'll need to take the next path of least resistance. This may be upgrade or update your equipment with newer components. The good news is that your machinery or industrial equipment will most likely not need complete re-engineering or a top-to-bottom overhaul to accomodate new components. Adjustments to your system are possible when there is no other choice.

Search for Used PLC Hardware

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• Used Square D PLC
• Telemecanique PLC
• Used Bosch PLC
• Used Gould PLC
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Search for Low Cost PLC Hardware

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Our maintenance forum is jam packed with troubleshooting questions and answer, historical data, and general conversation on almost any topic . Forums are broken down into the maintenance saloon, troubleshooting 101, electrical and electronics, mechanical issues, and the classified ads.SMF file version (2.1.2) does not match SMF database version (2.1.4).
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Search the Classifieds

We also offer free industrial classified ad system complete with a category designed for want ads. We strongly encourage those with individual parts for sale, specifically new or vintage PLC hardware, to list them at OI. Ad creation takes only a few minutes and is free of charge.

Those requiring an odd-ball part or obsolete component can place a want ad just as easily, again, with no fees associated with ads. The OI ad system is at your disposal... Place a want ad, list your individual parts for sale, or post a listing for your company here.

About Us

We are a technology based organization. All information regarding PLC hardware has been contributed by a community of industrialists. We do not warehouse parts and components, but provide a means for perspective buyers and sellers to achieve their goals.

We also posted a PLC hardware troubleshooting guide for those who need help diagnosing a problem.

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PLC Hardware Troubleshooting Tips | Search eBay for Used PLC Hardware | PLC Hardware in our Forum

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