A Programmable Logic Controller (PLC) receives information from one or more inputs. This semiconductor control device processes the information based on a software program. Finally, it sends an output control signal. The microprocessor based control system performs functions such as timing, logic, sequencing and others. The PLC follows instructions from an operator-defined program.

These intelligent systems provide reliable, high-speed monitoring and control of processes in automated applications. In addition, they are easy to program and configure.

Once the program updates the output, the CPU starts over and the cycle repeats again. The cycle depends on the number of inputs, outputs, and size of the program, while the action will depend on the inputs coming from a variety of sensors.

The input sensors include components such as switches, proximity sensors, photoelectric sensors, pressure switches, level switches, encoders and temperature sensors, while the output devices include actuators, relays, switches, and many more.

PLCs rely on software programs that help them in making the necessary decisions. The PLCs are programmed through a variety of tools, which may differ in ease of use, appearance, and complexity. The most commonly used PLC programming language is Ladder Logic, a graphical software that uses common electrical symbols. Other languages include Function Block Diagram (FBD), Sequential Function Chart (SFC) and Structured Text (ST).

The programming is done on the device such as a computer or handheld device after which it is transferred to the PLC memory using a communication interface.

Selecting a suitable PLC that will address your current and future needs can be a challenge, especially with the large number of different PLCs on the market today. The available PLCs have varying capabilities, physical sizes, complexity, cost, power requirements, scalability and other parameters. Therefore, it is necessary to determine the correct programmable logic controller for your specific application. Special systems can be designed for use in harsh environments.

The Programmable Logic Controller has revolutionized and simplified controls in automation and industrial applications. PLCs are easy to install, wire, program and modify to suit changing application requirements. These control systems are usually available in a wide range of sizes that ensure finding exactly what you need for any application.

Temperatures are still mild enough that you likely aren’t thinking about the implications of snow and ice just yet, but now is actually the perfect time to start considering it, and deciding what you’re going to do about it when it hits.

A driveway heating system will help you with the inconvenience of shoveling snow and the safety concerns involved with walking on icy surfaces, but what about your roof? Winters are particularly harder on roofs than any other season, especially if you have an asphalt or shingle roof.

The buildup of ice and snow adds weight to your roof that it is not designed to handle. Your roof is your home’s first line of defense against inclement weather, but it can only take so much pressure. The ice that forms in the winter creates ice dams—formed from melted snow refreezing and creating a blockage—as well as gutter ice.

Gutter ice can cause gutters to become too heavy and rip away from your home. Not only does this mean you’ll have to repair and/or replace your gutters, you may also have to contend with the property damage that this could very well leave behind.

Even without ice as a factor, snow itself poses a risk to your roof. This is especially true if you have a flat roof, or an older home with a weakened roof structure already. The problem is that as the snow builds up, it creates too much weight, and your roof can crack or even collapse under all the strain.

The solution to this problem is having roof heating cables installed. These cables do just what the name implies: they keep your roof warm so that snow and ice never have a chance to buildup. Rather, it melts upon impact and drains from your gutters and downspouts just as rainwater would.

Prisons and correctional facilities are full of security threats, it’s just common sense.

That is why it’s a major task and a seemingly forever ongoing one to try everything in the book to reduce threats and increase security for everyone in, near, or even outside the facility.

Today we wanted to address how we can solve 2 major correctional lighting system and things you should look out for when finding fixtures perfect for your building and budget.

Firstly, a LED prison lighting system will reduce indirect stress and irritability in both inmates and staff.

Secondly, LEDs within correctional buildings will improve detection of movement, which we all know is crucial.

How you ask? Well, lets talk about each one individually and break it down a bit more than just one sentence. From there, we will talk about how to go about making the conversion over to LED, like we mentioned at the start.

Have you ever been around a light that was flickering and or buzzing? It can get annoying, and fast. Imagine living under these conditions, everyday all day; no break other than a few hours when you go outside. Sounds like no fun, and it can lead to some serious stress and irritability issues for both inmates and staff.

For obvious reasons, additional stress on inmates will never produce a good outcome for anyone. But, another important point is that this can effect your staff and guards too. It can affect their ability to perform at full capacity, which in combination with highly irritable inmates is not a good mix whatsoever.

With LED technology, they will never be susceptible to flickering nor buzzing. Not even near the end of the lights lifespan will they flicker or buzz, unlike other technologies commonly still used in such facilities. Thus, you can avoid any stress or irritability which may be caused from flickering / buzzing lights.

If you can’t tell where everyone is at every second, you’ve got an issue. This is especially important for outdoors during the time when it is dark out. Sure, some light is better than none; but why jeopardize your operations with a flickering light when you could upgrade to LED and get rid of the issue entirely?

As you may or may not know, flickering lights make it harder to not only detect movement, but also identify humans. Think of a strobe light, it’s a bit harder to actually make out what is going on entirely. This holds true with a flickering light, even if it isn’t as bad as a strobe light is.

Here we are going to list a couple of the other major general benefits that LED technology offers over other technologies such as metal halide, HPS, fluorescent, and similar.

There are really only two routes you can take, LED retrofit lighting kit will work perfectly. On top of that, retrofitting is a much cheaper option (typically) then a full replacement is. So, if you don’t need to fully replace then stick with retrofit kit LEDs and you will save a lot on your lighting system investment.

Conclusion

Flaws can always be picked at, especially in such tedious and unpredictable environments like the one we are discussing in this topic.

Phil Neal, originally from Massachusetts is Custom Electrical Services new construction manager.  Phil has a variety of responsibilities including overseeing installations, scheduling, and quality control.  Phil is a very experienced electrician in areas such as residential electrical, commercial electrical, service and repair and has received his certification as a licensed Journeyman electrician.

Phil is a 4 year veteran of the U.S. Navy and a 4 year veteran of the United States Marine Corps.  Phil has been deployed to Iraq and has traveled the globe throughout is military career.  He has a wife Deanna a son and twin girls.  With his free time Phil enjoys spending time with his family and taking his kids to the park.

Thank you Phil for your service and being such a critical park of Custom Electrical Services!

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