Programmable logic controllers provide automatic control of processes so that very little human intervention is required. Yet, this results in a well-coordinated, repetitive process.

These systems automatically start and shut down critical equipment in large and complex manufacturing processes. When in operation, programmable logic controllers ensure that all conditions are met before starting up a certain machine or process. In addition, the PLC continues monitoring the entire system using a variety of sensors.

Consequently, this ensures that everything runs as programmed. The PLC will trip if it detects a malfunction or abnormality in any of the monitored parameters.

The operating environment, size of the processes, ease of access by operators and maintenance personnel influence the choice of PLC.

A harsh environment with dust or small particles will require a PLC system with an appropriately IP rated enclosure. This prevents ingress of foreign particles into the system. The available space and layout also influence the choice. Therefore, most users require easy access for reprogramming, maintenance, or troubleshooting.

The simplest form of a PLC, all the basic components of a PLC include the I/O points, CPU, and software program. It is typically housed in a single enclosure. These PLCs are attached directly to the equipment being controlled.

Modular PLCs consists of several components on a common bus within a base unit to allow extending of the input and output. These units work on an expandable base unit. Therefore, it provides all the basic components of a PLC, i.e., a power supply, I/O points, memory and the CPU, and slots for additional cards.  These modules, which may be from the same or different manufacturers, are plugged together into a base unit.

This follows the same modular concept, but each of the modules plugs into a rack. The add-on modules are contained in racks which are then linked together through a network of connections. Since the rack mounting PLC is highly scalable, it allows very large systems to be assembled.

In energy management, the PLC monitors and controls equipment such as boiler systems. It helps the organization increase energy efficiency and safety. PLCs are also used in numerous everyday activities. They are found in factories, homes, commercial buildings, airports, unmanned car parks, and more.

Finally, some practical applications include:

It is better to be prepared for a power outage than to have to scramble when one actually happens. Having a drawer, a small space in a cupboard or even a rubber tote filled with the supplies you will need when the power goes out is a good idea. Your Beverly Hills electrician suggests you keep at least one flashlight and some backup batteries, a battery-powered radio, matches and some emergency candles along with sturdy candleholders in your kit. These are just a few things you will need to get you through an outage. You can call The Electric Connection to learn about some other things you may want to keep in your kit.

Once the power goes out, you will want to grab your kit, especially if darkness is falling or it is already dark. If it is daylight, you can take care of these things without needing any light. As soon as the power goes out, you want to go about protecting your sensitive electric equipment. Smart TVs, computers, laptops and so on are very sensitive to electric surges. They need to be unplugged from the wall until after the power comes on and seems to be staying on. Don’t rush right over and start plugging stuff in the second you see the lights come on. It is not uncommon to have the power hiccup a few times before there is a steady stream.

You will also want to turn off any appliances and lights that may have been at the time of the outage. This will help cut down on a surge coming into your home and potentially causing serious damage. If this does happen, you will need to call your electrician. Beverly Hills residents can call The Electric Connection if there have been any side effects from a power outage.

video in which Kathleen Packard, their Healthcare Market Development Manager, discusses how some innovations in lighting can positively affect the healing process (and save energy and money). Packard describes hospitals as being historically “institutional and very uncomfortable,” and her mission is to educate the public on the “importance of design” to patient health.

intrinsically photosensitive retinal ganglion cell in the human eye, which senses light and regulates the body’s systems, including melatonin levels, which are directly related to sleep. Visa’s Amber Night Light, she says, creates ambient light that won’t disturb the intrinsically photosensitive retinal ganglion cell. This allows nurses to check on patients without disturbing their sleep.

Of course, all this valuable information leads us to the problems solved by Visa Lighting’s healthcare light fixtures. Packard calls special attention to the benefits of using LED fixtures. She reminds us that LEDs are indeed a great option for hospitals because they are energy efficient and therefore save money, reducing the cost of healthcare; they render color well, which is necessary, so that doctors and nurses can accurately assess skin pallor; and, unlike fluorescent lamps, LEDs contain no mercury.