Below is the best information and knowledge about how does a terminal block work compiled and compiled by the lifefindall.com team, along with other related topics such as:: Terminal Block, Screw terminal, Weidmüller terminal, Terminal with saddle jumper 2 connection points, Terminal in electric circuit, Terminal connector, Connector, Use connector.
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The most popular articles about how does a terminal block work
Electrical Terminal Blocks in Industrial Automation – c3controls
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Summary: Articles about Electrical Terminal Blocks in Industrial Automation – c3controls A terminal block is a modular, insulated block that secures two or more wires together. Factories use terminal blocks to secure and/or terminate wires. In their …
Match the search results: The current requirement is the most important thing to consider when choosing which type of terminal block to use. That’s because if too much current is pushed through a terminal block, it can overheat and destroy the terminal block.
Summary: Articles about What is a Terminal Block – Gateway Cable Company Terminal blocks work by directing electrical current through an insulated body, allowing for multiple wires to work simultaneously side by side.
Match the search results: A terminal block is a tool used to safely connect two or more wires together. Also known as a terminal block connector, these blocks use a clamping component and conducting strip to secure and organize connecting wires. A terminal block allows users to join multiple outgoing wires to one singular i…
Summary: Articles about Types of Terminal Blocks – RealPars At first glance, a Ground terminal block looks like a typical Screw-in terminal block. Instead of connecting wires, the Ground terminal block …
Match the search results: The Barrier terminal block is very similar to a Screw-in terminal block as they use screws to clamp the wires. Depending on the application and environment, the Barrier terminal strip may have a small lid to protect the wiring.
What’s there to know about terminal blocks for control …
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Summary: Articles about What’s there to know about terminal blocks for control … We’re talking, of course, about the hard-working terminal block. What exactly is a terminal block and what function does it serve in …
Match the search results: Another common way to classify terminal blocks is by the method of terminating the wire or making the connection. Terminal blocks are available with a number of different connection methods. The most common are screw-in types where the wire is pressed against a metallic conducting plate or bar and t…
Basics of terminal blocks and their various subtypes – Design …
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Summary: Articles about Basics of terminal blocks and their various subtypes – Design … Terminal blocks with screw terminals employ screws to secure cable and wire in place. Typically found on blocks handling moderate voltages and …
Match the search results: • Terminal blocks for the transmission of I/O signals
• Terminal blocks for power distribution
• Terminal blocks for motor connections — including single-phase and three-phase motors for various industrial uses
• Terminal blocks to serve as ground blocks — designed specifically to make connection to…
The Ultimate Guide to Terminal Block Selection | CUI Devices
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Summary: Articles about The Ultimate Guide to Terminal Block Selection | CUI Devices Often referred to as Eurostyle or wire-to-board terminal blocks, PCB mount terminal blocks work by inserting bare wires into the module where a clamp secures …
Match the search results: A terminal block consists of a modular housing with an insulated body that secures two or more wires together. Terminal blocks—also referred to as terminal connectors, connection terminals, or screw terminals—are used in a wide array of applications where electrical systems need to be sa…
A Guide to Terminal Blocks and Types – Hitaltech UK
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Summary: Articles about A Guide to Terminal Blocks and Types – Hitaltech UK They’re useful when working with a design that has certain physical … The type of terminal block you choose should match the voltage and …
Match the search results: Terminal blocks join or terminate electrical wires. This is a simple but effective way of connecting wires. Other names for terminal blocks are connection terminals, terminal connectors and screw terminals.
Summary: Articles about Terminal Blocks Selection Guide: Types, Features, Applications Terminal blocks are used to secure and/or terminate wires and, in their simplest form, consist of several individual terminals arranged in a long strip.
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A Full Guide To Terminal Blocks: What They Are, Types and …
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Summary: Articles about A Full Guide To Terminal Blocks: What They Are, Types and … A Full Guide To Terminal Blocks: What They Are, Types and Working … You should never over tighten the screws in a terminal block as they can break and …
Match the search results: Mounting terminal blocks depends on what type of terminal block you have. Some terminal blocks are din rail mounted, this means that they are slotted at the back to clip onto din rail that is normally used in electrical panels. Din rail mounted terminal blocks sometimes can also be clipped into each…
How to Properly Use a Terminal Block | DoItYourself.com
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Summary: Articles about How to Properly Use a Terminal Block | DoItYourself.com A plug-in connection has a male terminal at the end of the wire. This terminal is connected to the female port on the terminal block and forms a …
Match the search results: A plug-in connection has a male terminal at the end of the wire. This terminal is connected to the female port on the terminal block and forms a secure connection. Plug-in blocks are commonly used in the fuse boxes of automobiles.
Summary: Articles about Terminal Blocks | Pacer Group In this way, a terminal block can be used as a hub where maintenance can be performed more easily. They work by clamping down on a bare wire (European terminal …
Match the search results: Terminal blocks are implemented in applications where circuits need to be in close proximity yet remain separate. This is done for a variety of reasons. Our terminal blocks are the perfect choice when installing new equipment and are equally useful when replacing existing equipment as well. Let’s sa…
Summary: Articles about Uses for terminal strips – PKYS If you have more than one circuit to feed from each circuit breaker you just run a single wire from the panel to the terminal block, use a …
Match the search results: If you decide to replace your circuit breaker panel you may find that the existing wires are too short to reach the new one. The solution is to set up an organized array of terminal blocks at the back of the panel enclosure and take the old wires to there, where they will almost certainly reac…
What is the utility of a terminal strip? – Kraus Muller
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Summary: Articles about What is the utility of a terminal strip? – Kraus Muller But, do you know the objective of using the strips or even what terminal strips are? … or junction connector is a device that works as a wire connector.
Match the search results: In order to understand what the terminal strip is, it’s important to understand what Is a terminal. The so-called terminal or junction connector is a device that works as a wire connector. Which means, it works in a safe manner as a connection point between wires or plugs and the devices. By avoidin…
Summary: Articles about Terminal Blocks, Phoenix Contact Terminal Blocks & Strips A terminal block or strip is a modular electrical connector that is designed to connect a single incoming wire to multiple outgoing wires. With its insulated …
Match the search results: The design of ground (or earth) terminal blocks makes it possible to interchange with standard terminal blocks. Their role is to ground wires or systems for safety reasons and help to prevent interference from electrical or other signals. Unlike other single-level feed-through terminals, ground term…
Summary: Articles about Screw terminal – Wikipedia Screw terminals, as individual connectors to a board at left, as a barrier strip with setscrews at top, and as a barrier strip with attached spade and loop lugs …
Match the search results: Alternatively, terminals can also be arranged as a terminal strip or terminal block, with several screws along (typically) two long strips. This creates a bus bar for power distribution, and so may also include a master input connector, usually binding posts or banana connectors.
A Complete Guide to DIN Rail Terminal Blocks – RS …
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Summary: Articles about A Complete Guide to DIN Rail Terminal Blocks – RS … How to Use a Terminal Block Connector … To use a terminal block connector, it is necessary to connect it to your DIN rail. Once you have selected a fully …
Match the search results: DIN rail terminal blocks are also distinguished by their levels. A single-level model has a single wire connection – also known as a single feed through. By contrast, a dual-level model has two connections – one above the other. The second set of wiring effectively functions as a second terminal blo…
4 Primary Types of terminal Blocks – Sr Indus Electro Sys
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Summary: Articles about 4 Primary Types of terminal Blocks – Sr Indus Electro Sys Terminal Block are a connector used to wind up a single wire and connect it to another system or circuit. There are wide range of terminal …
Match the search results: Barrier terminals are similar to screw terminals and use screw to hold the cables although they have more than one termination point for multiple cables and have small barriers between every terminals. Some Barrier terminals also have a small lid and an enclosure to protect the cabling. These are co…
Summary: Articles about Push-In Connection Technology – Altech Corp. This type of terminal block needs the least human interaction and works well … terminal blocks add an additional option for your toolbox that could save …
Match the search results: The specially designed clamping mechanism for push-in terminal blocks allows them to be thinner, even with a 600 V capacity. This size reduction allows for 33% more wire density without compromising in voltage stress, pollution degree or surge voltage. A most compact 3.5mm terminal block thickness a…
Summary: Articles about Terminal Block Connectors – Curtis Industries Terminal Block Connectors … Terminal blocks (sometimes called screw terminals) are electrical connectors used to attach wires in the same circuit without having …
Match the search results: From barrier terminal blocks to high-voltage terminal blocks to printed circuit board terminal blocks our team of engineers can manufacture any style to your exact specifications. Some of our custom manufacturing capabilities include:
Summary: Articles about Types of terminal blocks (With accessories) The terminal block is a type of connector used to connect two or more cables to each other. By using a terminal block it is possible to make a safe connection …
Match the search results: The terminal block is a type of connector used to connect two or more cables to each other. By using a terminal block it is possible to make a safe connection between the cables. Using terminal block is the most effective way of preventing incorrect wiring.
Summary: Articles about Terminal Block Basics – RSP Supply We have all seen this type of wire connection: exposed twisted wires – Does it work? Yes. – It allows electricity to flow – It is NOT safe. It’s messy and …
Match the search results: [0m:4s] Hello I’m Josh Bloom, welcome to another video in the RSP Supply education series. Today’s video, we want to talk to you a little bit about terminal blocks. But to better illustrate what a terminal block is and how they actually work, we want to start with something that’s probably a little …
By 2022,fixed automationis expected to reach US$120 billion. In the world of factory automation, there has been a constant effort to operate many processes in a controlled manner.
Mass productionis thus helped by the increase in the quality of production and the reduction of lead times. Having the appropriate electronics located in the control cabinet is very important.
The terminal block is an important part of the process. They help achieve safe power and signal distribution and it is important to know more about how they work and when to use them.
Keep reading to learn everything you need to know about terminal blocks.
What is a terminal block?
A terminal block is a modular insulating block that holds two or more wires together. Factories use terminal blocks to secure and/or terminate wires.
In their most basic form, terminal blocks consist of several individual terminals arranged in a long strip. The most useful terminal block for connecting wiring to ground.
There are hundreds of millionsterminal block in usetoday, and more are being installed every day.
Advantages of the terminal block
The biggest advantage of the terminal block isCost. They are less expensive than other types of connectors.
Terminal blocks can also save time as the wiring process is not as complicated as some other blocks. Most well-equipped outlets can easily connect wires using terminal blocks simply by stripping them.
By investing in multi-level terminal blocks, you can reduce panel space by up to 50%. This is because multi-level blocks contain multiple levels of circuits with that single block.
Terminal blocks increase safety by grounding, isolating and protecting other circuit components. Terminal blocks are available with anti-pinch connections to prevent electric shock.
Additionally, terminal blocks can also provide test points, which add additional safety to the circuit.
Easy to install
Then they can be installed with a screwdriver. They also provide quick connect/disconnect, facilitating maintenance and troubleshooting.
Along with the power supply, the power terminal block is used to connect switches and electrical outlets to the mains.
Made of copper alloy
Most terminals include acopper alloyuse the same coefficient of expansion as that for which the wire is intended. Using the same expansion coefficient prevents loosening due to different expansion rates.
It also reduces corrosion caused by electrolytic action between two dissimilar metals.
Disadvantages of the terminal block
The biggest disadvantage of terminal blocks is that the wires can be thrown out of them if vibrated or jostled. Even well-secured connections tend to loosen.
Always test connections before deploying. Make sure it can withstand the conditions in which it is placed.
The terminal blocks are also sometimes too large for the required surfaces. They often provide better cab wiring options and are not required.
Types of terminal block structures
Terminal blocks can be classified according to their structure and type of device.
Terminal blocks can be grouped according to the type of device they connect to or the application.
1. Disconnect the blockmakes it easy to disconnect a circuit with a knife switch without having to remove any wires. Switch blocks are another name they go by.
2. Owner of the fusehelps to connect multiple devices together using multiple fuses. Only the wires connected to the fuse holder are affected in the event of a short circuit.
3. Ground circuit terminalground system or components. They can be inserted into a terminal block and are often interchangeable with standard terminal blocks.
4. Block I/Oallows devices and controllers to communicate with each other.
5. Power distribution blockunplug the power cable.
6. Sensor block / Actuatorused to manipulate devices such as optoelectronic sensors and three- or four-wire proximity sensors.
7. Thermocouple blockconnect the thermocouple. They also provide consistent metal connections for temperature measurement.
Types of works
1. Only one power supply
The most basic type of terminal block are single level products. They are used for wiring
Single power terminal blocks have one output contact and one input contact. Two separate wires are fed from each side of the terminal block. Then they are connected in his house.
2. Double level
Double level terminal blockUse two levels of contacts. This simplifies wiring and saves space.
Typically, multilevel products use a bridge to connect one contact level to another. This increases the flexibility of the circuit.
3. Three levels
Tertiary terminal blocks are identical to double-tier products, but with an additional layer of stacked contacts. And like two-level terminal blocks, they can be interconnected.
4. High density terminal block
High density terminal block designed with OEM in mind. They are simple to install and the large marking strips can be hand marked or custom printed to allow quick and accurate terminal identification.
Terminal block characteristics
Some terminal blocks include one or more special features.
Pluggable terminal block
With plug-in terminal blocks, conductor connections allow circuit breaking without:
Enable Quick Disconnect
By combining the pluggable terminal blocks in a certain way, it is possible to disconnect power from an entire group of terminals at once by simply removing a single plug.
Stackable terminal blocks
To save space, stackable terminal blocks can be mounted side by side. These are usually DIN rail mounted devices.
Some terminal blocks have indicator lights. This light emitting diode (LED) confirms that current is flowing through the device.
The terminal blocks with inter-circuit diodes make it possible to test the lamps. They also offer reverse polarity protection.
Guidance and Specifications
Terminal blocks typically have three different wire entry angles:
The way the wire is attached to the block is called contact, position, way or pole. When purchasing terminal blocks, it is important to know the number of contacts to match the number with the number of wires required for the application.
The contact pitch is directly related to the number of contacts and is expressed in millimeters. It is the distance between each contact measured from the center of each hole or hole.
Installation instructions for screw terminal block
Once you know the exact type of terminal block and have purchased it, it is time to install it. Turn off all electrical equipment before installation for safety reasons.
If you have a bolt-on terminal block, strip a small amount of insulation from the terminal block wiring. Usually an inch works well, but may depend on the component used.
Unscrew the terminal block fixing screw. Then thread the wire through the hole.
Take care to tighten the screw well
Carefully screw the screw in place. It is important to fully tighten the wire because otherwise the wire will heat up and melt the insulation. This could cause a fire.
Secure plug-in connection
Once you have located the terminal block, route the power cables through it. Then connect the male terminal to the female port.
Then press down firmly to ensure the secure connection does not loosen due to movement.
Safety test equipment
After making all the connections to the terminal blocks, it’s time to testEquipmentto make sure it is working properly. It is extremely important to check everything to make sure everyone is working on itSecure environment.
Don’t forget to check the terminal block as well as the connections to make sure there is no excessive heat.
Check the wires to make sure they are still in a secure position.
Mounting Terminal Blocks
Most terminal blocks are screwed to the control panel, attached to a metal rod, or mounted on a printed circuit board.
Mounted terminal blocks are typically implemented on some form of DIN (Deutsches Institut fur Normung) rail. DIN is the German standards body that originally published railway specifications.
Terminal blocks are manufactured to fit one of many DIN rail sizes such as:
1. Top hat for miniature rails
Miniature hats15mm wide track. They are rated at 300V.
2. G32 track.
As the name suggests, these rails are shaped like the letter “G” and are 32mm wide. They can handle terminal blocks rated at 60V.
3. Hat shaped rails
The rails on the hats look exactly like their miniature versions except for the 35mm width. They are rated at 600V.
4. PCB mounting
There are also terminal blocks manufactured to be mounted on printed circuit boards. Some products can be plugged into a pin strip attached to the board.
Others have built-in pins for mounting via a breadboard. They are also known as electronic blocks.
Optional method to achieve a wired connection
There are several different methods to choose from for making wiring connections using terminal blocks.
Insulation displacement connection (IDC)
The isolated displacement connection makes it possible to establish a connection by pushing a wire between two sharp metal parts. This establishes the connection without exposing bare wires.
The screw clamp makes an electrical connection by using the screw to clamp the wire. They are the industry standard for finishing methods.
The screw clamp can meet a variety of wire sizes. They also provide reliable connections.
The spring clip retains the cable tie using spring force. They are a new alternative to screw clamps.
Spring clamps are especially useful in applications where work space is limited and small wire diameters need to be considered.
Tab connections are also known as blade or spade terminals. They are designed to be inserted and removed quickly without soldering.
Applications for terminal blocks in industrial installations
Terminal blocks are commonly used in industrial equipment such as cable rack boxes and control boxes. Terminal blocks are commonly found in the following types of equipment used in industrial installations:
Energy-saving lighting (LED)
Urban and outdoor LED lighting
All electric machines
Wherever power is distributed!
The type of terminal block you need depends on a few factors.
As there are several types of terminal blocks available, it is important to know which is the right choice before installation.
Demand in progress
Current requirements are the most important thing to consider when deciding which type of terminal block to use. This is because if too much current is pushed through the terminal block, it can overheat and destroy the terminal block.
Make sure the terminal block can handle the intended current usage, then add an extra 50% just to be sure.
It is also important to consider the amount of tension. Otherwise, the voltage may cause dielectric breakdown.
The voltage may be too high for the terminal block and cause current leakage between closely spaced terminal blocks. Be aware that high voltage requirements are rare in the design.
Most of the time, voltage considerations are ignored for voltages below 100V. Even then, you should always check the voltage before selecting the terminal block.
Wire in use
The threads are not equal. Each type of thread has its own advantages and disadvantages.
When selecting the terminal block, be sure to tell the wire the wire size. It must physically correspond to the terminal block.
Find out if it is a single-core or multi-core cable, as multi-core wire works best with screw terminals. Meanwhile, single core wire works best with push-fit connectors.
Mechanical resistance and environment
Consider the environment when selecting a terminal block. Some terminal blocks are built for mechanical strength. They can withstand high currents.
However, if the connector is used in a naval environment, salty air can corrode the metal contacts.
The environment in which the terminal block is used may produce large benign oscillations and/or contain mechanical vibrations. If this happens, the screw heads can become unreliable.
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Warning: The content is provided for general informational purposes only and is provided with the understanding that the authors and editors herein do not engage in technical rendering or other professional advice or services. Engineering practice is driven by site-specific circumstances unique to each project. Therefore, any use of this information should be made only in consultation with a qualified and licensed professional who is able to consider all relevant factors and desired results. The information is displayed with care and concern. However, some information may be incomplete, inaccurate or not applicable to specific circumstances or conditions. We are not responsible for any direct or indirect losses resulting from using, relying on, or acting on the information in this blog post.
Popular questions about how does a terminal block work
how does a terminal block work?
Terminal blocks at a glance Terminal blocks are connectors that terminate a single wire and connect it to a circuit or other system. Terminal blocks come in a range of shapes, sizes and ratings, but always terminate a single wire (single pole) and are never multi-pole.
How do you wire a terminal block?
How do ground terminal blocks work?
Grounding terminal blocks clamp mechanically onto the DIN Rail by tightening the center mounting screw, making a reliable electrical connection between the cage clamp terminals and the DIN Rail. The rail serves as a busbar and automatically distributes ground potential to all other ground terminals on the same rail.
How many wires can you put in a terminal block?
The ASI multiple wire terminal blocks are blocks which allow for the independent connection of 3 to 4 wires in the same terminal block, depending on model, which are internally connected together.
How does a terminal block relay work?
The contactor requires a 230V AC supply across its coil. Now, because the PLC can only provide 24V DC signal against the requirement of 230V, a Terminal block relay is used as an interposing relay. It is energized using PLC output, the contacts of the relay then switch the contactor coil to drive the motor.
Can you use terminal blocks in residential wiring?
Terminal blocks come in different types, for use in different kinds of wiring system designs. The number of poles in a terminal block equates to the number of circuits you can connect to the block. Some blocks are double or even single-pole, while others can house as many as 24 poles.
How do you read terminal block diagrams?
Why terminal blocks are used?
Terminal blocks increase safety by grounding, isolating, and protecting the other components in the electrical circuit. Terminal blocks are available with finger-safe connections to prevent electrical shock. And, terminal blocks can also provide test points, which add even more safety to the circuit.
What is the difference between a busbar and a terminal block?
The biggest difference between a terminal block and a bus bar is that a terminal block has separated circuits where each incoming wire is paired with an outgoing wire whereas a bus bar gathers multiple wires together for electrical distribution. The easiest way to tell them apart is by the tinned copper body.
Can you cut connector strips?
* Terminal Block Strip can be easily cut to shorter lengths if required. High elasticity,withstand high temperatures and pressure,high impact resistance. High electrical conductivity,good insulation.
How do you hook up a screw terminal block?
What is a barrier terminal block?
Barrier terminal blocks are PCB or chassis mount connection points for securing two or more wires to a circuit or power bus. They consist of screw, quick connect, solder tab, turret, wire wrap or threaded stud positions arranged in a continuous strip. Each position is fully insulated from the other positions.
What amp terminal block should I use?
It is best practice to use a terminal block that is rated for at least 150% of the max current that is expected in the system.
Can you connect three wires together?
What is feed through terminal block?
A feed-through terminal block is suitable for joining and/or connecting one or more conductors. They could have one or more connection levels that are on the same potential or insulated against one another.
Video tutorials about how does a terminal block work
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We have all seen this type of wire connection: exposed twisted wires
– Does it work? Yes.
– It allows electricity to flow
– It is NOT safe. It’s messy and unreliable.
An improvement on that connection would be a wire nut and wires.
We are all familiar with wire nuts. They are very commonly used to make electrical connections.
– They provide much more safety
– They are more secure.
– Not terribly organized, but get they job done.
An even better solution would be a terminal block. It functions no differently that the two examples I just showed you, except that:
– Commonly used in industrial and commercial applications
– It is much safer
– More secure
– Allows for more connections options
– And gives us the ability to keep our wire much more organized.
Types of Terminal Blocks
They are several different types of terminal blocks that can be used to accommodate different situations, uses and applications
Single Level Pass through terminal block
Just like the wire nut, this type of terminal block is simply used to connect two wires together with a common junction point. This is helpful when a component needs to be disconnected or we simply want to isolate something within the circuit. These are the most common types of terminal blocks you will see in industrial applications.
Ground Terminal Blocks
Look and function and function almost exactly like most pass through terminal block with one exception. They are grounded.
These blocks and a metal connection from where the wire is terminated all the way to the bottom of the block where it will clamp into the panel.
This allows us to ground an electrical circuit without have to run a wire to the main ground connection on a breaker or surge protector
These functions in a very similar manner to the basic pass through terminal block with one exception. There is a fuse located in the terminal block.
This fuse allows us to protect items that we are wiring so that they do not encounter to much voltage or current.
Multilevel terminal blocks
Just like with a basic pass through terminal block, the multilevel terminal block allows for an electrical connection, or junction point. The advantage to using a multilevel terminal block is that it can make 2 or 2 electrical connections in the same block.
Also, this block can incorporate fuses, and have the ability to be ground.
So, in some cases these blocks can be a combination of all the other blocks we have talked about.
Disconnect Terminal Blocks
Similar to a fused block, the disconnect allows us to stop the flow of electricity by lifting this lever on the terminal block. Unlike fuse blocks, the are a more permanent solution, but will not provide any protection in the event of a power surge.
By doing this the metal will no longer be in contact and no electricity will flow.
Safety is one of the main reasons terminal blocks are used. The connections points are very secure, and the design does not allow for short circuits or shock hazards to be a common occurrence.
They are very durable. This is why they are the preferred connection method for industrial use. They can stand up to harsh environments.
They give us the ability to isolate components, sensitive instrumentation, power, etc.
In this video, we introduce and describe terminal blocks, to better illustrate what they do, how they perform their job, and the benefits they provide for the control cabinet and our customers.
In the Control Cabinet Classroom video series, Phoenix Contact Product Specialists Zach and Karen break down some of the basics of control cabinet design, terminology and technology to be able to better understand and utilize this powerful solution.
PT Terminal Block Wire Retention Strength Test Using a Plane –
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In today’s video we want to take another look at terminal blocks. We have several other videos that focus on terminal blocks and cover a wider variety of topics. If you have not already seen any of those videos, we encourage you to go back and watch them as we talk about the many different types, uses and functions of terminal blocks. For the purpose of today’s video, I want to discuss a few of the most common types of terminal blocks, and focus on the different scenarios that we use each unique style of terminal block in. The terminal blocks in which we will discuss are, fuse blocks, single level pass through blocks, and multi level terminal blocks.
While it would be possible to use any of these types of terminal blocks in many different scenarios, it may not make sense to use them in certain situations, even if they can get the job done. For example, while a multi level terminal block can be used to distribute power, it may not be necessary to have more than one terminal available to properly perform that specific task. Using a multi level terminal block would not be necessary or cost effective. So let’s look at a few different areas where each of the terminal blocks we have mentioned would make the most sense. Keep in mind, this is just one method that we use, but there are many different approaches that can taken to achieve the same result.
When looking at power distribution, there are a few different types of terminal blocks that we commonly use. The first is a fused terminal block. The reason a fused block makes sense in this application is because it can give you the ability to limit the amount of current that passes through it, protecting any devices downstream of that particular terminal block. Better yet, if a fused terminal block is used that also has the ability to be disconnected, it then gives you even more ability to control the power coming from that terminal block.
Single level pass through terminal blocks are also commonly used to distribute power throughout a control panel. However, without the ability to provide any fused protection, the pass through terminal block is most commonly used as a junction point. You commonly see this when wiring AC neutral wires, or AC “Hot” wires that are not fused. These single level blocks can allow for a very clean method to distribute power to multiple locations throughout a control panel. Single level pass through blocks can also be used anywhere a junction point is required, not just in power distribution. So… it is common to see them being used in control signals where a junction might be necessary.
Now let’s look at multi level terminal blocks and applications where they might make the most sense. One big advantage to using multi level terminal blocks is the ability they give you to save space when there are a lot a terminations that may be required. In some cases, a multi level terminal block can accommodate three separate circuits in the same amount of space that a single level terminal block could be used. For example, when wiring an analog signal to a PLC, the multi level terminal block could be used for outgoing power to the instrument, return DC, and instrument signal levels…. All in one terminal block. This ability provides great versatility and flexibility when designing industrial control panels.
As you can see, there are many different areas where different types of terminal blocks can be used, but it is best to try to fit the style of terminal block you are using to the applications that will both maximize the use of the terminal block, while not providing more function that is absolutely necessary.