cable block diagram

A wiring diagram is a simple visual representation of the physical connections and physical layout of an electrical system or circuit. It shows how the electrical wires are interconnected and can also show where fixtures and components may be connected to the system.

Use wiring diagrams to assist in building or manufacturing the circuit or electronic device. They are also useful for making repairs.

For example, a home builder will want to confirm the physical location of electrical outlets and light fixtures using a wiring diagram to avoid costly mistakes and building code violations. SmartDraw comes with pre-made wiring diagram templates. Customize hundreds of electrical symbols and quickly drop them into your wiring diagram. Special control handles around each symbol allow you to quickly resize or rotate them as necessary.

To draw a wire, simply click on the Draw Lines option on the left hand side of the drawing area. If you right click on a line, you can change the line's color or thickness and add or remove arrowheads as necessary. Drag a symbol onto the line and it will insert itself and snap into place.

Once connected, it will remain connected even if you move the wire. If you need additional symbols, click the arrow next to the visible library to bring up a drop down menu and select More.

You'll be able to search for additional symbols and open any relevant libraries. You can also change the size and shape of your line hops. Select Show Dimensions to show the length of your wires or size of your component. Click here to read SmartDraw's complete tutorial on how to draw circuit diagrams and other electrical diagrams.

cable block diagram

A schematic shows the plan and function for an electrical circuit, but is not concerned with the physical layout of the wires. Wiring diagrams show how the wires are connected and where they should located in the actual device, as well as the physical connections between all the components.

Unlike a pictorial diagram, a wiring diagram uses abstract or simplified shapes and lines to show components. Pictorial diagrams are often photos with labels or highly-detailed drawings of the physical components. If a line touching another line has a black dot, it means the lines are connected.In the s, there were four television networks in the United States. Because of the frequencies allotted to television, the signals could only be received in a "line of sight" from the transmitting antenna.

People living in remote areas, especially remote mountainous areas, couldn't see the programs that were already becoming an important part of U. Inpeople living in remote valleys in Pennsylvania solved their reception problems by putting antennas on hills and running cables to their houses. These days, the same technology once used by remote hamlets and select cities allows viewers all over the country to access a wide variety of programs and channels that meet their individual needs and desires.

By the early s, cable television had reached nearly half the homes in the United States. Today, U. Some cable systems even let you make telephone calls and receive new programming technologies! In this article, we'll show you how cable television brings you so much information and such a wide range of programs, from educational to inspirational to just plain odd. The earliest cable systems were, in effect, strategically placed antennas with very long cables connecting them to subscribers' television sets.

Because the signal from the antenna became weaker as it traveled through the length of cable, cable providers had to insert amplifiers at regular intervals to boost the strength of the signal and make it acceptable for viewing. According to Bill Wall, technical director for subscriber networks at Scientific-Atlantaa leading maker of equipment for cable television systems, limitations in these amplifiers were a significant issue for cable system designers in the next three decades.

Plus, if one of the amplifiers failed, you lost the picture. Cable got a reputation for not having the best quality picture and for not being reliable. By then, they had also developed technology that allowed them to add more programming to cable service. In the early s, cable systems began experimenting with ways to use microwave transmitting and receiving towers to capture the signals from distant stations. In some cases, this made television available to people who lived outside the range of standard broadcasts.

In other cases, especially in the northeastern United States, it meant that cable customers might have access to several broadcast stations of the same network. For the first time, cable was used to enrich television viewing, not just make ordinary viewing possible. This started a trend that would begin to flower fully in the s.

Cable ( Block Diagram)

The addition of CATV community antenna television stations and the spread of cable systems ultimately led manufacturers to add a switch to most new television sets. People could set their televisions to tune to channels based on the Federal Communications Commission FCC frequency allocation plan, or they could set them for the plan used by most cable systems. The two plans differed in important ways. In both tuning systems, each television station was given a 6-megahertz MHz slice of the radio spectrum.

The channels weren't put into a single block of frequencies, but were instead broken into two groups to avoid interfering with existing radio services. Later, when the growing popularity of television necessitated additional channels, the FCC allocated frequencies in the ultra-high frequency UHF portion of the spectrum. They established channels 14 to 69 using a block of frequencies between MHz and MHz.

Cable Block Diagram

Because they used cable instead of antennas, cable television systems didn't have to worry about existing services. Engineers could use the so-called mid-band, those frequencies passed over by broadcast TV due to other signals, for channels Channels 1 through 6 are at lower frequencies and the rest are higher.

While we're on the subject of tuning, it's worth considering why CATV systems don't use the same frequencies for stations broadcasting on channels 1 to 6 that those stations use to broadcast over the airwaves.

Cable equipment is designed to shield the signals carried on the cable from outside interference, and televisions are designed to accept signals only from the point of connection to the cable or antenna; but interference can still enter the system, especially at connectors. When the interference comes from the same channel that's carried on the cable, there is a problem because of the difference in broadcast speed between the two signals.

Radio signals travel through the air at a speed very close to the speed of light.A cable block diagram typically shows graphically all the pieces of control equipment and panels, etc. Cable number and the number of cores or pairs of cores are usually all that is needed to be shown.

It will also show if the cable is to be provided by the installer, or whether the cable is supplied by an equipment vendor as well. New Post. Comments Format:.

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Both documents are valuable to the installer as well as the specifier. No more "Almost" Good Answers. Anonymous Poster. Ask a Question Start a Discussion. Change Mode. Rate this.Interconnection block diagram is a drawing showing interconnection between each device including instrument, junction boxmarshaling cabinet, panel, etc.

Create Cable Block Diagram

This drawing can provide a glance view of overall connection of system. Some interconnection block diagrams provide detail information start from every field instruments up to control system. Interconnection block diagram should also indicate cable number of each cable connecting two devices. Reference drawing: Instrument and control architecture diagram, instrument cable layout To prepare an interconnection block diagram, reference should be made to instrument architecture diagram and Instrument cable layout.

Instrument and control architecture diagram shows overall instrument and control system within a plant. Hence by having a look to architecture diagram, the preparation of interconnection block diagram is easier.

Instrument cable layout shows every instruments connection to its junction box. Together with instrument cable layout, this drawing is also used as a reference for preparing instrument cable schedule. Skip to content. Home About Terms of Use. Instrument Interconnection Block Diagram. Instrument Drawing. New Youtube Channel. Search for:. Copyright instrumentationportal.SmartPlant Instrumentation. All Rights Reserved. Restricted Rights Legend Use, duplication, or disclosure by the government is subject to restrictions as set forth below.

Unpublished — rights reserved under the copyright laws of the United States. Intergraph Corporation Huntsville, Alabama Warranties and Liabilities. All warranties given by Intergraph Corporation about equipment or software are set forth in your purchase contract, and nothing stated in, or implied by, this document or its contents shall be considered or deemed a modification or amendment of such warranties.

Intergraph believes the information in this publication is accurate as of its publication date. The information and the software discussed in this document are subject to change without notice and are subject to applicable technical product descriptions. Intergraph Corporation is not responsible for any error that may appear in this document. The software discussed in this document is furnished under a license and may be used or copied only in accordance with the terms of this license.

No responsibility is assumed by Intergraph for the use or reliability of software on equipment that is not supplied by Intergraph or its affiliated companies. Microsoft and Windows are registered trademarks of Microsoft Corporation. MicroStation is a registered trademark of Bentley Systems, Inc. Other brands and product names are trademarks of their respective owners.

Table of Contents. General Information. Lab 4: Adding Revisions. Cable Block Diagram 3. Cable Block Diagrams. Cable Block Diagrams CBD provide a graphical representation of the interconnection of the cables and the various junction boxes, marshalling racks, cabinets, and so forth in your project. They show the project cable flow between the various cables and cabinets of your project.This document was uploaded by user and they confirmed that they have the permission to share it.

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cable block diagram

Report DMCA. Home current Explore. Words: 2, Pages: Preview Full text. All Rights Reserved. Restricted Rights Legend Use, duplication, or disclosure by the government is subject to restrictions as set forth below. Unpublished — rights reserved under the copyright laws of the United States. Intergraph Corporation Huntsville, Alabama Warranties and Liabilities All warranties given by Intergraph Corporation about equipment or software are set forth in your purchase contract, and nothing stated in, or implied by, this document or its contents shall be considered or deemed a modification or amendment of such warranties.

Intergraph believes the information in this publication is accurate as of its publication date. The information and the software discussed in this document are subject to change without notice and are subject to applicable technical product descriptions. Intergraph Corporation is not responsible for any error that may appear in this document. The software discussed in this document is furnished under a license and may be used or copied only in accordance with the terms of this license.

No responsibility is assumed by Intergraph for the use or reliability of software on equipment that is not supplied by Intergraph or its affiliated companies. Microsoft and Windows are registered trademarks of Microsoft Corporation. MicroStation is a registered trademark of Bentley Systems, Inc.

Other brands and product names are trademarks of their respective owners. They show the project cable flow between the various cables and cabinets of your project.

Cable Block Diagrams are ideal for use in the preliminary planning stages of your plant to verify the destination panels for cables as no wiring connections or terminations are needed at this early stage of your project. A CBD is also used for ordering made to order MTO cables at the feed stage of your project, and later after completion of your project, as part of the maintenance program to show the location of all major cables, panels, junction boxes, and so forth.

SmartPlant Instrumentation allows you to drag and drop panels from the Domain Explorer to your drawing and position them exactly where you want. The software creates a representation of existing cables on the fly, or you can manually connect cables between item connection points.

You will create panels, cables, and panel symbols and use them accordingly to create a cable block diagram report. A similar report is shown here. Set Font size as shown.

Wiring Diagram

When working with symbols in Symbol Editor, any new macro or text added will use this Font size setting. This will save time when building symbols. Select File Sheet Setup.A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. Block diagrams are typically used for higher level, less detailed descriptions that are intended to clarify overall concepts without concern for the details of implementation.

Contrast this with the schematic diagrams and layout diagrams used in electrical engineering, which show the implementation details of electrical components and physical construction. As an example, a block diagram of a radio is not expected to show each and every connection and dial and switch, but the schematic diagram is. The schematic diagram of a radio does not show the width of each connection in the printed circuit boardbut the layout does.

To make an analogy to the map making world, a block diagram is similar to a highway map of an entire nation. The major cities functions are listed but the minor county roads and city streets are not. When troubleshooting, this high level map is useful in narrowing down and isolating where a problem or fault is.

Block diagrams rely on the principle of the black box where the contents are hidden from view either to avoid being distracted by the details or because the details are not known. We know what goes in, we know what goes out, but we can't see how the box does its work. In electrical engineeringa design will often begin as a very high level block diagram, becoming more and more detailed block diagrams as the design progresses, finally ending in block diagrams detailed enough that each individual block can be easily implemented at which point the block diagram is also a schematic diagram.

This is known as top down design. Each engineering discipline has their own meaning for each shape. Block diagrams are used in every discipline of engineering. They are also a valuable source of concept building and educationally beneficial in non-engineering disciplines.

In process controlblock diagrams are a visual language for describing actions in a complex system in which blocks are black boxes that represent mathematical or logical operations that occur in sequence from left to right and top to bottom, but not the physical entities, such as processors or relays, that perform those operations.

It is possible to create such block diagrams and implement their functionality with specialized programmable logic controller PLC programming languages. In biology there is an increasing use of engineering principles, techniques of analysis and methods of diagramming. There is some similarity between the block diagram and what is called Systems Biology Graphical Notation.

As it is there is use made in systems biology of the block diagram technique harnessed by control engineering [7] where the latter is itself an application of control theory.

An example of this is the function block diagramone of five programming languages defined in part 3 of the IEC see IEC standard that is highly formalized see formal systemwith strict rules for how diagrams are to be built. Directed lines are used to connect input variables to block inputs, and block outputs to output variables and inputs of other blocks.


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