Ribbon Cable

Understanding the Applications and Properties of Ribbon Cable

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A ribbon cable, also known as a multiway cable or a ribbon connector, is a flat, flexible cable with many conducting strands or wires running side by side in parallel. The individual wires in a ribbon connector are often bound together with a thermoplastic sheet to form a unitized ribbon. This binding helps in keeping the wires organized and secured together.

Construction and Design

A typical ribbon connector consists of several insulated copper wires arranged side by side in a flat configuration with uniform spacing between the individual strands. The wires are held tightly together by an outer thermoplastic casing or an interwoven fabric tape.

Ribbon Cable are available in various configurations depending on the number of individual wires or contacts. Common widths include 10, 20, 26, 34, 40, 50, 60, 80 and even 100-contacts. The wires can be solid or stranded copper cores depending on the application requirements. The plastic casing surrounding the wires can be made of polyvinyl chloride (PVC), fluorinated ethylene propylene (FEP) or other flexible insulating materials.

Some key design aspects of ribbon connectors include:

– Contact Material: Copper is the most commonly used contact material due to its high conductivity. Other materials like aluminum and beryllium copper alloys are also used.

– Wire Insulation: The individual wires are typically insulated using plastic materials like PVC, FEP or Kapton to provide mechanical strength and electrical insulation.

– Cable Configuration: ribbon connectors can have straight-through wire arrangements or may include crossing wires to reduce skew between signals.

– Connector Termination: The cable ends are generally terminated with pin headers or edge connectors suitable for mating with complementary receptors.

Applications of Ribbon Cable

Due to their compact design and high port density, ribbon connectors find applications in a variety of areas where space is a constraint and multiple electrical connections are required simultaneously. Some common uses of ribbon connectors include:

– Computer Peripherals: Internal ribbon connectors are extensively used to connect various components inside desktop computers, laptops, and printers. Examples include connections between motherboard and drives, chips, and expansion cards.

– Industrial Controls: In automated industrial equipment, ribbon connectors carry signals between machines, motors, sensors, and programmable logic controllers (PLCs). Harsh environments require specially insulated cables.

– Telecommunications: ribbon connectors play a vital role in the wiring of telephone exchange switches and patching systems. Multi-pair ribbon connectors allow high numbers of telephone lines to be bundled together economically.

– Medical Equipment: Due to their flexibility and compactness, ribbon connectors find use inside advanced medical diagnostic devices, patient monitoring equipment and surgical tools.

– Aviation and Aerospace: In aircraft and spacecraft, ribbon connectors deliver power and transmit critical signals between various onboard systems in the least possible space. Military aircraft rely heavily on ribbon cabling.

Advantages of Ribbon Cable

Some key advantages of utilizing ribbon connectors as compared to individual wires include:

– High Density: Much higher pin counts can be accommodated in the same space as single stranded wires due to the closely packed parallel arrangements. This facilitates miniaturization.

– Reduced Skew: Any delays caused due to path length mismatches between signals can be minimized by suitably arranging the individual wires during construction.

– Lower Cost: Bundling many connections into a single flat cable reduces the total amount of materials required as compared to individual cables. Assembly and labor costs are also lower.

– Flexibility: ribbon connectors can easily bend and fold to fit into tight spaces. Their thin profile also enables neat routing and bundling of multiple connections.

– durability: Firm wire bonding and robust jacketing protects the individual conductors, preventing separation or breakage even after repeated flexing.

– EMI Shielding: Metal-clad or braided ribbon connectors provide excellent shielding against electromagnetic interference. This makes them suitable for environments with high EM/RFI levels.

Disadvantages of Ribbon Cable

However, ribbon connectors also have some drawbacks like:

– Limited Lifespan: The insulating PVC jacket may become brittle with age and flexing cycles, causing individual wires to fracture. Rated flex life is lower than twisted-pair cables.

– Difficult Troubleshooting: Failure analysis and wire identification is more tedious in ribbon connectors as compared to multi-core round cables. Repairs also require expertise.

– Restricted Mobility: Being flat, ribbon connectors have limited routing flexibility compared to round cables which can snake easily. Bending radius must not be too tight.

– Vulnerability to Damage: The stranded wire array embedded in plastic is susceptible to physical damage by puncturing, cutting or crushing forces. Additional shielding may be needed.

With their high density and flexible form factor, ribbon connectors continue finding extensive usage wherever space is constrained and multiple connections need to be bundled in a cost-effective manner. While offering reduced installation costs, their relatively fragile nature demands cautious handling during deployment and maintenance work. With improvements in construction materials, modern ribbon connectors provide viable connectivity even in demanding industrial settings.

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*Note:
1. Source: Coherent Market Insights, Public sources, Desk research
2. We have leveraged AI tools to mine information and compile it

About Author – Ravina Pandya
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Ravina Pandya,a content writer, has a strong foothold in the market research industry. She specializes in writing well-researched articles from different industries, including food and beverages, information and technology, healthcare, chemicals and materials, etc. With an MBA in E-commerce, she has expertise in SEO-optimized content that resonates with industry professionals.  LinkedIn Profile