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Home Products Computer Cable

Computer Cable

Home Products Computer Cable

Computer Cable

[ Computer Cable ]

Computer Cable

[ Product Overview ]

Computer cables are signal transmission cables designed for automation control systems and computer measurement and control networks. They are suitable for digital signal transmission with a rated voltage of 300/500V or below. The products have excellent anti-interference performance, transmission stability and easy installation, and are widely used in DCS systems, PLC control and other occasions that require high-precision signal transmission.

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Product Details

Economical

Safe and Reliable

High Insulation Strength

Easy Installation

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Product Categories

model	name	Structural features	Shielding method
DJYVP	Polyethylene insulated copper wire braided shielded cable	Twisted pair structure	Partial shielding + overall shielding
DJYPV	Polyethylene insulated copper foil shielded cable	Twisted pair structure	Sub-shielding
DJYVRP	Polyethylene insulated soft core shielded cable	Multi-strand soft conductor	Double shield
DJYJP	High temperature resistant computer cable	Fluoroplastic insulation	Triple Shielding

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Technical Parameters

Electrical properties

In the electrical performance indicators, the standard value of the working capacitance is required to be no more than 110pF/m. This parameter needs to be measured under the test condition of 1kHz to evaluate the energy storage characteristics and signal coupling capabilities of the line.

The standard value of capacitance unbalance is ≤3pF/100m, also tested at a frequency of 1kHz. This indicator is used to measure the degree of symmetry of capacitance between lines to ensure the stability of signal transmission.

In terms of characteristic impedance, it is stipulated as 120±15Ω and needs to be measured under 1MHz frequency conditions. It plays a key role in signal transmission quality and anti-interference ability.

The standard value of the attenuation constant is ≤0.25dB/m. This parameter is tested at a frequency of 10MHz and reflects the energy loss of the signal during transmission.

The standard value of insulation resistance is ≥5000MΩ・km, measured at an ambient temperature of 20℃, and is used to evaluate the performance of insulating materials and ensure the safety of electrical equipment.

These parameters and their corresponding standard values and test conditions regulate the performance requirements of electrical equipment from different dimensions, ensuring that the equipment operates stably and reliably under specific working conditions.

Transmission performance

When the frequency is 1MHz, the maximum attenuation of the line is 2.1dB/100m, and the near-end crosstalk needs to reach ≥60dB to ensure low loss and anti-interference capabilities of low-frequency signal transmission.

At a frequency of 10MHz, the maximum attenuation is increased to 6.8dB/100m, and the near-end crosstalk standard is adjusted to ≥50dB. At this time, it is necessary to balance signal attenuation and crosstalk suppression to ensure transmission stability in the mid-frequency band.

When the frequency increases to 100MHz, the maximum attenuation increases significantly to 22.0dB/100m, and the near-end crosstalk requirement is ≥40dB. The high frequency band poses higher challenges to the signal loss control and anti-interference design of the line.

In general, as the frequency increases, the maximum attenuation of the line gradually increases, and the near-end crosstalk standard decreases accordingly, reflecting the differences in signal transmission characteristics in different frequency bands and the corresponding performance optimization directions.

Mechanical environmental performance

Bending radius

≥8D (fixed installation)/12D (mobile use)

tensile strength

≥10N/mm² (sheath)

Operating temperature

-40℃～+70℃（PVC sheath）/-60℃～+200℃（FEP insulation）

Flame retardant grade

IEC 60332-1 (IEC 60332-3 Class C optional)

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Product Features

Precise transmission

Adopt precise twist pitch design (pitch difference ≤ 5mm)

Transmission delay deviation ≤1.5ns/m (at 100MHz)

Anti-interference design

Triple shielding structure (sub-shielding + overall shielding + armoring)

Transfer impedance ≤ 1Ω/km (100MHz)

Reliable connection

Special metal-plated connector (gold-plated/silver-plated optional)

Passed 500 plug-in and pull-out tests

Safety and environmental protection

Low smoke halogen-free sheath (light transmittance ≥ 60%)

ROHS 2.0 certified

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Application Scenarios

In the application of DCS system, it is recommended to use DJYVP2-22 cable. Its armored structure has excellent anti-electromagnetic interference ability, which can ensure the stable signal transmission of the control system in a complex electromagnetic environment.

For industrial Ethernet scenarios, the DJYVP-821.0 cable model is an ideal choice. This model meets the CAT5e-level transmission performance requirements, can support high-speed data communications, and adapt to the high bandwidth requirements of industrial networks.

In servo control systems, DJYVRP cable, with its high flexibility and bending resistance, can adapt to the working conditions of frequent movement and multi-angle rotation of equipment, extend the service life of the cable and ensure the reliability of the control signal.

The nuclear power control field has extremely high requirements for the environmental adaptability of cables. The DJYJP model cable adopts a radiation-resistant design and can work stably in a strong radiation environment, meeting the strict safety and durability standards of the nuclear power system.

Different application scenarios are matched with corresponding cable models according to their unique technical requirements. These recommended solutions provide reliable guarantees for signal transmission in various fields through targeted structural design and performance optimization.

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Typical Applications

导体：

Oxygen-free copper wire (0.2-2.5mm²

insulation:

PE/XLPE/FEP(Thickness 0.3-0.8mm)

shield：

Sub-shielding: Aluminum foil/Copper foil (coverage ≥ 90%)
Total shield: copper wire braid (density ≥ 85%)

jacket：

Sub-shielding: Aluminum foil/Copper foil (coverage > 90%)
PVC/LSZH (thickness 1.0-1.8mm)

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Selection Guide

Select by signal type

For the transmission of analog signals, it is recommended to use DJYVP cable with a cross-section requirement of ≥0.75mm². This specification can meet the basic requirements of analog signals for line stability and anti-interference.

When transmitting digital pulse signals, DJYPVP cable is a better choice, and a cross-section of ≥1.0mm² is required. A larger wire diameter helps reduce signal attenuation and ensures fast and accurate transmission of digital pulses.

The particularity of high-frequency signals requires the use of DJYVP-3C model cable, which adopts a twisted pair + coaxial composite structure, which can effectively suppress electromagnetic interference and signal loss in the high-frequency band and ensure the transmission quality of high-frequency signals.

Different signal types correspond to different cable models and cross-sectional requirements. This targeted selection can optimize the transmission effect according to the signal characteristics and avoid signal distortion or interference problems caused by improper line matching.

Select according to environmental requirements

In the face of strong electromagnetic interference environments, a copper tape + copper wire double shielding solution can be adopted. The double shielding structure effectively blocks the interference of external electromagnetic signals and ensures the purity and stability of signal transmission in the line.

In high temperature environments, choose the combination of FEP insulation + glass fiber braiding. FEP insulation material has excellent high temperature resistance. Combined with the glass fiber braided layer, it can further improve the heat resistance level and mechanical strength of the cable, ensuring safe and reliable operation under high temperature conditions.

For corrosive environments, polyurethane sheath is an ideal protective choice. It has strong chemical corrosion resistance and can resist erosion by corrosive substances such as oil, acid and alkali, thus extending the service life of the cable in harsh environments.

These solutions for different environmental factors provide strong protection for the normal operation of cables in complex environments through optimization of material selection and structural design.

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Installation Guidelines

Laying requirements

Distance from power cable: ≥300mm (parallel)/≥100mm (cross)

Fixed spacing: horizontal ≤800mm, vertical ≤1000mm

Grounding Specifications

Shielding layer single point grounding (grounding resistance ≤ 4Ω)

The cross section of the grounding wire is ≥ 1/3 of the cross section of the shielding layer

Special treatment

A magnetic ring needs to be installed when crossing the inverter area

Reserve expansion margin at the bend

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Quality Assurance

Implementation Standards

GB/T 9330/IEC 61156

Warranty period

36 months

Life Cycle

15 years (fixed installation)

Service Support

EMC design support:

Free electromagnetic compatibility solutions

Field Test:

Signal integrity testing services available

Custom Development:

Support special impedance (50Ω/75Ω) customization

Note: It is recommended to reserve 10% spare line pairs for key systems and use redundant wiring for important loops. After the cable is laid, a TDR (time domain reflectometry) test is required to verify the transmission performance.

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After-sales Service

After signing the contract, our company will conduct on-site inspections of the product’s usage environment, provide product technical data sheets, installation manuals, and answer any customer inquiries. We offer high-quality configuration plans based on product characteristics and the environment.

We guarantee timely supply upon receiving the delivery notice, ensuring the product quality meets customer requirements. Our professional after-sales team will transport the products to the specified location and assist with acceptance and storage instructions.

Before installation, we provide technical training and installation guidance to ensure the product meets customer environment and technical performance requirements.

Our after-sales service department offers 24/7 support. We will respond to customer issues promptly and provide solutions. For on-site service, within the city, technicians will arrive within 3 hours, and for out-of-city locations, within 6 hours, to provide excellent technical support.

Our products come with a 5-year warranty, with a lifespan of no less than 40 years under normal use. During the warranty period, we will provide free repair or replacement for any product-related issues and assume all associated responsibilities.

Technical Service

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Material Supply and Transportation Service

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Installation Guidance

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Issue Resolution and On-site Service Response Time

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Warranty Period and Quality Assurance Commitment

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Product