ПРИЛОЖЕНИЕ
RS485 Communication Cables are designed for high-reliability differential serial data transmission, полностью соответствует стандарту электрического интерфейса TIA/EIA-485. Они обеспечивают стабильную связь на больших расстояниях с превосходной защитой от помех., и широко используются в:
- Системы управления промышленной автоматизацией (ПЛК, DCS, Сеть системы SCADA)
- Автоматизация зданий & интеллектуальное управление зданием (БМС, контроль доступа, системы пожарной сигнализации)
- Smart grid & power distribution automation equipment communication
- Security & video surveillance system data transmission
- Traffic signal & intelligent transportation system (ITS) networking
- Проекты возобновляемой энергетики (солнечный, wind farm) field device communication
- Petrochemical, metallurgy & mining field instrument and sensor data transmission
These cables can be installed in cable trays, buried in conduits, laid indoors/outdoors, or deployed in harsh industrial environments, with excellent resistance to electromagnetic interference, mechanical stress and environmental corrosion.
СТРОИТЕЛЬСТВО
- Дирижер: Annealed Bare Copper / Tinned Copper, Сорт 1 (solid) / Сорт 5 (застрявший) conductor, common sizes AWG24/22/20 (0.2mm²~0.5mm²)
- Изоляция: High-performance Cross-linked Polyethylene (СПЭ) / Polyethylene (ЧП) / PVC insulation, ensuring stable dielectric properties and standard 120Ω characteristic impedance
- Twisted Pair: Core wires twisted in pairs with precise lay length, to reduce crosstalk and ensure differential signal transmission stability
- Drain Wire: Tinned copper drain wire for continuous and reliable grounding (for shielded structures)
- Inner Shielding: Aluminum Foil Shielding (100% coverage) for all-round anti-electromagnetic interference protection
- Total Shielding: Tinned Copper Braided Shielding (coverage ≥85%), for enhanced EMI/RFI resistance in harsh industrial environments
- Внутренняя подкладка: Extruded polymer inner lining for core structure reinforcement and protection
- Броня (optional): Стальная ленточная броня (СТА) / Steel Wire Armour (СВА) for mechanical damage protection, suitable for direct burial and harsh outdoor scenarios
- Внешняя оболочка: High-quality PVC / ЛСЖ (Низкодымный, нулевой галоген) / ЧП / PUR sheath, customizable for different environmental requirements
- Основная идентификация: Color-coded core pairs for easy on-site installation and maintenance
ХАРАКТЕРИСТИКИ
- Characteristic Impedance: 120Ω ±20%, fully matching the electrical requirements of TIA/EIA-485 standard
- Температурный рейтинг:
- Conductor continuous operating: -40℃~90℃ (XLPE insulated type); -20℃~70℃ (PVC insulated type)
- Короткое замыкание: 160℃ (Макс 5 seconds for XLPE insulated type)
- Transmission Performance: Supports transmission rate up to 10Mbps (12m short distance) / 100kbps (1200m long distance), with low attenuation and low signal reflection
- Anti-interference Performance: Shielded structure provides excellent resistance to electromagnetic interference (ЭМИ) и радиочастотные помехи (RFI), ensuring stable data transmission in strong electric interference industrial environments
- Механическая прочность: Excellent bending and tensile resistance, minimum bending radius ≥10× cable outer diameter (фиксированная установка); ≥15× cable outer diameter (flexible installation)
- Environmental Resistance: Customizable sheath provides resistance to oil, corrosion, UV, abrasion and weathering, adapting to harsh industrial, outdoor and underground scenarios
- Гибкость: Available in solid conductor (for fixed wiring) and stranded flexible conductor (for mobile and drag chain applications)
СТАНДАРТЫ
- TIA/EIA-485: Electrical characteristics of balanced digital multipoint systems
- МЭК 61158: Industrial communication networks – Fieldbus specifications
- МЭК 60228: Conductors of insulated cables
- МЭК 60332: Tests on electric and optical fibre cables under fire conditions
- ГБ/Т 9330: Plastic insulated control cables (Chinese national standard)
- UL 2464: Multi-conductor flexible cables with or without shielding (Североамериканский рынок)
- ИСО/МЭК 11801: Information technology – Generic cabling for customer premises
- МЭК 60079: Explosive atmospheres standards (for intrinsic safety type cables)
Экранированный кабель THHN/THWN-2
THHN/THWN-2 cables are use in Class 1, Разделение 2 Опасные места, например, те, которые встречаются в масле., газовая и нефтехимическая промышленность.