আবেদন
RS485 Communication Cables are designed for high-reliability differential serial data transmission, fully compliant with the TIA/EIA-485 electrical interface standard. They deliver stable long-distance communication with superior anti-interference performance, and are widely used in:
- Industrial automation control systems (PLC, DCS, SCADA system networking)
- Building automation & intelligent building control (বিএমএস, access control, fire alarm systems)
- Smart grid & power distribution automation equipment communication
- Security & video surveillance system data transmission
- Traffic signal & intelligent transportation system (ITS) networking
- Renewable energy projects (সৌর, 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.
নির্মাণ
- কন্ডাক্টর: Annealed Bare Copper / টিন করা তামা, ক্লাস 1 (solid) / ক্লাস 5 (আটকে) conductor, common sizes AWG24/22/20 (0.2mm²~0.5mm²)
- নিরোধক: High-performance Cross-linked Polyethylene (এক্সএলপিই) / Polyethylene (পিই) / 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
- ড্রেন ওয়্যার: 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
- অভ্যন্তরীণ আস্তরণের: Extruded polymer inner lining for core structure reinforcement and protection
- বর্ম (optional): Steel Tape Armour (STA) / Steel Wire Armour (SWA) for mechanical damage protection, suitable for direct burial and harsh outdoor scenarios
- বাইরের খাপ: High-quality PVC / LSZH (Low Smoke Zero Halogen) / পিই / PUR sheath, customizable for different environmental requirements
- মূল শনাক্তকরণ: Color-coded core pairs for easy on-site installation and maintenance
বৈশিষ্ট্য
- Characteristic Impedance: 120Ω ±20%, fully matching the electrical requirements of TIA/EIA-485 standard
- তাপমাত্রা রেটিং:
- Conductor continuous operating: -40℃~90℃ (XLPE insulated type); -20℃~70℃ (PVC insulated type)
- শর্ট সার্কিট: 160℃ (সর্বোচ্চ 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 (ইএমআই) এবং রেডিও ফ্রিকোয়েন্সি হস্তক্ষেপ (আরএফআই), ensuring stable data transmission in strong electric interference industrial environments
- যান্ত্রিক শক্তি: Excellent bending and tensile resistance, minimum bending radius ≥10× cable outer diameter (fixed installation); ≥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
- নমনীয়তা: Available in solid conductor (for fixed wiring) and stranded flexible conductor (for mobile and drag chain applications)
স্ট্যান্ডার্ডস
- TIA/EIA-485: Electrical characteristics of balanced digital multipoint systems
- আইইসি 61158: Industrial communication networks – Fieldbus specifications
- আইইসি 60228: Conductors of insulated cables
- আইইসি 60332: Tests on electric and optical fibre cables under fire conditions
- GB/T 9330: Plastic insulated control cables (Chinese national standard)
- ইউএল 2464: Multi-conductor flexible cables with or without shielding (উত্তর আমেরিকার বাজার)
- আইএসও/আইইসি 11801: Information technology – Generic cabling for customer premises
- আইইসি 60079: Explosive atmospheres standards (for intrinsic safety type cables)
THHN/THWN-2 স্ক্রীন করা কেবল
THHN/THWN-2 cables are use in Class 1, বিভাগ 2 বিপজ্জনক অবস্থান যেমন তেল সম্মুখীন যারা, গ্যাস এবং পেট্রোকেমিক্যাল শিল্প.