Overview
The RS485-6*0.2 is a standardized industrial communication cable specifically engineered for half-duplex RS485 networks. Its six 0.2mm² (24AWG) tinned copper conductors are arranged in three twisted pairs, with one pair typically used for data transmission (A/B lines) and others for power or auxiliary signals. The cable's aluminum foil shielding combined with a tinned copper drain wire provides effective protection against electromagnetic interference (EMI), critical in industrial settings with heavy machinery or variable frequency drives. Conforming to international standards like TIA/EIA-485-A, this cable supports data rates up to 10Mbps over shorter distances or 115kbps at the maximum 1200-meter range. The outer jacket materials vary between standard PVC for general use and low-smoke zero-halogen (LSZH) compounds for installations requiring enhanced fire safety, such as tunnels or subways.
Structure and Working Principle
The cable employs a star-quad construction where conductors are twisted in pairs with precise lay length to minimize crosstalk. Each pair has a characteristic impedance of 120Ω ±15%, matching RS485 transceiver requirements. The aluminum shielding layer covers all conductors beneath the jacket, while the drain wire ensures proper grounding continuity when connected to shielded connectors or terminal blocks. RS485 operates on differential signaling, where the voltage difference between the A (non-inverting) and B (inverting) lines determines logical states. The twisted-pair design cancels out common-mode noise, while the shielding further attenuates external interference. The remaining conductors (typically color-coded) may carry auxiliary power (e.g., +5V, GND) for bus-powered devices or serve as spare lines for redundancy.
Key Features
1. **EMI Resistance**: The combination of twisted pairs and foil shielding provides >60dB attenuation against RFI/EMI, making it suitable for installations near motors or high-voltage equipment. 2. **Durability**: Tinned copper conductors resist oxidation, while the jacket offers UV resistance (for outdoor variants) and mechanical protection against abrasion. 3. **Flexibility**: Despite its shielding, the cable maintains moderate flexibility (bending radius ≥8× diameter) for easy routing in control cabinets. Temperature ratings typically range from -30°C to +70°C for PVC versions and up to +90°C for LSZH types. The cable's capacitance (≤52pF/m) and propagation delay (≤5ns/m) are optimized for high-speed digital signals without excessive distortion.
Application Areas
This cable is extensively used in: - **Industrial Automation**: Connecting PLCs, HMIs, and sensors in production lines - **Building Management Systems**: HVAC controls, lighting systems, and access control networks - **Energy Infrastructure**: Metering systems in solar farms or wind turbines - **Transportation**: Signaling and monitoring in rail/tunnel applications It's particularly favored for Modbus RTU networks and legacy Profibus PA installations. The 6-conductor design allows simultaneous power delivery (e.g., 24VDC) to field devices while maintaining communication, eliminating separate power wiring in compact installations.
Maintenance and Precautions
**Installation**: Maintain at least 30cm separation from power cables; use metallic conduits in high-interference areas. Avoid sharp bends that might compromise shielding integrity. **Termination**: Always connect the drain wire to ground at one end (usually the master device) to prevent ground loops. Use proper RS485 terminators (120Ω resistors) at both ends of the bus to minimize signal reflections. **Troubleshooting**: Check shield continuity with a multimeter if experiencing noise issues. For long runs (>500m), verify signal integrity with an oscilloscope to ensure adequate noise margins. Replace cables showing cracked jackets or corroded conductors.
B2B Procurement Guide
When sourcing RS485-6*0.2 cables: 1. **Certifications**: Look for CE, UL, or RoHS compliance marks. Industrial-grade cables should have UL AWM 20276 or equivalent ratings. 2. **Customization**: Suppliers often offer options like numbered conductors, UV-resistant jackets, or armored variants for harsh environments. 3. **MOQ**: Standard reels are 100m or 305m; bulk purchases (≥1000m) commonly receive 10-15% discounts. 4. **Testing**: Request TDR (Time Domain Reflectometry) reports to verify impedance uniformity, especially for mission-critical applications. Leading manufacturers include Lapp Kabel, Belden, and Prysmian for premium quality, while Asian suppliers like TPC Wire & Cable offer cost-effective alternatives for non-critical uses.
Related Manufacturers
- 主营：通讯线、监控线、双绞线、rs485-2*1.5、rs485-2*0.2、rs485-2*0.3、rs485-2*0.4、rs485-2*0.5、rs485-2*2.5、rs485-2*1.0、rs485-4*0.5、rs485-4*0.2、rs485-6*0.2、rs485-4*2.5、rs485-4*1.0、rs485-4*1.5、rs485总线、rs485-1*2*1、rs485-3*0.3、rs485-3*1.5、rs485电缆、rs485-4*0.75、信号线、syv75-2-1*8、信号电缆
- 主营：RS485、RVSP、RVVSP、MKVV、KVV、CEFR、MHYV、MHYA、JHS、MY、矿用橡套电缆、光缆、MCP、MYP、KVVRP、KVVR、MGTSV、GYTA、GYTA53、MKVV22、矿用阻燃网线、矿用通讯电缆、矿用控制电缆、超五类网线、超六类网线
- 主营：YH电焊机电缆、MHYVP电缆、WD-MKYJY电缆、MCP电缆、YCW电缆、MHSYVP-5、MHSYV-5、MHYSV电缆、MHYS32、MHYA32电缆、MHY32电缆、MHYAV电缆、MGTS-12B光缆、MGTSV-12B、MGXTSV系列、MGTS33系列、MGXTW-12A、MHYBV电缆、MCP采煤机电缆、MVFP系列电缆、WD-MYJY电缆
- 主营：JBQ电机引接线、矿用橡套电缆、通用橡套电缆、JhS防水电缆、船用橡套电缆、CEFR船用电缆、矿用控制电缆、计算机电缆、矿用光缆、MGTSV矿用光缆、电力电缆、MC矿用电缆、MCP矿用电缆、电线电缆、MY矿用移动电缆、MYQ矿用电缆、MYP矿用电缆、MCP采煤机电缆、矿用电缆、视频线、船用电力电缆、屏蔽电缆、YH电焊机电缆、UGF高压橡套电缆、铠装电力电缆
- 主营：纯铜线芯、无氧铜线芯、屏蔽信号线、计算机电缆、矿用通信电缆、津芯同轴电缆、橙色控制电缆、光纤矿用光缆、绞合镀锡铜丝、纯铜通信电缆、矿用信号电缆、计算机屏蔽电缆、高柔性拖链电缆
- 主营：MHYV、MVV、通讯光缆、矿用通讯电缆、RVSP通讯线、EIB照明线、CAT5网线、矿用网线、CAT6网线、MGTSV光缆、MGTS矿用光缆
- 主营：电话线、kff电缆、can总线、视频线、音频线、gs-hrpvsp、485电缆、zr-djyvrp、铠装线、devicenet、电源线、软电缆、数据线、多芯线、jhs电缆、监控线、信号线、控制线、双绞线、hya电缆、现场总线、通信电缆、控制电缆、计算机电缆、铁路信号电缆
- 主营：RS485通讯线、STP-120双绞线、控制线、矿用线、电源线、电话线、屏蔽线、低烟无卤线、消防耐火线、视频线、信号线、ASTP-120屏蔽、RS485-22铠装、阻燃电话线、音频线、广播线、监控线、铁路信号线、组合线
- 主营：钢芯铝绞线、绝缘架空线、全系列光缆、钢绞线、耐热铝合金导线、电力电缆
- 主营：钢芯铝绞线、铝包钢芯铝绞线、镀锌钢绞线、铝包钢绞线、OPGW光缆、全系列金具、耐热铝合金导线、矿用电缆、计算机电缆、橡套电缆、控制电缆、特种电缆、绝缘架空线
- 主营：MKVV、MHYV、HYA、MYQ、KVV、KVVP、铁路信号电缆、矿用电缆、矿用通讯电缆、矿用橡套电缆