因RS485接口具有良好的抗噪声干扰性，较长的传输距离和多站能力等上述优点就使其成为**的串行接口。
因为RS485接口组成的半双工网络，一般只需二根连线，RS485接口均采用屏蔽双绞线传输。
尤其适用于计算机集散控制系统。
MHYVR煤矿用聚乙烯绝缘聚氯乙烯护套通信软电缆用于矿场作普通信号传输,可移动使用。
MHYVP煤矿用聚乙烯绝缘编织屏蔽聚氯乙烯护套通信电缆用于电场干扰较大的场所作信号传输,使用于固定敷设。
MHYVRP煤矿用聚乙烯绝缘编织屏蔽聚氯乙烯护套通信软电缆用于电场干扰较大的场所作信号传输,电缆较柔软。
RS485 cable product description: Characteristic impedance of 100 ohms, conductor is 2 * 2 * 24 awg multi-strand tin electrolytic copper wire twisted and become, insulating sheath like installation of design and color recognition, overall **** aluminum foil/polyester belt shielding, additional independent stranded tinned copper wire grounding conductor, industrial gray PVC outer sheath, the standard 1 to RS - 485 communication cable, the characteristic impedance of 120 ohms, conductor is 2 * 24 awg stranded tinned copper wire, PE insulation, covered with aluminum foil/polyester composite with **** + 90% tin plated copper wire cover, double shielding with independent grounding conductor is RS - 485 communication cable.
四、规格：、HYAT、HYA53、HYAT53导体标称直径0.40.50.60.70.80.9芯数5×2、10×2、20×2、30×2、50×2、100×2、200×2、300×2、400×2、GHYAT53导体标称直径0.50.60.70.91.2芯数1×42×。
■常规型号：常用型号为24AWG，26AWG，有1线对、2线对、3线对、4线对，特殊要求可定做导体有0.2mm2、0.5mm2、0.75mm2集散型仪表信号电缆为计算机控制电缆的升级换代产品，用于电子计算机为主的自动控制系统。
负载为感性时，所选额定输出电压必须大于两倍电源电压值，所选产品的阻断(击穿)电压应高于负载电源电压峰值的两倍。
如在电源电压为交流220V、一般的小功率非阻性负载的情况下，建议选用额定电压为400V-600V的SSR产品；但对于频繁启动的单相或三相电机负载，建议选用额定电压为660V-800V的SSR产品.额定输出电流和浪涌电流；额定输出电流是指在给定条件下(环境温度、额定电压、功率因素、有无散热器等)所能承受的电流最大的有效值。
4.屏蔽通信电缆工作电容：平均值52±2nF/km5.屏蔽通信电缆远端串音防卫度：150kHZ时指定组合的功率平均值大于69dB/km。
HYAT实心绝缘填充型电缆用途：实心绝缘填充型电缆适用于本地电信网的城市与乡镇电信线路，也适用于接入公用网的专用网线路。
获得MA标志产品；井筒信号电缆|井下电缆井下电缆MHYA对）MHY对）MKVV芯）获得煤安证的产品：井筒信号电缆MHYV（1-10对）MHYAV（5-100对）MHYA对）MHY对）MHYVP（2-10对）MHYVRP（2-10对）MKVV（2-61芯）MKVV芯）MKV。
Low smoke halogen free power cable is suitable for transmission power in power lines with rated voltage of 0.6/1kv and below. The low-smoke halogen free cable is produced by our company according to the French RCCE and NF series, GB/T18380, GB/T19216, GB/T17651, GB/T17650 and so on.
型号名称MVV煤矿用聚氯乙烯绝缘聚氯乙烯护套电力电缆MVV22煤矿用聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆MVV32煤矿用聚氯乙烯绝缘细钢丝铠装聚氯乙烯护套电力电缆MV42煤矿用聚氯乙烯绝缘粗钢丝铠装聚氯乙烯护套电力电缆概述：耐火电缆是指在火焰燃烧情况下能够保持一定时间安全运行的电缆。
RVVS. RVSP. RVS control signal twisted-pair cable RVVS, RVSP, RVS control signal twisted-pair cable RVSP22RVSP22 armoring is shielded twisted-pair cable RVSP22 armoured shielded twisted-pair cable. RVVS. R RVSP RVSP shielded twisted-pair cable (shielded twisted-pair cable, shielded cable, shielding twisted-pair cable VSP. The RVS control signal twisted-pair cable RVVPS RVVSP ZR - RVVPS ZR - RVVSP RVSP ZR - RVSP shielding with type soft cable manufacturer in detail Model :RVVPS RVVSP zr-rvvps zr-rvvps VSP RVSP zr-rvsp specifications: 2 x 0.5 2 x 0.75 2 x 1.0 2 x 1.5 0.5 4 x 4 x 4 x 4 x 4 x 2.5 1.5 1.0 0.75 0.5 2 x 2 x 2 x 2 x 0.75 2 x 2 x 2 x 2 x 1.0 2.5 RVVPS RVVSP ZR - RVVPS ZR - RVVSP RVSPZR - RVSP copper core PVC insulated jacket soft cable shielding with type, rated voltage 300 v / 300 v. Double stranded shielding line RVSP2, product introduction: RVSP series on the basis of RVS plus a layer of copper wire shielding net, often used for those transmission signal high demand occasions. RVSP shielded twisted pair; RVSP shielded twisted-pair cable RVSP (shielded twisted-pair cable, shielded cable, shielding twisted-pair cable shielded twisted-pair armoured cable, and can provide shielded twisted-pair armoured cable technology consulting and shielded twisted-pair armoured cable structure size of shielded twisted-pair armoured cable - shielded twisted-pair armoured cable daqo - large enterprise specialized in the production of shielded twisted-pair armoured cable shielded twisted-pair armoured cable - shielded twisted-pair armoured cable daqo - specializing in the production of shielded twisted-pair armored cable. The. Panasonic connected the cable RVVSP6*2* 0.2mm.
Flame retardant grade: D for fire temperature: 815 ℃ or higher for fire time: 20 min into a bundle of cable laying nonmetallic material volume: acuity 0.5 litres/m carbonized height: 2.5 meters or less self-extinguishing time: 1 h or less.
跳跃闭锁继电器线圈的电压。
跳跃闭锁继电器的电流线圈中的电压降应校验操作回路额定电压的5%，电压线圈动作值不大于操作回路额定直流电压的70%，保证操作直流电源在规定范围内波动时，TBJ可靠动作，TBJ电压动作值应不小于操作回路额定直流电压的50%，以保证操作回路直流电源接地时，保护不会误动作。
这也是TBJ电气检验中必须要检验的一个项目之一。
跳跃闭锁继电器绝缘性能。
跳跃闭锁继电器的电流线圈无电气联系的各导电部分之间，能承受工频2000V电压，时间为1分钟，所有导电部分对安装架之间，能承受工频2000V电压，时间1分钟。
In manufacuring HYA communication cable, mine cable, mine communication cable, communication cable, mine cable, mine, mine control cable, cable for mine monitoring, mine monitoring cable, mine remote sensing cable, control cable, computer cable, flame retardant cable, fire-resistant cable,? Local communications cables, railway cables, communications e such as the power cord, communication cable in the city the main products are: manufacuring HYA, HYAT, HYAC, HYA22, HYA23, HYAT23, HYA53, HYAT53, ZRC - manufacuring HYA, ZRC - HYAT, WDZ - manufacuring HYA, ZRC - HYA23 series, such as product model complete specifications, has passed the holding center communication e network access license, constant standard logo certification, selling telecom company, has become many communication e supporting products, agreement is well received by customers and trust!
绝缘材料：高密度聚乙烯或乙／丙共聚物，绝缘线的颜色符合全色谱标准。
绝缘线对：二根不同颜色的绝缘线按不同的节距扭绞成对，采用规定的色谱组合以便识别。
缆芯结构：以25对为基本单位，超过25对的电缆按单位组合，每个单位用规定色谱的单位扎带绕扎，以便识别不同的单位。