产品描术:RS-485通讯电缆特性阻抗为120欧姆,导体为2*24AWG多股绞合镀锡铜丝,PE绝缘介质,由铝箔/聚酯复合带****覆盖+镀锡铜丝90%覆盖共2层屏蔽,附有独立接地导线,工业灰色PVC外护套。

Basic cable: any filled and unfilled cable with a single or double sheath structure.
采用对绞、对屏、总屏(或三线组合、组屏蔽、组屏总屏)等结构形式,具有介质损耗小、传输传号能力强、抗干扰性能好等特点,能可靠地传输微弱的模拟信号,可广泛地应用于发电、冶金、石油、化工、轻纺等部门的检测和控制用计算机系统或自动化装置,以及一般的工业计算机上。
敷设时电缆的温度应不低于0℃,敷设时弯曲半径应不小于电缆外径的10倍。
有铠装层或铜带屏蔽结构的电缆,应不小于电缆外径的12倍。
适用于交流额定电压U0/U=0.6/1KV供电回路中。
电缆导体的最高工作温度为70℃短路时:电缆导体最高温度不超过160℃(持续时间不大于5S)电缆允许弯曲半径不小于15D注:D为电缆外径mm。

Crane or forklift should be used for the loading and unloading of cables. It is forbidden to run flat or lay flat. For installation of large cables, cable laying cart should be used to avoid external damage or abrasion caused by manual dragging. If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight from exploding and water entering the end of the cable. Note: the installation of wire and cable should be familiar with the performance of wire and cable installation personnel or full-time technical personnel, if there are still unclear matters, ball related technical department or technical department of our factory.
PLC是自动化设备开发的核心,是工控中常用控制器,如何系统学习,按照从简单到难的阶段学习,可分为开关量学习、模拟量学习、通讯控制需要掌握上位机(人机界面)的设计。
开关量开关量是最简单的,两种状态,ON和OFF,PLC的基本单元就是开关量控制无论是输入还是输出。
输入按照开关频率可分为低频和高频输入开关,低频开关各类开关按如钮、旋钮、行程开关、接近开关(也可高频),各种继电器等,高频开关就是开关频率很快如脉冲输入编码器。
多芯电缆线芯截面为35mm2及以下者,其线芯应为圆形,线芯截面在50mm2及以上者为扇形、瓦形或半圆形。
四芯电缆中第4芯(中性线芯)可为圆形或扇形。
五芯电缆中性线可为圆形或瓦型6mm2及以下者允许由单根导体构成,10mm2及以上者由多根单线组成。
HBYV、HBV-J、HBZR、HBZR-J、HBYV-J、HBYY、HBVV、HBVV-J、HPV、HBV产品执行标准:参考邮电局YD/T630-93标准.型号:HBYV、HBV-J、HBZR、HBZR-J、HBYV-J、HBYY、HBVV、HBVV-J、HPV、HBV型式代号:HB-室内线代号V。
5、工作参数:单线传输最大规格:1000m,加中继器可延长至10000m西门子PROFIBUS-DP总线电缆6XV1830-0EH10其它介绍:1.借助于其双屏蔽层,尤其适用于安装在易受电磁干扰的工业环境中2.通过总线终端的接地触点的外包层,可实现接地的连续性3.按米销售4.当连接各站时,应确保数据。
BV line, BVR line, RVSP double stranded shielded cable, RVS double stranded cable, RVB parallel line, RV line RVSP Shielded twisted-pair cable RVSP (shielded twisted-pair cable, shielded cable, shielding twisted-pair electric (HYVP, RVVP) RVVP twisted-pair shielded cable < < shielded wire > > is shielded twisted-pair cable RVSP series on the basis of RVS coupled with a layer of copper wire shielding net, so the transmission loss, shielding the outside world better than RVS series, but because of the copper wire shielding network, its cost is also much higher than RVS series. Are often used to those who has a high re on the transmission. Technical indicators: polyvinyl chloride insulated cable long-term allowed working temperature over 70 ℃, the cable temperature under installation should not below 0 ℃, outer diameter (D) is less than 25 The allowable bending radius of mm cable shall not be less than 4 times the outer diameter of the cable. Diameter (D) of 25 mm and above of permissive bending radius of cable, not less than 6 times of cable diameter. The product description: this product is fit for ac rated voltage up to and including 450/750 power, electrical appliances, instruments, instrumentation, telecommunications e, lighting circuit and automatic device fixed installation, connection with a soft line, installed with a soft line and strong with shielded wire, according to the needs of use also can produce this kind of wire and cable fire retardant class (ZR), high flame retardant class (GZR), heat-resistant class (90 ℃, 105 ℃, 200 ℃, 250 ℃), low temperature resistant, nylon sheath, refractory (NH ), the company's main products: power cable control computer cable wire and cable wire and cable we specialized in wire and cable production and sales. Our products are high and low price, complete variety, there are all kinds of wire and cable, domestic orders can be delivery. We will with the high service to your satisfaction. If you have please telephone subscribers.

Solid insulated filled cables are suitable for urban and township telecommunication lines of local telecommunication networks and for special network lines connected to public networks. Mainly used for pipeline laying. The inner and outer surfaces of the cable core and the shield layer are filled with oil paste and poured to prevent water intrusion. The mechanical and electrical properties of the cable remain unchanged under conditions of 30~C - 60~C.
4.485布线可以任意布设成星型接线与树形接线。
485布线规范是必须要手牵手的布线,一旦没有借助485集线器和485中继器直接布设成星型连接和树形连接,很容易造成信号反射导致总线不稳定。
很多施工方在485布线过程中,使用了星型接线和树形接线,有的时候整个系统非常稳定,有的时候则总是出现问题,又很难查找原因,一般都是由于不规范布线所引起的。
对于调速范围较宽的恒转矩负载,如带运输机等,在设定时要考虑在低频率运行时能否带得动负载,应把U/f设置大些。
对于轻负载启动,重负载运行的对象,对转矩可不提升或少提升;对于风机、泵类负载,在低频率时应少提升或者选用弱减特性的曲线。
变频器对转矩提升都设计有“自动”供用户使用,如果设定为自动时,可使加速时的电压自动提升以补偿启动转矩,使电动机加速顺利进行,对于调试经验不足的新手,或者对负载特性不太清楚时,使用“自动”是种不错的选择。
技术特点1.电缆额定工作电压1000v.;2.导体结构采用多层复绞形式,电缆弯曲性能高;3.绝缘护套材料经改性后,具有高阻燃性,氧指数超过32;4.电缆的长期工作温度可达105℃,从而可使电缆载流量比普通电缆提高1.3倍;5.电缆符合IEC332-3《电缆成束燃烧试验》标准规定的A级水平。

综合纽绞铁路信号电缆执行标准GB/T。
室外信号电缆PZYA234CC铁路信号电缆适用于额定电压交流500V或直流1000V及以下传输铁路控制信号、音频信号或某些自动装置用固定敷设的各种电缆。
4、使用特性:电缆在-40℃-+50℃环境下使用。
电焊机电缆的二次对地电压交流本产品用于交流额定电压为450/750V及以下的家用电器、电动工具和各类移动电器设备。
二、使用特性(1)YZ型额定电压Uo/U为300/500V,YC型为450/750V。
在缆芯中和屏蔽层的内外表面用石油膏填充或浇注处理,以防止煤矿中水分侵入。
在煤矿常见的32~C一62~C的环境条件下。
用于平巷、斜巷及机电硐室做通信线以及用于平巷,竖井或斜井作主信号传输。
矿用通信电缆结构介绍:1、导线:退火裸铜线,铜线直径为0.30,0.42,0.52,0.60,0.70,0.80,0.90(mm)。