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The outer conductor knitting is usually 60%-80% suitable. The mould design and processing for insulation production are also key. It should ensure that the product reaches the ideal uniform structure and the equivalent interface constant meets the design requirements.
In addition, once the halogenated body reacts with the water in the air, it will generate "halogenated hydrogen acid", which will seriously corrode equipment and buildings and cause "secondary disasters".
充油通信电缆型号100对200对300对50对HYAT电话电缆HYVHJVVHYY配线电缆型号HPVVZR-HPVV局用电缆型号HJVVHJVVPZR-HJVVZR-HJVVP铠装通信电缆型号HYA53WDZ-HYA53ZRC-HYA53填充式铠装通信电缆型号HYAT53WDZ-HYAT53ZRC-。
TRVV flexible cable for connection and control, widely used in dry or damp indoor, reciprocating freely bending and moving the chain system without forced tension. Such as machine tool processing equipment, logistics delivery system, port machinery, complete equipment installation engineering. Product features: according to customer requirements, color core or coding core. High quality PVC mix is adopted to reduce the requirement of cable outer diameter for installation space. The designed cycle bending life is 5 million times, and the actual use has exceeded 6 million times. Cable structure: conductor: using multi-strand fine ground and other fine twisted into a bundle conductor oxygen-free copper wire, conform to DIN VDE 0295 grade 6 insulation: high quality PVC mixture color: color line core or coding line core 3 core + yellow or green conductor sheathed: high quality PVC mixture color: black, grey, orange electrical characteristics: rated voltage U0 / U < 0.5 was 300/300 V p o. 5 was 300/500 V test voltage: 3000 V U meet DIN VDE 0281 part 2 temperature range: ℃ mobile installation: fixed installation: - 5 ℃ ~ + 70 ℃ and 30 ℃ ~ + 70 ℃ when continuous movement, the minimum bending radius: 7.5 x cable diameter
不同的PLC能实现的功能不一样，有些功能PLC内是集成的而有些是需要外加扩展的，那么就要根据不同的控制对象去选用了。
掌握好该阶段是可以大大提高PLC的程序，还需掌握PLC以外的其他自动化知识，如伺服、变频器等等。
此阶段重点需在：1.了解系统构成需要；合理选择扩展单元；学习扩展单元使用方法，可以完成特殊的系统设计，该阶段的学习要一定的实际条件才能完成。
五.网络阶段随着自动化技术的发展由PLC做下位机的应用也十分多见。
可以采用任何一种方式敷设，更适用于岩石地区的直埋敷设。
镀锡铜线产品特性 ：1、 镀锡铜线拥有极之优良的可焊性。
2、 随着时间变化，可焊性仍保持良好，可长期储藏。
3、 表面平滑、光亮、润泽。
4、 性能稳定可靠，确保优质、高产。
(如计量测试、信号显示、自测遥测、计算机联网、报警等)产品型号：KVV22硬芯聚氯乙烯绝缘聚氯乙烯护套铠装控制电缆KVVR22软芯聚氯乙烯绝缘聚氯乙烯护套铠装控制电缆KVVP22硬芯聚氯乙烯绝缘聚氯乙烯护套屏蔽铠装控制电缆KVVRP22软芯聚氯乙烯绝缘聚氯乙烯护套屏蔽铠装控制电缆应用标准：GB933。
工作参数：单线传输最大规格：1000m，加中继器可延长至10000m芯紫色电缆6XV1 830 0EH10是我厂的主要产品之一，我厂专业生产2芯紫色电缆：编程电缆6XV1 830 0EH10，天津市电缆总厂第一分厂年产量达几十万公里，2芯紫色电缆6XV1 830 0EH10销量居国内首位。
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ZR-kJYP3V-ia(ZR-KJYP3V22-ia)本安电路用聚乙稀绝缘铝塑复合带绕包对绞屏蔽(钢带铠装)聚氯乙稀护套控制电缆ZR-kJYPVP-ia(ZR-KJYP3VP-ia)本安电路用聚乙稀绝缘铜丝编织(铝塑复合带绕包)对绞屏蔽铜丝编织总屏蔽聚氯乙稀护套控制电缆2、规格型号对数。
ZR-kJYP3V-ia(ZR-KJYP3V22-ia)本安电路用聚乙稀绝缘铝塑复合带绕包对绞屏蔽(钢带铠装)聚氯乙稀护套控制电缆ZR-kJYPVP-ia(ZR-KJYP3VP-ia)本安电路用聚乙稀绝缘铜丝编织(铝塑复合带绕包)对绞屏蔽铜丝编织总屏蔽聚氯乙稀护套控制电缆2、规格型号对数。
plc使用与继电器电路图极为相似的梯形图语言，如果用PLC改造继电器控制系统，根据继电器电路图来设计梯形图是一条捷径。
这是因为原有的继电器控制系统经过长时间的使用和考验，已经被证明能完成系统要求的控制功能，而继电器电路图又与梯形图有很多相似之处，可以将继电器电路图“翻译”成梯形图，即用PLC的外部硬件接线图和梯形图有很多想似之处，继电器系统的功能。
这种设计方法一般不需要改动控制面板，保持了系统原有的外部特性，操作人员不用改变长期形成的操作习惯。
Manufacturing technology of frequency converter cable: in the production process of special cable for frequency converter motor, the core extrusion process and cable forming process are the most critical processes. The quality of the insulation core in the extrusion process of the insulation core will directly affect the electrical energy of the cable.
Low smoke halogen free cable All the value of the halogen ≦ 50 PPM (PREN 14582) according to regulations after low produce halide body content of < 100 parts per million (according to the regulations EN5067-2-1) halide produced by the body after low PH ≧ 4.3 after soluble in water, weak acid) (EN - 50267-2-2) according to regulations and hid products in an airtight container through a beam of light after the light transmittance ≧ 60% (according to regulations, EN - 50268-2) low Pb < 90 PPM, +, Hg, Cd, Cr6, PBBs, PBDEs are less than 5 PPM