Spin cassette XF5-273 communication cable transfer box, adopting advanced technology at home and abroad, in accordance with the international advanced standard production in the eighty s of cable wiring equipment, for the city, the town of telecommunication network backbone cable and wiring cable transfer. Features: 1. The connection jumper adopts rotary clamp-type connection and is sealed with silica gel on the metal clip, because it is not only reliable and durable, but also easy to operate and repair without stripping. 2. The wiring terminals in the handover box shall be arranged in 25 pairs as a basic unit, consistent with the basic units of the local telephone cables and marked with Numbers on the terminals to facilitate construction and maintenance. 3. The structure, arrangement and installation dimensions of the wiring modules are exactly the same as those of 3M products and can be used for each other. 4. The box body is treated by electrostatic spraying, beautiful and generous, with clear lines, good anti-corrosion and waterproof performance and long service life. Main technical parameters: the environment temperature: - 40 ℃ ~ + 65 ℃ atmospheric pressure: 70 ~ 106 kpa relative humidity: 95% or less is random ends and insulation resistance between terminals and ground > 5 x 104 Μ Ω. When connecting any two ends and any terminals and grounding to 1000V ac, there shall be no breakdown or flying arc in 1min. Contact resistance between wire and terminal < 5 x lO - 3 Ω.
VV22VLV22聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆 敷设在室内、隧道及直埋土 壤中，电缆能承受压力和其他外 。
Flame retardant performance: under specified test conditions, specimen was burning, after removed test of ignition, flame spread only in a limited range, residual flame or residual burning characteristics of self extinguishing reaction in the limited time.
Outdoor big manufacuring HYA logarithmic audio cable, communication cable in the city (main technical indicators manufacuring HYA HYAC HYA22 HYA23 HYA53 execution: YD/T322-2013 | | program-controlled subscribers cable has used 25 on ground communication cable communication cable | 600 for communication cable; Municipal telephone cables, data cables, program-controlled cables; Communication cables; Wire and cable; Communication cables, Hebei langfang supply large logarithmic communication cable: outdoor multi-cores cable - multi-cores cable - big logarithmic manufacuring HYA communication cable USES logarithmic cables, HYA53 multi-cores cable, HYAT multi-cores cable, HYAT53 multi-cores cable, HYA22 multi-cores cable, HYA23 multi-cores cable, HYAC53 multi-cores cable, HJVV multi-cores. Outdoor large logarithmic communication cable, such as HYA5, 10, 20 to 25 to 30 pairs, about 50, 100, 200 for the telephone cable: manufacuring HYA, HPVV, HYAC, HYAT, HYA53: three kinds of 1 00 pairs of large logarithmic cables: large logarithmic cables HYA53/HYAT53 (rodent proof/direct embedding) Cable core diameter? Large insulation eccentricity (mm)? Insulation compressive strength (N)? Hinge pitch (mm)? Near end crosstalk attenuation? Far end crosstalk defense?
订货须知：1.订货时应注明产品名称、标准、型号、格号、数量及额定电压；2.交货长度、时间；3.其它特殊要求 低烟低卤、低烟无卤阻低烟低卤、低烟无卤阻燃绝缘控制燃绝缘控制BV线、BVR线、RVSP双绞屏蔽电缆、RVS双绞线、RVB平行线、RV线RVSP屏蔽双绞电缆RVSP(屏蔽双绞线,屏蔽电缆,屏蔽双。
大多数PLC都是用这些字母表示的，应用最广泛的西门子plc是用单词简写表示，比如DC/DC/RLY就分别表示电源输入输出的类型，很显然RLY表示是继电器输出。晶体管输出可以发出高速脉冲，一般是控制伺服，分PNP和NPN两种接法。晶闸管输出可以直接接交流负载，一般很少用。我们用的最多的就是继电器输出，和我们平常用的继电器是一摸一样的。它****，可接交直流负载，它仅仅是一个触点，所以不分NPN和PNP。
该条件均适用于U0和U值。当用于直流系统时，该系统的标称电压应不大于电缆额定电压的1．5倍。注：系统的工作电压允许长时间地超过该系统标称电压的10%。如果电缆的额定电压至少等于该系统的标称电压，则电缆可在高于额定电压10%的工作电压下使用。
Flexible cable RVVT, RVV RVVTP resistance to bending RVVPT RVVT detail TRVV flexible cable, cable RVVTP RVVPT bending resistant cable type: TRVV connection and control using the flexible cable, widely used in dry or wet indoor, reciprocating bend free mobile no compulsory pull drag chain system. 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
1、额定电压450/750v 2、电缆导体的长度允许工作温度为70摄氏度 3、电缆的敷设温度应不低于0摄氏度，推荐的允许弯曲半径； 4、无铠装层的电缆，应不小于电缆外径的6倍 5、有铠装或铜带屏蔽结构的电缆，应不小于电缆外径的12倍。
每个单位都采用规定色谱的扎带绕带100对及以上电缆加有1%的备用线对，但最多不超过10对；8.缆芯包带：缆芯外包覆非吸湿性、非吸油性的绝缘带；9.电缆屏蔽：用轧纹(或不轧纹)双面涂塑铝带纵包于缆芯包带之外，两边搭接粘合；10.电缆护套：黑色低密度、中密度或高密度聚乙烯；11.识别标记：电缆外表面打印。
电缆导体的长期允许工作温度-40～+50℃； 月平均最大相对湿度为≤95%（+25℃时） 电缆允许附设与安装的温度应不大于-10℃ 电缆最小弯曲半径：MHYV、MHJYV型电缆为电缆外径的10倍，其它型号的电缆为外径的15倍。
KVVP聚氯乙烯绝缘，聚氯乙烯护套铜丝编织屏蔽控制电缆敷设在室内、电缆沟中、管道及地下，具有防干扰能力KVVP聚氯乙烯绝缘，聚氯乙烯护套软控制电缆敷设在室内移动要求柔软等场合。KVVRP聚氯乙烯绝缘，聚氯乙烯护套铜丝编织屏蔽软控制电缆同上具有防干扰能力。
如何编写出质量较高的plc程序，首先我们得创建一个属于自己的编程构架或者是程序分段，把整个程序分成几部分，比如我自己在写一个设备的PLC程序时会分成5部分：手动部分、自动部分、数据处理、通信部分、模拟量/数字量转换，尽量编程采用结构化编程的方法，这样能对程序进行分段处理，无论是简单工程还是结构化功能都可以采用。手动部分的作用是机械设备单个动作的控制一般用于测试以及维修方面，自动部分则是整个动作完整的流程编写，数据处理则是对手动、自动用到的数据进行传送、选择、计算等操作，通信部分是用到Modbus等通信控制元器件如变频器、伺服等装置编写的通信程序，模拟量/数字量则是采用模拟量控制元器件进行的DA转换程序或者采集模拟量数据进行的AD转换程序。
●产品品牌：天联●执行标准：企业标准●产品用途变频电缆主要用于变频电源和变频电机之间连接用的电缆，以及额定电压1KV及以下的输配电线路中，作输送电能用。●适用范围： 适用于干燥或潮湿的室内，无强应力缓释或强制引导的自由连续往复运动下的安装，工业使用环境下的弯曲场合，如木工机械、机床加工设备、物流输送系统、起重机场合等，对电磁屏蔽抗干扰好。
实验规定试样保持垂直，用试验用的喷灯燃烧（30，000TU/Hr）15秒钟，然后停止15秒钟，反复5次。合格标准为余火焰不可超过60秒钟，试样不可烧损25%以上，垫在底部的外科用棉不可被落下物引燃。UL1581-VW-1和IEC类似，只是燃烧的时间不同。
矿用电力电缆用途：本产品为煤矿用额定电压1KV及以下固定敷设用电缆，适用于煤矿井下的电力传输。矿用电力电缆用途：本产品为煤矿用额定电压1KV及以下固定敷设用电缆，适用于煤矿井下的电力传输。矿用电力电缆使用条件：线芯长期允许工作温度为65℃，电缆敷设温度不低于0℃，电缆允许最小弯曲半径为15（D+d）±5%。
试验规定，一根60cm长的试样垂直固定在前壁开通的金属箱内，火焰长度175mm的丙烷燃烧器从距试样的上部固定端450mm的位置上火焰锥和电缆以45度角接触，如果试样燃烧损坏部分距离固定端下部不超过50mm，测试通过。