100X2X0.4阻燃铠装通信电缆雨山有限公司****ZR-KVVR3X1.0单怄气
Dc resistance: 20 ℃ and 0.4 mm copper wire, less than or equal to 148 Ω/km, 0.5 mm copper wire, less than or equal to 95 Ω/km.
普通网线UTP、STP,严格来说也是不能满足RS485协议的传输要求。撇开网线的机械强度、耐环境性能不说,只说电性能,一般网线的特性阻抗通常为100欧姆,而RS485要求的匹配阻抗必须在120欧姆以上(个别的如ProfiBus则达到150欧姆)。
我们采用多股细绞和精绞成束细一级无氧铜丝作导体,符合DINVDE0295等级6,绝缘选用PVCT12符合DINVDE0281之第1部分,PVC护套TM2符合DINVDE0281之第1部分,并做特殊的结构设计、机械及电气电气性能计算和使用场合模拟试验。
HPVV配线通信电缆。描述:电缆用全色谱的实心聚乙烯绝缘,经过绝缘的导线被扭绞成线对,由线对绞合成缆芯。电缆缆芯外加上适宜的缆芯包覆材料,聚氯乙烯护套。结构:导线无氧铜线,高密度聚乙烯绝缘,聚氯乙烯护套,并按照全色谱标明绝缘线的颜色。
DJYJV(R)P2交联聚乙烯绝缘铜带绕包总屏聚氯乙烯护套计算机用屏蔽(软)电缆。DJYJP2V(R)交联聚乙烯绝缘铜带绕包分屏聚氯乙烯护套计算机用屏蔽(软)电缆。DJYJP2V(R)P2交联聚乙烯绝缘铜带绕包分屏总屏聚氯乙烯护套计算机用屏蔽(软)电缆。
但就有没有人能说出电的形状、颜色、大小、重量来,这种看不见、摸不着的概念是抽象的。对于抽象的知识只要理解即可,不需要深究,否则进去了就不容易出来了.比如对于电压、电动势、电位、电流、电阻等,只要了解其概念,知道其单位,掌握测量方法就可以了.至于具体的研究方法、内部结构等,都用处不大,现在就不要学习,等以后有能力时间的时候再去学习。再举个例子,我们电工学的第1章里,有个电理的计算公式R=pl/s告,它可以算出导线的电阻.刚开始做电工时,笔者认为这个公式很有用,但其实在实际工作中几乎用不到这个公式,笔者已经做了三十多年电工,一次都没有用过.在实际的工作中,导体是用它的截面积来表示的.实际的工作中是不问导线电阻的,而是问导线的平方数的,问多少平方的导线能够通过多大的电流等。
芯线数:2—5芯,7—36芯(CCC目录外产品,无CCC认证)。截面积:0.75-2.5mm²,0.5、2.5—35mm²(CCC目录外产品,无CCC认证)。测试电压:2000V,5min。
产品型号:HYAHYACHYATHYYHYVHYY23HYV23HYYT23HYA23HYAT23HYATC主要产品:充气电缆,自承式架空电缆,充油电缆,填充型电缆,屏蔽电缆,非屏蔽电缆 HYA电缆_充气电缆的相关产品HYA电缆_充气电缆HYAHYACHYA23铠装通信电缆HYV22HYA53。
Armoured twisted-pair shielded cable | RS485 ASTP dedicated cable CAN be used in low speed, short, no ordinary twisted pair, on the other hand, at high speed, long transmission, it must adopt impedance matching (usually 120 Ω) of RS485 special cable (STP - 120 Ω (for RS485 & CAN) one pair 18 AWG), but also should be used under harsh type sheathed twisted-pair shielded cable (ASTP - 120 Ω (for RS485 & CAN) one pair 18 AWG).
RVVP3铜芯聚氯乙烯绝缘和护套铝塑复合带屏蔽软电力电缆敷设在室内、电缆沟、管道等要求有屏蔽的固定场合。RVVP-22铜芯聚氯乙烯绝缘和护套编织屏蔽钢带铠装软电力电缆敷衍设在室内、电缆沟、管道、直埋等能承受较大机械外力等固定场合。
型号、名称型号名称敷设方式DJYVP铜芯聚乙稀绝缘聚氯乙稀护套铜丝编织总屏蔽计算机电缆固定敷设DJYPV铜芯聚乙稀绝缘聚氯乙稀护套铜丝编织分屏蔽计算机电缆DJYPVP铜芯聚乙稀绝缘聚氯乙稀护套铜丝编织分屏蔽及总屏蔽计算机电缆DJYVRP铜芯聚乙稀绝缘聚氯乙稀护套铜丝编织总屏蔽软芯计。
Computer shielded cable; Purpose: high voltage insulation with small interface constant. Use to ground, and the screen, the total screen (or three quad twisted, group screening, group screen a total screen), such as structure form, with a small dielectric loss, the transmission ability is strong, resistant performance is good wait for a characteristic, can reliable transmission weak analog or digital, can be widely used in electricity, metallurgy, petroleum, chemical, textile sites detection and control of the door or by computer automation instrumentation, and general industrial computer. Relevant technical indicators: reference BS5308 IEC189 and British second, product code 1 and code the DJ - (series code) electronic computer shielded cable Y - (insulation code) high-pressure polyethylene F - (insulation code) fluoroplastic V - (sheath code) polyvinyl chloride (R - said many strands of soft wire core P - (block code) copper mesh shielding P1 tin plated copper mesh shielding P2 copper tape screened P3 aluminum-plastic composite membrane shielding for example 1:3, product specifications order 7 (14) to 1.0 was computer shielded cable can be represented as: (1) total shielding DJYVP7 * 2 * 1.0mm2 (2) partial shielding multiple strands of soft line DJYPVR7 * 2 * 1.0mm2 (3) total shielding type DJYPVP7 * 2 * 1.0mm2 Type (1) packet shielding DJYPV3 x 3 x 0.75 was (group 2) screen a total screen DJYPVP3 x 3 x 0.75 was three, model name and use range model name using range DJYVPDJYPVDJYPVP total shielding polyvinyl chloride polyethylene insulating sheath computer cable shielding polyvinyl chloride polyethylene insulation group sheathed electronic computer cable shielding total shielding polyvinyl chloride polyethylene insulation group sheathed electronic computer cable 1, fixed for laying indoors, in cable trench or pipe 2, cable long-term working temperature: - 20 ℃ + 65 ℃, the cable laying temperature is lower than 0 ℃, the bending radius should not less than 10 times of cable diameter DJYVPR DJYPVR DJYPVRP total shielding polyvinyl chloride polyethylene insulating sheath computer with a soft cable shielding polyvinyl chloride polyethylene insulation group sheathed computer with a soft cable shielding total shielding polyvinyl chloride polyethylene insulation group with a soft cable sheath computers shows that: (1) flame retardant cable (oxygen index greater than 30) need to add code "out" in front of the model. For example, zr-djypv zr-djypvp et al. (2) armored (steel belt armored) cables need to add code "22" in the lower right corner of the model, such as: DJYPV22 djypvpppvp22, etc. The cable is mainly used for ac or dc 300V or below and can work normally when 500V or below.
FX1N/FX2N/FX3U即可以作为主站,也可以作为远程设备站使用。此种通讯因为要加CC-LINK通讯模块,所以成本较高。在CC-LINK网络中还可以加入变频器伺服等符合CC-LINK规格的设备。N:N网络连接N:N网络连接连接图如下:1)通讯对象为FX1S、FX1N、FX1NFX2N、FX2NFX3U、FX3UC系列PLC之间。这些PLC最多可以连接8台。在这个网络中可以通过由刷新范围决定的软元件在各PLC之间执行数据通讯,并行可以在所有的PLC中监控这些软元件。
电动葫芦电缆-电动葫芦专用电缆-电动葫芦带丝绳专用电缆用途:本产品具有柔软、耐磨、防油等特性,线旁附钢丝绳,增强抗拉力。适用于交流额定电压0.6/1KV及以下的行车、台车、传输机械等移动电器用动力传输线及控制、照明、通讯线路,本产品已广泛应用于冶金、电力、船舶、港口等行业。
生产规格:对数5对—3600对导体直径为:0.4、0.5、0.6、0.7、0.8(mm)电缆对数型号(0.4)型号(0.5)型号(0.6)5对HYA5x2x0.4HYA5x2x0.5HYA5x2x0.610对HYA10x2x0.4HYA10x2x0.5HYA10x2x0.620对。
本安信号控制电缆具有低电容和低电感,并具有极好的屏蔽性能和抗干扰性能,因而防爆性能优于一般计算机缆和控缆。1、电缆型号、名称及使用范围型号名称使用范围ia-K2YV本安型PE绝级、PVC护套二芯绞合屏蔽控制电缆固定敷设在室内、电缆沟或管道中。
因为RS485接口组成的半双工网络,一般只需二根连线,所以RS485接口均采用屏蔽双绞线传输。在使用RS485通讯时,对于特定的传输线路,主机(召测设备)到仪表的485口间的电缆长度与数据信号传输的波特率成反比;这个长度主要受信号的失真以及噪声的影响所影响。