RS485接口连接器采用DB-9的9芯插头座，与智能终端RS485接口采用DB-9（孔），与键盘连接的键盘接口RS485采用DB-9(针).RS-485通讯电缆2X0.5 2X0.75 2X1.0 2X1.5RS-485通讯电缆在一般场合采用双绞线就可以，但在要求比较高的环境下可以采用带屏蔽层的双绞。
同样的道理，如果有屏蔽线起到屏蔽作用的话，外部干扰源对于其的干扰影响也可以尽可能的缩小。
3.选择使用普通的超五类屏蔽双绞线即网线就可以。
由于原材料价格上涨，导致现在市场上的线材鱼龙混杂，有不良商人利用某种合金来顶替铜丝来做网线，在外面镀铜以蒙混客户。
当采用75－5同轴电缆时，一般传输距离在300m时，应考虑使用电缆补偿器。
如采用75－9同轴电缆时，摄像机和监视器间的距离在500m以内可不加电缆补偿器。
¬为方便用户参考，将常用同轴电缆尺寸列表如下：表中尺寸均为标称尺寸，欲获取更详细的有关电缆的参数，请参考相关标准或制造商的说明。
Precautions for installation of power cables: keep 2m distance when the cable is installed in parallel with the thermal pipe, and 0.5m should be maintained when crossing. The cable shall be installed at a distance of 0.5m in parallel or across other pipelines. When the cable is directly buried and installed, the direct buried depth of 1-35kv cable is less than 0.7m. When 10KV and below cables are installed in parallel, the net distance between them shall not be less than 0.1m and 10-35kv shall not be less than 0.25m. The distance of cross installation is not less than 0.5m. Cable laying temperature lower than 0 ℃, bending radius: multi-core cable or 15 (D + D), a single cable 20 or more (D + D), (D for cable diameter, D) for the conductor diameter. ? 6KV and above cable connector:? When installing the terminal head of the cable, the semiconductor electrical shielding layer must be stripped off. During operation, the insulation shall not be damaged. The shield end should be flat and the graphite layer (carbon particles) should be clean. (2) plastic cable end copper tape screened and armor must be good grounding, the short circuit also follow this principle, avoid unbalanced three-phase run ShiGang armoured end produce inductive electromotive force, and even "lighter" and sheath and other accidents. It is required to use my tinplate to braid copper wire for grounding lead. When connecting with the cable copper belt, it should be welded with chromium-iron tin. ? The shield of three-phase copper tape should be connected with ground wire respectively. Note that the shielded ground wire and steel armor ground wire should be separately drawn out and insulated from each other. The position of the welded ground wire should be as low as possible. Basic re for cable terminals and intermediate joints: a. good conductor connection; B. The insulation is reliable, and it is recommended to use irradiated cross-linked heat-shrinkable silicone rubber insulation materials; C. good sealing; D. sufficient mechanical strength to meet various operating conditions. The end of the cable must be used to prevent water and other corrosive materials from corroding, in order to prevent the water tree caused by the aging of the insulation layer and breakdown. 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.
产品型号:KVVRP2-22--ZR-KVVRP2-22--ZR-KVVP2-22-R。
产品展商:天津市电缆总厂第一分厂简单介绍：专业生产:KVVRP2-22--ZR-KVVRP2-22--ZR-KVVP2-22-R铜芯绝缘和护套铜带屏蔽钢带铠装（阻燃）控制电缆。
个导磁体夹着1个永磁体，转子的齿位置互相相差1/2齿节距。
转子的磁通从N极出发，经过气隙最小处（定转子齿相对的地方）到定子磁路，再返回转子的S极，磁路如箭头所示。
上图左侧的转子上部，右侧的转子下部产生吸引力，轴两侧产生力矩（此力是不平衡电磁力），转子的旋转受定子激磁线圈切换产生旋转力。
轴承的间隙会很容易产生振动。
实际上定子主极为8个极，转子齿数为偶数，目的是消除此不平衡电磁力。
实际上与2个转子齿部相对的定子,在轴向上并非是分开成两个，而是采用硅钢片叠压而成一体。
产品标准：Q/NHN使用特性：•交流额定电压：UO/U450/750V•电缆长期允许工作温度：-25℃~+105℃及-60℃~+200℃两种.•耐火特性:符合GB规定:A类:火焰温度950℃-1000℃B类:火焰温度750℃-800℃燃烧时间90min燃烧时间:90min附加电压。
ZR-KVVP2铜芯绝缘和护套铜带屏蔽（阻燃）控制电缆。
ZR-KVVRP2-22铜芯绝缘和护套铜带屏蔽钢带铠装（阻燃）控制电缆。
电缆使用环境温度-40℃~+50℃，电缆敷设温度≥-10℃，在25℃时的温度≤95%，电缆敷设时弯曲半径：MHYV31、MHYVR型电缆≥10倍电缆外径其余型号电缆≥15倍电缆外径。
④坡度灯。
即目视进近灯坡度指示系统或精密进近航道指示器。
由多个在垂直方向上发出红白颜色的、界限分明的光束的灯具组成，帮助驾驶员检查和修正飞机的进入坡度。
⑤跑道入口灯。
装在跑道入口即着陆跑道端的边界上，发出绿光并成一横线,标志跑道入口。
带钢丝绳PVC行车控制电缆使用特性:额定电压：U0/U0.6/1KV及以下最高工作温度：70℃最低环境温度：固定敷设-40℃度规格型号为KVVRC3,4,6,8,9,,19×6MM2最常用的是：KVVRC2*114*。
MT《煤矿用阻燃电缆阻燃性的试验方法和判定规则》及Q/TX《煤矿用塑料绝缘控制电缆》MKYJV电缆,MKYJVP电缆,MKYjVP2电缆,MKYJV22电缆,MKYJV32电缆,MKYJVR电缆,MKYJVRP电缆,MKYJVP22电缆等规格型号的煤矿用阻燃控制电缆，推荐电缆芯数为2,3,4,5,7。
This is the flame retardant of a single cable. Test rules, a 60 cm long specimen vertically fixed on the wall before the metal cabinet, flame length is 175 mm of propane fixed end 450 mm from the top of the samples from the position of flame cone and cable with 45 degree Angle, if damaged part sample distance lower fixed end no more than 50 mm, through. Iec 60332-3/ bs40666-3 flame retardant rating (bunched wire or cable vertical)
从这3点出发，MSP430系列单片机就是一个很好的选择。
该单片机目前在电子行业已经使用多年，一直都作为低功耗单片机的**产品;该单片机所有的型号都具备官方范例代码，有较多的参考案例;最后，MSP430单片机在中国通过大学计划推广了多年，大量的大学生使用这款单片机完成实验、参加竞赛，积累了很多的书籍教材和网络资料，开发板类型也很丰富，TI提供售价约为几十元人民币的LaunchPad开发板。
ia-K2YVR本安型PE绝缘PVC护套二芯绞合屏蔽控制软电缆适用于要求柔软的场合。
适合于具有防爆保护要求及其他恶劣环境下集散系统、自动化检测系统中作传输线，安全性能明显高于一般DCS电缆和计算机控制电缆。
信号电缆分为：铁路信号电缆，PVC绝缘信号电缆，控制信号电缆，矿用信号电缆铁路信号电缆用途：适用于额定电压交流500V或直流1000V及以下传输铁路信号、音频信号或自动信号装置的控制电路，其中综合护套、铝护套铁路信号电缆具有一定的屏蔽性能，适宜于电气化区段或其它有强电干扰的地区敷设。
最高传输频率分别为30MHz与100MHz。
ia-K2YVR本安型PE绝缘PVC护套二芯绞合屏蔽控制软电缆适用于要求柔软的场合。
还可定做行车控制电缆，柔性控制电缆，扁平控制电缆等特种电缆。
我厂生产的产品有：，矿用橡套电缆。
产品名称型号规格及范围：塑料绝缘和聚氯乙烯护套铁路信号电缆PTYAH,;PTYA;PZYA;PTYV;PTYY,;PTY22;PTY23;（PZY02;PZY03;PZY23PZY22）1/0.8mm（1/1.0mm）2-48芯适用于额定电压交流500V或直流1000V及以下的铁路信号联络、火警信号。