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。
执行标准Q/CF006阻燃耐火特性试验执行GB标准使用特性1.交流额定电压：U0/U0.6/1KV最高工作温度：硅橡胶绝缘180℃，氟46绝缘有200℃和260℃两种，聚氯乙烯绝缘70℃，交联聚乙烯90℃。
合理的结构设计，严格的选材，精良的生产加工，严格的质控程序，保证产品在实际应用中效果良好。 阻燃软电缆RVVZ型红、黄、蓝、绿、黑、黄绿双色(接地用)适用范围该电缆广泛应用于邮电、铁路、化工等行业的输配电系统，特别适用于机房配电系统的内部连接线,也可作为移动电缆使用。
2.电缆敷设安装允许弯曲半径；室内使用时应不小于电缆外径的25倍；室外使用时应不小于电缆外径的10倍。而且电缆的抗干扰性能高、电气性能稳定。保证了传输信号参数的准确性和控制系统的安全运行。本产品适用于石油、化工等部门的本质安全型设备及系统，它不仅能靠地传输微弱的模拟信号和数字信号。
6、对称的三芯电缆结构设计，具有比四芯电缆更好的传输性能。变频电缆的设计变频装置的节能效果十分明显，在大功率电机中采用变频调速电机，整个发电机组可节电30%。并且使用变频调速后，实现了电机的软启动，使电机工作平稳，电机轴承磨损减小，延长了电机使用寿命和维护周期。
基本方法继电器电路图是一个纯粹的硬件电路图，将它改为PLC控制时，需要用PLC的外部接线图和梯形图来等效继电器电路图。可以将PLC想象成是一个控制箱，其外部接线图描述了这个控制箱的外部接线，梯形图是这个控制箱的内部“线路图”，梯形图中的输入位和输出位是这个控制箱与外部世界联系的“接口继电器”，这样就可以用分析继电器电路图的方法来分析PLC控制系统。在分析梯形图时可以将输入位的触点想象成对应的外部输入器件的触点，将输出位的线圈想象成对应的外部负载的线圈。
Armored communication cable mechanical protection layer: type 53 adopts 0.15mm thick corrugated steel belt, which is longitudinal wrapped on the basic cable and overlapped on both sides. The surface of the steel belt is coated with plastic to prevent corrosion and water intrusion.
Self-supporting full-plastic cable (HYAC) : self-supporting full-plastic cable has two kinds of concentric structure and calabash structure. The commonly used HYAC full-plastic cable is calabash structure. Wire: annealed bare copper wire with diameter of, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9; Color the insulation line according to the full chromatographic standard. A single insulated wire is twisted in pairs at different pitch to minimize crosstalk and a specified chromatographic combination is used to identify pairs of wires. Cable core: the cable core structure is based on 25 pairs of cables. More than 25 pairs of cables are assembled according to the unit. Each unit is wrapped with the unit of specified chromatogram to identify different units. More than 100 pairs of cables plus 1% of the reserve pair. Shielding: the shielding layer is made of corrugated metal tape which is wrapped vertically on the outside of the cable core wrap belt and firmly bonded on both sides. The metal strip of the shielding layer is coated with plastic film to facilitate bonding with the sheath to prevent corrosion of the shielding layer. Protective sleeve: protective sleeve is black low density polyethylene, can use double protective sleeve according to the need.
说的通俗些铠装电缆也就是地埋的电线电缆，动力线传输电能电缆加上铠装层的目的除了增强抗拉强度、抗压强度等机械保护延长使用寿命外，铠装的有一定的抗外力性能，还可以放一些老鼠撕咬，不至于透过铠装造成电力传输问题，铠装的弯曲半径要大，铠装层可以接地保护电缆：计算机铠装电缆、计算机屏蔽铠装电缆：双屏双绞铠装电。
电缆允许的弯曲半径：对有铠装或铜带屏蔽结构的电缆应不小于电缆外径的12倍。对有屏蔽层结构的软电缆，应不小于电缆外径的6倍。对无铠装层的电缆应不小于电缆外径的6倍。本产品是阻燃类产品。二、执行标准 MT818.《煤矿用阻燃通信电缆》及企业标准Q/JG。
屏蔽层：镀锡铜丝高密度编织,屏蔽层覆盖率85%；西门子现场总线|西门子总线电缆6XV1830-0EH10导体:裸铜丝,1*0.64mm导线面积：>0.34mmW线芯颜色:绿色-红色屏蔽层:铝塑带+镀锡铜丝编织护套:PVC3DRX22X02R特性阻抗:150Ω直流电阻:57.5Ω/km工作温度:-30。
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?
具体方法如下：将万用表拨在R×100或R×1K档上。红笔接触某一管脚，用黑表笔分别接另外两个管脚，这样就可得到三组（每组两次）的读数，当其中一组二次测量都是几百欧的低阻值时，若公共管脚是红表笔，所接触的是基极，且三极管的管型为PNP型；若公共管脚是黑表笔，所接触的是也是基极，且三极管的管型为NPN型。判别发射极和集电极由于三极管在制作时，两个P区或两个N区的掺杂浓度不同，如果发射极、集电极使用正确，三极管具有很强的放大能力，反之，如果发射极、集电极互换使用，则放大能力非常弱，由此即可把管子的发射极、集电极区别开来。
煤矿用控制电缆 MKVVMKVV22MKVV32MKVVRMKVVRP MKVVP煤矿用控制电缆产品执行标准：MT煤矿用控制电缆用途：本产品适用于交流额定电压u0/u为450/750V及以下的控制监控回路及保护线路和配电装置中电器仪表的连接线。
The total shielding structure can adopt copper wire and copper band combination shielding, copper wire braid shielding, copper wire braid shielding, copper wire braid shielding, etc. The shielded cable of this structure can resist electromagnetic induction, poor grounding and power line, reduce inductance and prevent the induction electromotive force from being too large.
YJV交联聚乙烯绝缘聚氯乙烯护套电力电缆VV22聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆敷设在地下，电缆能承受机械外力作用，而不能承受大的拉力。YJV32交联聚乙烯绝缘细钢丝铠装聚氯乙烯护套电力电缆VV33聚氯乙烯绝缘细钢丝铠装聚乙烯护套电力电缆敷设在地下，竖井、水下，能承受较大拉力。
2、电缆长期工作温度：-20oC~65oC3、电缆敷设温度不低于0OC，弯曲半径不小于电缆外径的10倍。阻燃性能在规定试验条件下，试样被燃烧，在撤去试验火源后，火焰的蔓延仅在限定范围内，残焰或残灼在限定时间内能自行熄灭的特性。