Video transmission usually adopts direct modulation technology and takes the form of baseband (about 8MHz bandwidth). The common transmission medium is coaxial cable. Coaxial cable is specially designed for transmitting video, and its loss, image distortion and image attenuation are all relatively small, which can well complete the task of transmitting video.
Insulation resistance: each conductor and the rest of the grounding wire core, the control cable is more than 10000 m Ω. Km, more than 3000 m Ω HYAT cable. Km.
DJVP2V(R)P2-22聚氯乙烯绝缘铜带绕包分屏总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。
DJVV(R)P3-22聚氯乙烯绝缘铝塑复合带绕包总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。
1, code 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 1:2, 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 soft lines DJYPVR7 * 2 * 1.0mm2 (3) total shielding DJYPVP7 * 2 * 2 * 1
Plastic insulated control cable: GB9330-88 scope of application: this product is fit for ac rated voltage up to and including 450/750 control, monitoring circuit and protection circuit using features: 1, the conductor long-term allowed working temperature is 70 ℃. 2, when laying environment temperature 0 ℃ or higher. 3. Minimum bending radius: 4. For unarmored cable, it shall be no less than 6 times the outer diameter of the cable. 5. The cable with armor or copper shield shall not be less than 12 times the outer diameter of the cable. 6. The soft cable with screen shielding structure shall not be less than 6 times the outer diameter of the cable.
仪表工作电源的选用优先选用交流220伏，尽量不选择交流380伏。
温度仪表的安装1.仪表工作环境不要超过50度，尽量远离热源，相对湿度不超过85％，无腐蚀性气体。
不要把仪表安装在振动太大的地方，以免影响其寿命。
仪表应安装在操作和读数方便的位置。
大部分仪表无电源开关和保险丝，应根据情况加装。
仪表输入信号线与仪表电源线、负载控制线不要捆扎在一起，更不能放在同一根金属管内，以免电磁波干扰。
热电偶输入，应使用对应的补偿导线。
Cable temperature under installation should not below: polyvinyl chloride sheathed cable 0 ℃, silicon rubber sheathed cable - 20 ℃, fluorine plastic sheath cable - 20 ℃.
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.
Our company strictly implements the system of self-inspection, mutual inspection and special inspection. Un semi-products are strictly prohibited from entering the next process, and un products are not allowed to leave the factory. Organize the production strictly according to the standard or the special technical re of the customer, and provide **** products to the customer.
PVV：聚氯乙烯绝缘聚氯乙烯护套信号电缆PYV：聚乙烯绝缘聚氯乙烯护套信号电缆PVV22：聚氯乙烯绝缘聚氯乙烯护套钢带铠装信号电缆PYV22：聚乙烯绝缘聚氯乙烯护套钢带铠装信号电缆软芯控制信号电缆：软芯控制信号电缆用途:适用于额定电压U0/U450/750V及以下控制、监视回路及保护线路的连接线，主。
产品特性 1、具有较小的绝缘介质损耗，具有优良的热老化性能； 2、具有较强的耐电压冲击性，能经受高速、频繁变频时的脉冲电压； 3、具有良好的屏蔽性能，其屏蔽传输阻抗在100MHz范围以内不大于1Ω/m； 4、电缆结构紧凑、圆整，用电安全性高，对称的三加三电缆结构设计，具有比四芯电缆更稳定的传输性。
产品型号及名称 ZR-DJYPV计算机电缆：聚乙烯绝缘铜丝编织分屏蔽聚氯乙烯护套阻燃型电子计算机用电缆 ZR-DJYVP计算机电缆：聚乙烯绝缘铜丝编织总屏蔽聚氯乙烯护套阻燃型电子计算机用电缆 ZR-DJYPVP计算机电缆：聚乙烯绝缘铜丝编织分屏蔽、总屏蔽聚氯乙烯护套阻燃型电子计算机用电缆 ZR-D。
plc和dcs在工业自动化控制中占有举足轻重的地位，而工业自动化控制是国家工业发展战略的核心。
PLC以及DCS在工业控制的各个环节中不断的升级、完善，已经成为现代工业生产制造中不可或缺的工具。
DCS和PLC的定义DCS控制系统，在国内自控行业又称之为集散控制系统。
即所谓的分布式控制系统，是相对于集中控制系统而言的一种新型计算机控制系统，它是在集中控制系统的基础上发展、演变而来的。
DCS作为一个集过程控制和过程监控为一体的计算机综合系统，在通信网络的不断带动下，DCS系统已经成为了一个综合计算机，通信、显示和控制等4C技术的完整体系。
6、有屏蔽结构的软电缆，应不小于电缆外径的6倍。
『煤矿用额定电压1KV及以下铜芯固定敷设聚氯乙烯绝缘电力电缆（MT』一、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。
二、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%。
Power cable installation considerations, characteristics and operation condition 1, power cable installation considerations for cable laying parallel with heat pipe installation to keep a distance of 2 m, when crossing, should keep 0.5 m. 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.
领取了以M开头的新型号MA标志证书。
产品在全国几十个煤业集团及矿山上使用，获得了较高的评价和赞誉。
行车用专用电缆产品用途：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。
适用于交流额电压450/750V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。
2、可根据需要生产钢带铠装本安型号控制电缆，需在型号右下角加注代号“22”，如ia-K2YVV22表示钢带铠装。
3、需阻燃型加特征代号“ZR”如ZR-ia-K2YY等。
允许以不短于20米的短段交货，其数量不超过交货长度的10%；2、根据双方协议，可以任何长度的电缆交货。