5、工作参数：单线传输最大规格：1000m，加中继器可延长至10000m西门子PROFIBUS-DP总线电缆6XV1830-0EH10其它介绍：1．借助于其双屏蔽层，尤其适用于安装在易受电磁干扰的工业环境中2．通过总线终端的接地触点的外包层，可实现接地的连续性3．按米销售4．当连接各站时，应确保数据。
矿用电缆选择矿井供电系统中，高压供电线路一般都采用铠装电缆，其故障率相对低压供电所采用的[1]要少得多。
采区供电是供电系统中的薄弱环节，工作环境又较差，如何选择电缆的型号与截面，关系到供电运行的安全。
MHY32型弯曲半径不小于电缆直径的15倍。
2.绝缘颜色：3.3线芯为一根红色一根蓝色，0.85线芯为一根白色一根绿色，白色线芯外绕包一层铝箔。
3.绝缘厚度：3.3线芯绝缘厚度为0.5，绝缘后外径为3.5毫米。
Rated voltage 600/1000v cross-linked polyethylene insulated polydilute hydrocarbon sheath flame-retardant class B fire-resistant low-smoke halogen free cable, 3 cores, 240mm2, expressed as wdzbn-yjy 600/1000v 3*240 Q/ tec16.05-2005;
控制、监控回路及保护线路，电器仪表、配电装置的信号传输、控制与测量的使用。
在一30~C一60~C的环境条件下，自承式电缆的机械和电气性能保持不变。
自承式通信电缆执行标准：YD/THYAC自承式通信电缆用途：适用于本地电信网的城市与乡镇电信线路，也适用于接入公用网的专用网线路。
相激磁驱动：1相激磁驱动定子齿与转子齿作位置定位。
相对2相激磁，由定子的2个相绕组激磁，转子齿磁场与定子磁场平衡，作位置定位。
因1相激磁驱动时，其误差精度为各定子相的本身机械精度，而2相激磁误差，由多极位置决定，误差有所缓解，精度变好。
特别是纵列型的两相PM型步进电机，1相激磁与2相激磁比较，1相激磁精度会差一些。
多步进位置定位：两相步进电机时以2或4步进位置定位驱动；三相步进电机3或6步进位置定位驱动。
RVVSP shielded twisted-pair cable, used in the field lines, electrical instrumentation, telecommunications, broadcasting, anti-theft alarm system, building intercom system, video monitoring system, electronic equipment and automation devices such as shielding line. (transmission RS485 signals /) our factory new micro sales letter, micro signal: 15075619608 QQ is not convenient to micro letter contact! Conditions of use 1: using temperature (℃) : - 40 ~ 60 + 2: relative humidity: 98% at 40 ℃ 3: install the laying temperature is not low, such as: 15 ℃ 4: allowed minimum bending radius: indoor is not less than five times, 10 times outdoor structure 1:2: tinned copper wire line core PVC insulated/twisted-pair cable 3: film around the package/tin copper wire mesh grid block 4 PVC sheathed rated voltage: 300 v / 300 v, 300 v / 300 v with a standard: GB/T5023-1997 RVVP cable series: Can achieve 2 core to 24 core, line diameter has: 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0, etc. (zr-rvvsp flame retardant),(nh-rvvsp fire resistance),(wdz-rvvsp low smoke halogen free) special model can be produced as required
采用对绞、对屏、总屏（或三线组绞合、组屏蔽、组屏总屏）等结构形式，具有介质损耗小，传输信号能力强、抗干扰性能好等特点，能可靠传输微弱模拟信号或数字信号，可广泛地用于发电、冶金、石油、化工、轻纺等部门的检测和控制用计算机系统或自动化仪表装置，以及一般的工业计算机用。
Eisc-ss flame-retardant and explosion-proof essential cable eisc-ss-r flame-retardant. The main technical indicators of this company are compiled by referring to the information of IEC227 (1979) and British BS5308Part1. Purpose: this product is mainly used for laying places of essential requirements with rated ac voltage of 450/750v or less, strong anti-rf and anti-near field coupling ability. It is also suitable for distribution and transmission of essential circuits in industrial sectors with gas operation. Conditions of use: 1)? The rated voltage is 450/750v. 2)?? Cable conductor long-term allowed working temperature is 70 ℃. 3)?? The cable temperature under installation should not below 0 ℃, allowed recommended no armoured cable bending radius should not less than 6 times of cable diameter. The armored cable shall not be less than 12 times the outer diameter of the cable.
IA-DJVPVRIA-DJYPVRIA-DJYJPVR本安型、编织分对屏蔽（铜丝或镀锡丝）软结构。
IA-DJVP2VRIA-DJYP2VRIA-DJYJP2VR本安型、铜塑复合膜分对屏蔽软结构。
IA-DJVP3VRIA-DJYP3VRIA-DJYJP3VR本安型、铝塑复合膜分对屏蔽软结构。
(2)短路时，(最长持续时间不超过5s)电缆导体的最高温度不超过160℃。
双绞屏蔽线RVSP2、产品介绍：RVSP系列在RVS的基础上再加上一层铜丝屏蔽网，常被用于那些对传输的信号要求很高的场合。
常被用于那些对传输的信号要求很高的场合。
产品具有耐油、防水、耐磨、耐酸碱基各种化学试剂和各种腐蚀性气体、耐老化、不燃烧等优异性能；本产品主要适用于发电、冶金、石油、化工等工矿企业在高温、低温和酸、碱、油、水及腐蚀性气体的恶劣环境中作电器仪表及自动化控制系统的传输线。
前两天做了一个小的改造项目，需要使三菱Q系列plc和一块LED显示屏进行数据通讯，LED显示屏经改造后支持RS232和RS485接口的MODBUS协议，PLC侧安装有一块型号为QJ71C24N-R2的通讯模块，查此模块资料可知道此模块提供两个RS232物理接口CH1的CH2，可进行基于串口的无协议通讯，唯独不能支持MODBUS协议。
考虑到成本问题，不打算更换硬件，最后经过查询资料和验证后，最终实现MODBUS协议通讯。
使用条件：防水电缆线长期允许工作温度65℃。
产品适用于潜水泵，煤矿，水下作业，水中景光灯等水处理设备，该产品采用高密度胶具有防水等功能用途：本产品用于计算机和自动化设备连接用电缆，它具有抗干扰、信号衰减小等性能。
HYAC- cableway communication cable - detailed introduction of chromatographic combination for identification. Self-supporting cable core structure: taking 25 pairs as the basic unit, more than 25 pairs of cables are assembled according to the unit, and each unit is designated as the unit binding band of chromatogram in order to identify different units. 100 pairs or more of cables plus 1% of the reserve pair. Self-supporting cable core tape: wrapped with polyester film tape. Self - bearing cable shield: with or without corrugated metal strip longitudinal package cable core belt, both sides lap. The plastic film coated on the surface of the shielding belt and the bonding of the protective layer claim to be cable sheath: black low density polymer. Messenger messenger wire: suspension wire for 7 strands galvanized steel ridge, nominal diameter of 6.3 mm and 4.75 mm, its tensile strength is not less than 3000 kg and 1800 kg respectively, suspension wire with thermoplastic paint coating, to prevent corrosion of steel wire. Messenger cable identification and marking: cable exterior sex identification mark, mark at no more than alternate 1 m intervals, tag contents are: the diameter of wire, line number, cable type, factory name and year of manufacture, marking at no more than alternate 1 m intervals to mark on the surface
MHYV（PUYV）：聚乙烯绝缘聚氯乙烯护套煤矿用信号电缆用于矿场作普通信号传输，适用于固定敷设。
MHYVRP：聚乙烯绝缘铜丝编织屏蔽聚氯乙烯护套煤矿用信号电缆，用于电场干扰较大的场所作信号传输，电缆较柔软。
产品标准GB参照IEC227标准型号、名称及使用范围型号额定电压名称使用条件ZRA-KVVZRC-KVV450/750V0.6/1KV聚氯乙烯绝缘聚氯乙烯护套阻燃控制电缆要求阻燃固定敷设于室内、电缆沟、托架及管道中，或户外托架敷设ZRA-KVVPZRC-KVVP聚氯乙烯绝缘聚氯乙烯护。