ABB SD821 3BSC610037R1仓库备货PLC/DCS模块

产品详情资料

极限值为：Tp/2=0.6 Tp（正常）大值Tw=0.188 Tp（标准）小值这些测量值可在评估未指定电缆的大长度时进行。光纤链路的色散问题小得多，因为介质的带宽更宽，因此失真更小。传播延迟传播延迟是由信号沿电缆的传播时间引起的。数据级电缆的典型信号速度约为光速的65-78%。这需要大约3微秒才能行驶一辆2000英尺长的公交车。这大约是153.6Kb的半比特时间。这种偏斜可能会影响总线访问序列，因为在相邻地址的传输之间通常只分配一位安静的总线（跳过）时间。信号必须在一位周期内到达总线上的所有设备。即使在理想介质中，传播延迟也会导致总线长度的极限。通过光纤的传播速度与导线的传播速度没有显著差异，必须考虑通过接口的延迟。A-6 VersaMax™ System Genius®网络接口单元用户手册The limits are: „ Tp/2 = 0.6 Tp(normal) maximum „ Tw = 0.188 Tp(normal) minimum These measurements can be taken when evaluating the maximum length of an unspecified cable. Dispersion is much less of a problem with fiber optic links since the media is much wider bandwidth, and therefore has less distortion. Propagation Delay The propagation delay is caused by travel time of the signal down the cable. Typical signal velocity in data grade cables is around 65- 78% of the speed of light. This requires about 3 microseconds to travel a 2000 foot long bus. This is about half a bit time at 153.6 Kb. This skew could affect the bus access sequence since only one bit of quiet bus (skip) time is usually allocated between transmission of adjacent addresses. The signal must reach all devices on the bus within the period of one bit. Propagation delay causes the ultimate limitation in bus length, even with ideal media. Propagation speed through fiber optic is not significantly different than wire, and delays through the interfaces must be accounted for. A-6 VersaMax™ System Genius® Network Interface Unit User's Manual

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主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。

主营产品各种模块/卡件，控制器，触摸屏，伺服驱动器。

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●使用前:

在操作和维护，安装设备之前，请阅读并严格遵守安全相关的信息。

Read and strictly follow safety-related information before operatingmaintainingand installing equipment.

●使用者要求:

必须从事安装，组装或维护设备等相关工控电气机械以及其他相关技术的人员。

Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:

应用于品牌本系列工业以及生产生活自动化设备产品。

Used in the brand of this series of industriaand production automation eauipment products

适用于场景:系统集成，非标定制，产线升级改造，原设备电气替换等等。

Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.

●操作人员:

应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强，熟悉安全信息和安全实施:

熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。

Equipment should be installed,operated and maintained by trained operators from the brand

●危险情况

警告

.请注意使用人员的人身安全。

●除了产品特性以及功能，还需了解产品的使用寿命环境。

●充分学习产品使用手册，否则非专业人员可能会造成人身危险。

Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.

●服务行业

适用水泥，木业，石业，橡胶，石油，化工，发电，环保，水处理，制冷，交通，钢铁，食品，饮料，船舶，制冷等行业

Applicable to cementwood,stone,rubber,petroleumchemical, power generation,