SCSI交换机

美国SCSI交换（switching）是按照通信两端传输信息的需要，用人工或设备自动完成的方法，把要传输的信息送到符合要求的相应路由上。根据工作位置的不同，SCSI可以分为广域网交换机和局域网交换机。SCSI广域的交换机（switch）就是一种在通信系统中完成信息交换功能的设备。在计算机网络系统中，交换概念的提出改进了共享工作模式。而HUB集线器就是一种共享设备，HUB本身不能识别目的地址，当同一局域网内的A主机给B主机传输数据时，数据包在以HUB为架构的网络上是以广播方式传输的，由每一台终端通过验证数据包头的地址信息来确定是否接收。也就是说，在这种工作方式下，同一时刻网络上只能传输一组数据帧的通讯，如果发生碰撞还得重试。这种方式就是共享网络带宽。

美国SCSI是Small Computer System Interface（小型计算机系统接口）的缩写，使用50针接口，外观和普通硬盘接口有些相似。SCSI硬盘和普通IDE硬盘相比有很多优点：接口速度快，并且由于主要用于服务器，因此硬盘本身的性能也比较高，硬盘转速快，缓存容量大，CPU占用率低，扩展性远优于IDE硬盘，并且支持热插拔

TRAFAG传感器、TRAFAG压力传感器代表型号： 8891.80.3317.0100001934、8891.85.3315.0100001934、8891.77.3317.0100001934、873100663HT41205072……
Trafag pressure transmitter ECE/ECT:TRAFAG pressure transmitter ECE/ECT is now more precise due to both a newly developed calibration procedure and the Trafag in-house developed ASIC: the tighter accuracy band enables the absolute and relative pressure measurement from 0,6 to 40 bar at an accuracy NLH of 0,2% (0,2 to 0,4 bar at an accuracy of 0,3%) or from 1 to 400 bar at an accuracy of 0,5% respectively. 
Owing to the sensor technology “thick film on ceramics” the innovative pressure transmitter ECE/ECT is suitable for various media with years of endurance. The pressure transmitter ECE/ECT has EMC-protection according to IEC 6100. The attractive price-performance ratio, the modular construction, various process connections and output signals as well as high resistance against vibration make the pressure transmitter ECE/ECT the market leader: Highly demanding applications in the industrial sector such as water treatment, hydraulics or machine tools are possible with the cost-effective ECE/ECT, which replace the hitherto offered ECOS/ECOAA.