电类专业英语教学课件word作者汪建宇课.docVIP

Text 17 Installing the S7-200 S7_200的安装 The S7-200 equipment is designed to be easy to install. You can use the mounting holes to attach the modules to a panel, or you can use the built-in clips to mount the modules onto a standard (DIN) rail. The small size of the S7-200 allows you to make efficient use of space. S7_200设备是易于安装,可以通过安装孔固定到板上,或者可以通过固定夹安装到标准定位上.因为S7_200的面积很小,所以你可以充分利用空间. 1. Guidelines for Installing S7-200 Devices You can install an S7-200 either on a panel or on a standard rail, and you can orient the S7-200 either horizontally or vertically. 1. S7_200安装方法 你可以把S7_200安装到板上或安装到标准的栏位上,同时你可以把它放成水平或坚直的. 1) Separate the S7-200 Devices from Heat, High Voltage, and Electrical Noise As a general rule for laying out the devices of your system, always separate the devices that generate high voltage and high electrical noise from the low-voltage, logic-type devices such as the S7-200. 把S7_200 远离热源、高压、电磁噪声 通常，在安排系统部件布局时，要把高压与高电磁噪声部分与低电压与逻辑电路部分（如S7_200）分开来放置 When configuring the layout of the S7-200 inside your panel, consider the heat-generating devices and locate the electronic-type devices in the cooler areas of your cabinet. Operating any electronic device in a high-temperature environment will reduce the time to failure. 当把S7_200放置到板上时,要考虑发热的器件与把电磁器件定位到你系统盒里的闲置区中.在高温的环境下操作任何的电子器件都会让器件缩短寿命. Consider also the routing of the wiring for the devices in the panel. Avoid placing low voltage signal wires and communications cables in the same tray with AC power wiring and high-energy, rapidly-switched DC wiring. 同样要考虑设备的在板上的布线情况,避免低压的信号线和通信信号线与高压的交流电和高能量.快速的DC切换线走同一个方向 2) Provide Adequate Clearance for Cooling and Wiring S7-200 devices are designed for natural convection cooling. For proper cooling, you must provide a clearance of at least 25 mm above and below the devices. Also, allow at least 75 mm of depth. 为降温与配线提供足够的间隙 S7_200 针对自然对流冷却而设计.为了得到足够的降温效果,就要在这个器件的的上方和下方留有最少25mm的间距.同时,要有75mm的深度. Tip: For vertical mounting, the maximum allowable ambient temperature