欣谕真空冷冻干燥机的PLC控制系统优势

欣谕真空冷冻干燥机所有需要控制和调节的仪器都安装在两个各自D立的柜子中：电气柜用于电气系统，控制柜用于仪表和控制系统。控制柜与电气柜通过15 米的连接电缆连接（不提供电缆桥架）。额外的电缆需付费。PC 机配有6 米电缆用于RS232 与PLC 的连接，提供更长的需额外付费。如电缆长度超过15米，需要将通讯协议更换到RS422。 控制系统包括一个记录仪及打印机。

All the required control and regulating devices are installed in two separate cabinets: a power cabinet for the electrical system; a control cabinet for the instrumentation & control system. The control cabinet is connected to the power cabinet by 15m of interconnecting cable (cable trays are not provided). The PC is provided with 6m of cable for RS232 connections to the PLC. Optional longer cables can be provided, which makes the communication protocol change to RS422, for cable lengths over 15m. A recorder and printer are provided as standard with the control system.

设备的各部件都连接到电气柜的接线端子上。提供接线端子的编号确认。电气柜包括确保安全操作所必须的元件，如主电源连接及隔离，与现场电源匹配，变送器及控制电源。控制电压24V DC 用来Z大程度确保系统安全。

Equipment components are connected to terminals in the power cabinet and ready for use. The terminals are numbered to provide a clear identification. The power cabinet includes all the necessary components to ensure the safe operation of the plant, including main power connections and isolation, to match the local supply, transformers and power supplies for control. Where practical skid control voltages are 24V DC to maimize system safety.