If you need to include a multilayer switch in your network diagram, this should come in handy. 開關 網路 乙太網 第三層交換器
Programmable Logic Controller with digital inputs and outpus, RS232 serial port, expansion bay for battery and add-on cassettes 可程式設計邏輯控制器 自動化 行業 可程式設計邏輯控制器
