| Product overview |  | | I/O modules of KY-302, 303 series are high-performance I/O modules produced by our company based on ten years of industrial meter manufacturing experience and technology, fully considering the actual needs of data acquisition on the site, and adopting the latest microelectronics and micro processing technology. The collected or controlled data are communicated with the upper computer through RS485 bus. The communication protocol is MODBUS (RTU), which adapts to various configuration software. Users can easily build their own data acquisition and control system by selecting multiple different I/O modules, or they can be used together with PLC as the I/O module of computer acquisition and control system, or as a programmable front-end device, which can be directly integrated into the user's specific system. This series of I/O modules have distinctive characteristics and can be widely used in metallurgy, petrochemical, power, telecommunications, railway, coal, gas, aviation, military, building, tobacco, food, wine, light industry, environmental protection, water treatment, laboratory, scientific research and teaching fields. | | | |