SIMATIC S7-1500 / ET 200MP, active backplane bus 12 slots for plugging in S7-1500 I/O modules for hot-swapping, for use in the ET 200MP with IM 155-5 PN HF (from FW V4.4.1), please order S7-1500 mounting rail and slot covers separately SIMATIC ET 200MP is a modular, scalable and universally applicable I/O system in IP20 and offers the same system advantages as the S7-1500. It allows the shortest bus cycle times and the fastest response times even with large quantities. The decentralized I/O system is particularly easy to install, wire and commission. The scalable design allows you to tailor the I/O station precisely to the specific needs on site.