PROFIBUS is an open, digital communication system with a wide range of applications, particularly in the fields of factory automation and process automation. PROFIBUS is suitable for both fast, time-critical applications and complex communication tasks. The PROFI-8455 is one of the PROFIBUS DP series products produced by ICP DAS. It provides the PROFIBUS DP communication protocol with any DP-Masters. The new revised PROFI-8455 provides 4KV ESD protection contacting for all terminals at front-panel, and reduces the product volume efficiently. By applying the PROFI-8455, users can easily establish a PROFIBUS DP network with other DP-Masters. In addition, we also provide many kinds of I-8K and I-87K I/O modules with the PROFI-8455. In advance, it can be used in the application of building automation, remote data acquisition, environment control and monitoring, laboratory equipment & research, factory automation, etc.