Siemens 6NH7800-4AD20

The Siemens product 6NH7800-4AD20 is a SINAUT ST7 TIM 42 D communications processor designed for use with the SIMATIC S7-300 and S7-400 automation systems. It features an MPI interface along with RS232 and RS485 connections, allowing integration with external modems or wireless devices, and includes an internal modem MD2. Although this model has been discontinued since early 2018, it remains a notable component for its communication capabilities. BSP Automation continues to provide support and supply for this product, ensuring availability for those maintaining existing systems.