Siemens 6NH7800-4AA40

The Siemens 6NH7800-4AA40 is a SINAUT ST7 TIM 44 communications processor designed for use with SIMATIC S7-300 and S7-400 systems through an MPI interface. This module provides RS232 and RS485 connections, allowing integration with external modems or wireless devices. It also includes an internal MD4 modem specifically intended for Euro-ISDN communication. Although this product has been discontinued since January 2018, it remains available through BSP Automation for those who require it in existing setups.