ABB SPNIS21 Symphony Plus NIS21 Network Interface Slave Module (Upgraded successor to legacy INNIS21 Bailey INFI 90 network card)

e & Function Description ABB SPNIS21 Symphony Plus NIS21 Network Interface Slave Module (Upgraded successor to legacy INNIS21 Bailey INFI 90 network card)ABB Group Official Function Description SPNIS21 is an intelligent microprocessor-based communication slave module exclusively for ABB Symphony Plus / INFI 90 DCS power plant control racks. It acts as a dedicated gateway between Harmony Control Units (HCUs), local I/O racks, and the plant-wide INFI-NET / Cnet high-speed control token ring network. Official Function Description SPNIS21 is an intelligent microprocessor-based communication slave module exclusively for ABB Symphony Plus / INFI 90 DCS power plant control racks. It acts as a dedicated gateway between Harmony Control Units (HCUs), local I/O racks, and the plant-wide INFI-NET / C