Industrial 100-2223-01B Circuit Board Card

The 100-2223-01B is an ADC HiGain remote-unit circuit board (HRU-402) designed for use within ADC’s HiGain remote system architecture. It functions as the HiGain remote unit and provides an RS-232 DCE serial interface for local maintenance and console access, including VT-100 terminal emulation for direct management sessions. The board uses a card-edge connector for insertion into a compatible HiGain shelf and is designed with a dedicated circuit-ground reference to ensure reliable signaling in industrial environments. RS-232 I/O options on this remote unit include DB-9 and DB-25 variants, reflecting the standard DCE configuration used for serial connections to maintenance terminals or host equipment. The 100-2223-01B identifier (with related variants such as 100-2223-01B-03) marks this specific remote-unit circuit board within the HiGain family, clarifying compatibility and replacement in service documentation and catalogs.