The Crosfield Electronics 7334-4000P Interface Master Board is the master interface module for Crosfield’s 7334-series systems. It is specified as the 7334-4000P/7334-5000P Interface REM Master Board and carries the USNP designation. As the interface master, it serves as the central interface component for the 7334-4000P and 7334-5000P configurations.
