The NET-2S Network Adapter Board provides a network ribbon cable connector for means of interfacing the riser Network Data Lines (NET A & NET B) to network modules. The NET-2S provides terminals for connection of the riser Network Data Lines and a ribbon cable connector that can support up to any ten network modules that require a Network Ribbon Cable. The NET-2S Network Adapter Board also provides AC Fail and Low Battery terminals to monitor up to three PS6A or PS6B power supplies. An On/Off Power Switch, Technician GND Test Clip and Seven Segment Diagnostic LED are also included. A cabinet door tamper switch input is also provided.