Siemens 6GK1551-1AA00 Interface Module for Profibus

Siemens CP5511 PCMCIA Card (6GK1551-1AA00) is a 16‑bit PCMCIA Type II interface that provides PROFIBUS DP connectivity from a PG or notebook PC to a PROFIBUS or MPI network. This SIMATIC NET module is designed for PC‑based engineering, commissioning, diagnostics, and maintenance on older Siemens S7 fieldbus installations, linking a portable device to the PROFIBUS bus via a 9‑pin SUB‑D connector using a supplied adapter. The card’s PCMCIA form factor enables plug‑in operation in compatible laptops or instruments with a PCMCIA slot and is documented to support Windows 2000/XP Professional configurations (PCMCIA 32‑bit). The 6GK1551‑1AA00 identification places this module within Siemens’ CP5511 communications family, a solution used when direct PC access to PROFIBUS or MPI networks was required for programming, monitoring, or testing PLCs and field devices. In practice, CP5511 bridges modern portable equipment with legacy PROFIBUS networks, enabling data exchange and diagnostic access without a dedicated PLC port or external gateway.