The SIPLUS S7-1500 CPU 1511-1 PN RAIL has:

• A powerful processor:
  The CPU achieves command execution times as low as 60 ns per binary instruction.
• A large work memory:
  150 KB for program, 1 MB for data
• SIMATIC Memory Cards as load memory;
  permit additional functions such as datalog and archives
• Flexible expansion capability:
  single-tier configuration with max. 32 modules (CPU + 31 modules)
• PROFINET IO IRT interface for connecting distributed I/O via PROFINET