The SINUMERIK OP 012 operator panel front can be used for:

• SINUMERIK 840D:
  SINUMERIK PCU 20/PCU 50.5-C
• SINUMERIK 840D sl:
  NCU 710.2/NCU 720.2/NCU 730.2, SINUMERIK PCU 50.5
• SINUMERIK 840D sl Type 1B:
  NCU 710.3 PN/NCU 720.3 PN/NCU 730.3 PN, SINUMERIK PCU 50.5

The optional SINUMERIK direct key module provides an additional connection of the 2 ? 8 vertical softkeys as direct keys to PROFIBUS DP, if no SINUMERIK Machine Push Button Panel or machine control panel with connection of the direct keys is available.