The following components can be connected to the SINUMERIK 840D sl:

• SINUMERIK operator panel front with TCU
• SINUMERIK PCU 50.5 Windows 7
• SINUMERIK Machine Control Panels MCP and Machine Pushbutton Panels MPP
• SIMATIC Comfort Panels, SIMATIC Mobile Panels and SIMATIC Thin Client Panels
• SINUMERIK handheld units
• Distributed PLC I/O via PROFIBUS DP or PROFINET IO
• SINUMERIK PP 72/48D PN and PP 72/48D 2/2A PN I/O modules
• SINUMERIK Analog Drive Interface for 4 axes, ADI 4
• SINAMICS S120/SINAMICS S120 Combi drive systems
• SIMOTICS feed and main spindle motors
• Probe systems
  (The use of high-precision probes such as those from RENISHAW's RENGAGE range is recommended)