The CSM 1277 compact switch module offers all advantages of the SIMATIC S7-1200 design:

• Compact design;
  the rugged plastic enclosure contains:
  • 4 x RJ45 ports for connecting to Industrial Ethernet
  • 3-pole plug-in terminal strip for connection of the external 24 V DC supply on the top
  • LEDs for diagnostics and for status display of the Industrial Ethernet ports
• Simple mounting on the mounting rail of the S7-1200
• Fanless and consequently low-maintenance design
• The module can be replaced without using a programming device