Compact Switch Module CSM 1277 for connecting SIMATIC S7-1200 and up to 3 additional participants to Industrial Ethernet with 10/100 Mbit/s, unmanaged switch, 4 RJ45 ports, ext. DC 24V power supply, LED diagnostics, S7-1200 module including electronic device manual on CD-ROM. SCALANCE CSM 1277 Compact Switch Module, Unmanaged Switch, 4x 10/100 Mbit/s RJ45 ports for connecting SIMATIC S7-1200 to IECreation of simple, cost-effective automation networks.Cost-effective construction of small, local Industrial Ethernet networks compared to using an external network component saves installation costs and installation space. Possibility of flexible expansion of the network by simply plugging in the CSM. Fast commissioning as no configuration is necessary, as well as simple and fast status display via LED on the device. Use of uncrossed connecting cables possible thanks to the integrated autocrossover function. Compact switch module for connecting SIMATIC S7-1200 and up to 3 additional participants to Industrial Ethernet with 10/100 Mbit/s, unmanaged switch, 4x RJ45 ports, external DC 24 V. The system is supplemented by various RJ45 connectors, an IE FC Outlet RJ45 and various cable variants.