Combining CPU with I/O in one enclosure, Simatic S7-1511C is 85 mm wide with 32 digital IO ports and bit performance of 60 ns, while S7-1512C is 110 mm wide with 64 digital IO ports and bit performance of 48 ns. Both can be expanded to include additional connections using signal modules if required. Functions such as metering, measuring, and positioning are integrated into hardware. For integrating into networks, both models have Profinet connection with 2 ports and integrated Web server.