SIMATIC S7-1200, simulator module SIM 1274, for CPU 1211/1212 8 input switches DC 24V SIMATIC S7-1200 Basic Controller - flexible thanks to a wide range of communication options. The SIMATIC S7-1200 family also offers accessories tailored to your needs. These range from the battery board for long-term buffering of the real-time clock, to memory cards and input simulators, to the Ethernet switch with four RJ45 ports.