SIMATIC S7-1200, Extension cable 2-tier setup for SM 12XX, 2.0m SIMATIC S7-1200 Basic Controller - flexible thanks to a wide variety of communication options. Accessories suitable for any requirement are also offered for the SIMATIC S7-1200 series. These range from the battery board for long-term buffering of the real-time clock, memory cards, push-in terminals and input simulators, to the Ethernet switch with four RJ45 ports.