SIMATIC S7-1200, spare part I/O terminal block gold-plated analog signals CPU 1215C/1217C, (4 units with 6 screws each) 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.