SIPLUS S7-300 CPU 312C for medial exposure -25...+70 C based on 6ES7312-5BF04-0AB0 . Compact CPU with MPI. 10 DI/6 DQ. 2 high-speed counters (10 kHz) Integr. power supply 24 V DC. work memory 64 KB. Front connector (1x 40-pole) and Micro Memory Card required