Siemens 6ES7274-1XF50-0XA0 PLC CPU Module. Siemens 6ES7274-1XF50-0XA0 is the exact manufacturer order number for a plc cpu module in the SIMATIC S7-1200 portfolio. Siemens describes this exact reference as: SIMATIC S7-1200 G2, simulator module SIM 1274, for CPU 1212 8 input switches 24 V DC. The verified manufacturer lifecycle record is PM300: Active Product.