Siemens S7-300 PLC CPU, USB Networking SIMATIC PG/PC Interface, 64 kB Program Capacity, 10 (Digital) Inputs. For Use With: SIMATIC S7-300 Series. Number of I/O: 16. Voltage Category: 24 V dc. Number of Outputs: 6 (Digital). Communication Port Type: RS485. Depth: 130mm. Minimum Operating Temperature: 0°C. Dimensions: 125 x 80 x 130 mm. MPN: 6ES7312-5BF04-0AB0