Siemens 2ES7400-1JA01-0AA0, 6ES7 416-X3L00-0AB0, 407-0DA01-0AA0 Processor/Controller, power supply, complete system comes with power supply, processor, (2) 421-1BL01-0AA0 digital input (3) 422-1BL00-0AA0 digital output module. 9 slots Rack and memory card, all tested and in working condition.