This Siemens S7-1500 PLC training simulator is housed in a convenient black travel case for protection and ease of storage. The lid is detachable so the unit stands on its own with easy access to the components. Power supply : 8 Amp 24VDC 6EP1333-4BA00 CPU : 1151-1PN 6ES7511-1AK01-0AB0 Memory Card : 12MB 6ES7954-8LE02-0AA0 Digital Inputs : 16 Inputs 6ES7521-1BH00-0AB0 Digital Outputs : 16 Outputs 6ES7522-1BH01-0AB0 Analog Inputs : 8 Channels 6ES7531-7KF00-0AB0 Analog Outputs : 8 Channels 6ES7532-5HF00-0AB0