Allen-Bradley SLC 500 7 Slot Rack 1746-A7 PSU CPU DC Input Analog Relay Output. Used condition in full working order however both analog input cards are missing the terminal sockets. Comes with: 1x 24VDC PSU 1x SLC 5/02 CPU 2x INPUT DC SINK 2x INPUT ANALOG 3x RELAY OUTPUT 1x USB (DF1) to DH485 Adaptor If you have any questions please feel free to ask.