The I-8077 Digital Input/Output Simulator Module is designed to aid program development. The I-8077 may be used to simulate real world inputs/outputs during your design and debugging process. The I-8077 enables program development to cause a change in input/output status at will to simulate a system activity. You can monitor the status of Digital input/outputs on LEDs. When moving to real hardware or control programs, replace the I-8077 with the appropriate digital input/output module. The logic of program will remain the same.