JMRI: C/MRI Diagnostics

When it asks for output card number, it means the address. For example, if you have two input cards at 0 and 1, then output cards are address 2, 3, and 4, you can specify 2, 3 and 4 here. Don't think it refers to the "1st" output card, etc.

This is the cmri.serial.diagnostic.DiagnosticFrame help page