I/O Interface for TTL Inputs

Pin assignments match E-Prime style pin assignments:

• the first TTL digital input channel is pin 2 of the DSub
• the final TTL digital input is pin 9 of the DSub

Note: The Smart Center does not presently support digital output, however this functionality may be added in a future firmware and software revision—contact BIOPAC to indicate your interest in Smart Center digital output lines.