Inputs/Outputs Inputs/Outputs ACE User's Guide, 3.6.x 18316-000 Rev A Page 274 Item Description Available digital input numbers Lists the available digital input signals for the robot. For additional details on I/O signals, see the user's guide for your robot. Available digital out- put numbers Lists the available digital output signals for the robot. For additional details on I/O signals, see the user's guide for your robot.