PCI-D96SU/D128SU Card
4. Click the "Digital Input" tab.
5. Select "Port 1" from the "Port Number" drop-down menu.
6. The DI indicators will turn red when the corresponding DO channels 0, 2, 4 and 6 are ON.
User Manual, Ver. 1.0, Apr. 2019, PMH-031-10 Page 29