Number of Bidirectional Digital Channels: 0. Digital I/O Isolation: 60 VDC Ch-Earth Ground Isolation. Current Flow Direction: Sinking Output. Front Connection Type: D-Sub. Conformal Coated: No. Enclosed: Yes. Number of Digital Output Only Channels: 32. Number of Digital Input Only Channels: 0. Digital I/O Logic Levels: 12V, 24V, 48V. Maximum Update Rate: 8 us.