Number of Bidirectional Digital Channels: 0. Digital I/O Isolation: 250 Vrms Ch-Ch Isolation. Current Flow Direction: Sinking Input, Sourcing Input. Front Connection Type: Screw Terminal. Conformal Coated: No. Enclosed: Yes. Number of Digital Output Only Channels: 0. Number of Digital Input Only Channels: 8. Digital I/O Logic Levels: 24V, 48V. Maximum Update Rate: 250 us.