Number of Bidirectional Digital Channels: 0. Digital I/O Isolation: 250 Vrms Ch-Earth Ground 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: 4. Digital I/O Logic Levels: 120 VAC, 120 VDC, 12V, 240 VAC, 240 VDC, 24V, 48V, 5V, 72V, 96V. Maximum Update Rate: 3 ms.