Number of Slots 3(Can be incereased by connecting consoles) AC Power Single-phase AC, 100V-240V (Auto-selected) Extension Connection among the unit cases (Providing support for large-scale systems) External Communication Contact I/O (for Emergency stop) Ambient Conditions 0-40℃, below 85% RH, no condensation Dimensions 430(W)x100(H)x360(D)mm