Mitsubishi Alpha 2 Expansion Module, 24 V dc, 4 x Output Without Display. Output Type: Digital, Transistor. Mounting Type: DIN Rail. Display Included: No. Width: 124.6mm. Length: 90mm. Depth: 52mm. For Use With: Alpha 2 Series. Dimensions: 90 x 124.6 x 52 mm. Termination Type: Screw. Module Type: I/O Extension. MPN: AL2-4EYT