Schneider Electric TM3 Series PLC I/O Module 4 Inputs, -10 → 10 V dc, 90 x 23.6 X 70 mm. Input Type: Current, Voltage. For Use With: Modicon M221, Modicon M241, Modicon M251. Length: 90mm. Width: 23.6mm. Depth: 70mm. MPN: TM3AI4G