Allen-Bradley 1746-OV32 SLC 500 32-Point DC Sinking Output Module By wayne No Comments on Allen-Bradley 1746-OV32 SLC 500 32-Point DC Sinking Output Module 3 Min Read Source the genuine Allen-Bradley 1746-OV32 SLC 500 output module. It features 32 sinking channels with 24VDC nominal voltage for reliable industrial control.