Allen-Bradley 1746-OB8 SLC 500 DC Output Module, 8 Points By wayne No Comments on Allen-Bradley 1746-OB8 SLC 500 DC Output Module, 8 Points 3 Min Read Buy the Allen-Bradley 1746-OB8 SLC 500 8-point DC output module. It features 24V DC sourcing, 6.9W dissipation, and 135mA backplane current.