Allen-Bradley 1746-OBP16 SLC 500 16-Channel DC Output Module By wayne No Comments on Allen-Bradley 1746-OBP16 SLC 500 16-Channel DC Output Module 2 Min Read Buy the Allen-Bradley 1746-OBP16 SLC 500 digital DC output module. This unit features sixteen sourcing outputs, a 20.4-26.4 VDC range, and integrated fuse protection.