Allen-Bradley 1746-P4 SLC 500 Power Supply 85-250VAC By wayne No Comments on Allen-Bradley 1746-P4 SLC 500 Power Supply 85-250VAC 3 Min Read The Allen-Bradley 1746-P4 SLC 500 power supply delivers 10A at 5VDC and 2.88A at 24VDC. It provides reliable backplane power for your control chassis.