Allen-Bradley 1746-P2 SLC-500 PLC Expansion Rack

The Allen-Bradley 1746-P2 is a rack-mount power supply for the SLC‑500 family, designed to sit in an SLC‑500 chassis or expansion rack to deliver the backplane power that drives the distributed I/O modules. It accepts 120/240 VAC input at 47–63 Hz and provides 70 watts of input power, with backplane currents specified as 5 A on the 5 V rail and 0.96 A on the 24 V rail. Dimensions are 5.5 in (14 cm) wide by 2.9 in (7.4 cm) high by 5.7 in (14.5 cm) deep, and it is rated for 0–60 C operation with an inrush current up to 20 A. Each expansion rack typically requires its own 1746‑P2 power supply to power the backplane and attached I/O modules, supporting modular expansion of the SLC‑500 platform; this power supply is commonly used with fixed-hardware style controllers and expansion chassis such as the 1746‑A2.