Allen-Bradley 1756-PA75R Redundant Power Supply

The Allen-Bradley 1756-PA75R is a ControlLogix redundant AC power supply designed to power a single 1756 chassis, typically used with the 1756-PB75R in a redundant pair to maintain chassis backplane power. It accepts 85–265 VAC input at 47–63 Hz and provides up to 75 W of output power to the chassis, with the PA75R/A and PB75R/A revisions documented for redundancy configurations. The unit supports a 0–60 °C operating range and measures 6.9 in L × 5.7 in W × 5.4 in H, weighing about 3.2 lb. In standard ControlLogix installations, one chassis power supply is required per chassis, and the PA75R is paired with its PB75R counterpart to deliver a dependable power path for the backplane and I/O modules.