Allen-Bradley 1756-PA72 ControlLogix PLC Power Supply

The Allen-Bradley 1756-PA72 ControlLogix AC power supply is the standard backplane power module for 1756 ControlLogix chassis, designed to mount on the left side of a 10-slot A10 rack and feed the backplane with the four primary DC rails required by ControlLogix I/O and controllers: 1.2 V, 3.3 V, 5 V, and 24 V. It accepts 85–265 V AC input and delivers up to about 225 VA (approximately 95 W) of backplane power. Output currents are roughly 1.5 A at 1.2 V, 4 A at 3.3 V, 10 A at 5 V, and 2.8 A at 24 V, with one PA72 required per chassis to power all modules in the system; standard safety certifications include UL listed, CSA certified, and FM approved. Dimensions are 11.2 cm H x 14.0 cm W x 14.5 cm D (4.41 x 5.51 x 5.71 in), weight about 1.1 kg (2.5 lb), and it is rated for 0 to 60 C operation with 5–95% noncondensing humidity in typical industrial environments.