Allen-Bradley 1756-PA75R Redundant Power Supply

Description

The Allen-Bradley 1756-PA75R is a ControlLogix Redundant Power Supply designed to deliver reliable, uninterrupted power to industrial control systems, minimizing downtime risks from power failures. It operates with a DC input voltage range of 18-32 volts, with a nominal 24 volts DC input, and a total input power of 110 watts. The unit provides a steady 75 watts of output power across an operating temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit).

Key output current capacities include 1.5 amps at 1.2 volts, 4 amps at 3.3 volts, 13 amps at 5.1 volts, and 2.8 amps at 24 volts, with a surge current rating of 30 amps and a 20 millisecond hold time to maintain power during brief interruptions. Its redundant design enables hot standby operation when paired with a second unit: one module acts as the primary power source, while the other serves as a backup, automatically taking over if the primary unit fails.

The supply features a 90 volts DC signaler power that meets ATEX/IECEx standards, plus a continuous rated isolation voltage of 250 volts with reinforced insulation. It also passes a 60-second high-voltage test at 3250 volts DC for its backplane power input, signaler power input, and signaler-to-backplane configurations, ensuring robust performance in harsh industrial environments.