The 1756-PA75R  ROCKWELL Redundant Power Supply is an AC redundant power supply module designed to ensure uninterrupted operation for critical ControlLogix chassis by sharing the load and providing full backup if one unit fails.

Environment and Certification

Operating Temperature: Designed to function reliably within a range of 0°C to 60°C (32°F to 140°F).

Power Compatibility: Accepts a wide AC input voltage of 85-265VAC at 47-63 Hz.

Immunity Standards: Features surge-transient immunity (±1/2 kV per IEC 61000-4-5) and conducted RF immunity (10 Vrms).

EMC Classification: Certified as a Class 1, Class A Appliance according to IEC/CISPR 11.

Wire Specifications: Annunciator wiring supports 22-14 AWG stranded copper, with 14 AWG conductor wire.

Environmental Note: May pose EMC challenges in non-industrial settings despite meeting standards.

FAQ

Q1: What is the main purpose of the 1756-PA75R?

A1: It is a redundant AC power supply module designed to ensure uninterrupted operation for critical ControlLogix chassis by providing automatic load sharing and backup.

Q2: What are its key input specifications?

A2: It operates on a wide AC input range of 85-265VAC at 47-63 Hz, with a nominal rating of 120/240VAC.

Q3: How does it achieve redundancy?

A3: It must be paired with an identical power supply and connected via a redundant power supply cable and chassis adapter (e.g., 1756-PSCA2) to form a load-sharing redundant system.

Q4: What output power does it provide?

A4: It delivers a total output power of 75W, with specific current capacities for 1.2V, 3.3V, 5.1V, and 24VDC rails.

Q5: What certifications does it hold for electromagnetic compatibility?

A5: It is certified as a Class 1, Class A Appliance in accordance with IEC/CISPR 11, with defined surge immunity and RF immunity ratings.