Allen Bradley 1756-PA75R Redundant AC power supply for ControlLogix chassis

FAQ

Q1: What is the 1756‑PA75R used for?
It is a redundant AC power supply that provides backplane DC power for ControlLogix systems.

Q2: What input voltages does it accept?
It supports a broad AC range from 85 V to 265 V at 47–63 Hz with nominal 120/240 V AC.

Q3: How much power can this supply deliver?
It delivers up to 75 W of total output power at normal operating temperatures.

Q4: Can it be used for redundant operation?
Yes — it is designed for redundant configurations where two units share the chassis load.

Q5: What DC output rails and currents does it provide?
It provides multiple backplane rails: 1.2 V @ ~1.5 A, 3.3 V @ ~4 A, 5.1 V @ ~13 A, and 24 V @ ~2.8 A.

Q6: Does it provide annunciator power?
Yes — it offers 240 V AC/DC at 50 mA resistive for annunciator use.

Q7: Is isolation provided?
Yes — it has reinforced insulation with ~250 V continuous isolation between inputs and backplane.

Q8: What are its dimensions and weight?
The module is approximately 175 mm × 145 mm × 137 mm and weighs about 1.45 kg.

1756-PA75R Allen Bradley Redundant AC power supply for ControlLogix chassis

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