1768‑PA3 Allen‑Bradley Power Supply – CompactLogix Series, 120W

1768-PA3 CompactLogix Power Supply – Technical Overview

Allen‑Bradley 1768‑PA3 is a dual‑input power supply for the CompactLogix system. It delivers 24V backplane power to controllers and I/O modules. Designed for 85‑265V AC or 108‑132V DC operation. Ideal for industrial control cabinets requiring reliable, space‑saving power.

Key Features & Description

• Input flexibility: AC (85‑265V, 47‑63 Hz) or DC (108‑132V) – automatic selection.
• Backplane output: 1.4 A @ 24V DC for up to 8 modules in the same bank.
• Integrated protection: Non‑replaceable internal fuse (15A) with external fuse recommendation: 4‑6 A, 28.5‑36.7 A²s.
• Efficiency & dissipation: 75% typical efficiency; 30 W max power dissipation.
• LED status: Green = normal operation; Red = backplane fault; Off = no input power or internal fault.
• Mounting: DIN rail or panel mount (open‑style enclosure).

Technical Specifications

Installation & Compatibility

• Mounting: DIN rail or panel mount – use only with 1768 CompactLogix backplane. Do not use with 1769 power supplies.
• Compatible controllers: 1768‑L43, ‑L43S, ‑L45, ‑L45S.
• I/O capacity: Supports up to 8 1769 Compact I/O modules in the same bank (distance rating applies).
• External overcurrent protection: User‑supplied 4‑6 A fuse (28.5‑36.7 A²s) – recommended for branch circuit.

Environmental & Diagnostics

• Temperature range: 0‑60°C (operating), ‑40‑85°C (storage).
• Humidity: 5‑95% non‑condensing.
• Shock/vibration: 30G (operating), 2G (5‑500 Hz).
• Diagnostic LED: Green = normal; Red = backplane fault or module error; Off = no input or internal fuse blown.
• Fault detection: Overcurrent, overvoltage, and short‑circuit protection (internal fuse).

Typical Applications

• Control panels for packaging, material handling, and conveyor systems.
• Machine automation with CompactLogix controllers and remote I/O.
• Retrofit of legacy 1768 systems requiring reliable power supply.
• Distributed control architectures in harsh industrial environments.

Why Buy From Oiltech Controls?

• 15+ years experience in industrial automation spare parts.
• Global shipment via FedEx, UPS, or DHL – fast and tracked.
• All items tested (industrial surplus or refurbished) before dispatch.
• 12‑month warranty on all 1768‑PA3 modules.
• Technical verification and configuration support prior to shipment.
• Expertise in obsolete control systems – we help keep your legacy plants running.

FAQ – Quick Answers

• Q: Can I use this with 1769 power supply?
  No – only with 1768 CompactLogix backplane.
• Q: What if the LED stays off?
  Check input power, overload, or internal fuse. Replace if faulty.
• Q: Does it support 24V DC input?
  No – it accepts 85‑265V AC or 108‑132V DC only.
• Q: How many I/O modules can I connect?
  Up to 8 modules (1769 series) per bank, respecting distance rating.
• Q: Is the fuse replaceable?
  No – the internal fuse is soldered. External overcurrent protection is required.

Certifications & Compliance

• UL Listed, cUL, CE, and RoHS compliant.
• Designed for industrial control equipment per NFPA 79.
• Open‑type enclosure – suitable for use in pollution degree 2 environments.

Package Contents

• 1 x 1768‑PA3 power supply module
• Installation instructions (printed)
• DIN rail mounting clip (pre‑installed)
• Panel mounting hardware kit

Contact us for technical verification or bulk orders:
Email: info@oiltechcontrols.com
WhatsApp: +86 158 8020 0923
We provide pre‑shipment testing, global shipping, and 12‑month warranty.

Shipping carriers: FedEx, UPS, DHL – worldwide express delivery.

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