1746-P3 Power Supply SLC 500 Series by Allen-Bradley

1746-P3 Power Supply SLC 500 Series by Allen-Bradley

Manufacturer: Allen-Bradley
Product No.: 1746-P3
Condition： In stock
Product Type: Power Supply Module
Payment: T/T, Western Union
Weight: 540g
Shipping port: Xiamen
Warranty: 12 months

Quantity

Selected quantity: 1

Estimate delivery times: 12-26 days (International), 3-6 days (United States).

Return within 30 days of purchase. Duties & taxes are non-refundable.

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Product Introduction

Control engineers deploy the Allen-Bradley 1746-P3 Series Power Supply to energize backplane modules across industrial automation architectures. This dedicated 1746-P3 unit converts a 24 VDC input into regulated internal outputs of 3.6 A at 5 VDC and 0.87 A at 24 VDC. Global PLC Spare HUB's Insight: Panel builders frequently choose this specific DC supply variant for remote skid-mounted enclosures where direct 24V bus architectures eliminate the need for bulky AC step-down transformers.

Configuration Breakdown & Technical Parameters

System Parameter	Technical Specification
Brand & Series	Allen-Bradley / SLC 500 Series / 1746-P3
Catalog Number / Model	1746-P3
Input Voltage Range	19.2 to 28.8 VDC (Nominal 24 VDC)
Backplane Current Output	3.6 A at 5 VDC, 0.87 A at 24 VDC
Line Power & Inrush	90 VA typical requirement; 20 A inrush current
CPU Hold-Up Time	5 ms at full load; 1000 ms at no load
Fuse Protection	Pre-installed 1746-F3 (or equivalent like Bussmann AGC 5)
Physical & Thermal Rating	Weighs 1.1 kg; Operating range 0°C to 60°C (derate 5% above 55°C)

Packing List & Warranty

One Allen-Bradley 1746-P3 Power Supply module
Pre-installed 1746-F3 fuse protection element
Factory inspection certificate and official 12-month warranty documentation

Installation & Maintenance Guidelines

Mount the module strictly on the left-most slot of the 1746 chassis, noting that it consumes zero usable I/O slots.

Ensure the input voltage remains within 19.2 to 28.8 VDC to prevent premature CPU brownout restarts.

Observe ESD precautions by storing the unit in static-shield packaging and avoiding direct contact with connector pins.

Maintain a 1/8-inch flat-head and 1/4-inch Phillips screwdriver on hand for secure terminal block wiring.

Compatibility & Certifications

Fully compatible with all Allen-Bradley SLC 500 modular control system chassis architectures.

Certified by Underwriters Laboratories (UL) and C-UL for Class 1, Division 2 hazardous locations (Groups A, B, C, D).

Designed for Pollution Degree 2 environments and Installation Category II applications up to 2000 meters altitude.

Shipping & Logistics

Global express courier delivery supported via DHL, FedEx, and UPS networks.

Priority order processing ensures warehouse dispatch within 24 to 48 hours.

Industrial-grade packaging secures internal electronics and terminal blocks against transit damage.

Typical Applications & Diagnostic Capabilities

Continuous DC power distribution for discrete and analog manufacturing automation lines.

Wastewater treatment facility automation panels requiring hazardous location compliance.

Rapid identification of input voltage sag via CPU hold-up monitoring during momentary line drops.

Frequently Asked Questions

Question: What causes the 1746-P3 to trigger an internal fuse blowout during startup?

Answer: Excessive inrush current spikes or severe short circuits on the external 24V field wiring loop typically rupture the 1746-F3 fuse element.

Question: How does temperature derating impact current capacity on the 1746-P3 module?

Answer: Operating the power supply above 55°C requires a 5% current capacity reduction to prevent thermal overload inside closed control cabinets.

Question: Can maintenance technicians utilize alternative fuses instead of the specified 1746-F3?

Answer: Yes, approved electrical equivalents such as the Bussmann AGC 5 or Nagasawa ULCS-61ML-5 fuse provide identical protection characteristics.

Question: Why does the 1746-P3 include a 5 ms hold-up time under full load conditions?

Answer: The hold-up circuit sustains internal DC rails long enough for the CPU to safely register an impending power loss without corrupting active program memory.

Question: What mounting restriction applies when installing the 1746-P3 in a standard chassis?

Answer: The unit must occupy the extreme left side of the 1746 rack, where it connects directly to the power bus without consuming standard I/O slot space.

12-Month Comprehensive Warranty

Every part supplied by Global PLC Spare Hub is covered by a 12-month warranty from the date of invoice.

Coverage: Functional defects and hardware failures under normal operating conditions.
Commitment: We provide immediate repair, replacement, or a full refund for any verified defective components to minimize your operational downtime.

Returns & Exchange Policy

We offer a 30-day return policy to ensure you receive the exact part your system requires.

Eligibility: Returns are accepted for uninstalled items in their original, factory-sealed packaging.
RMA Process: Please contact our support team to obtain a Return Merchandise Authorization (RMA) number before shipping.
Fast Processing: Refunds or exchanges are processed within 3–5 business days after the returned item passes our technical inspection.

Need Technical Assistance?Not sure if this part is compatible with your system? [Consult our Engineers] before purchasing to ensure 100% compatibility.