PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-P4 is a PLC-5 power supply module. It mounts across two adjacent slots within a 1771 chassis. The module accepts an input voltage ranging from 97 to 132V AC at 50 to 60 Hz. Nominal input current is 0.88A at 120V AC with 57W input power. The unit provides a regulated output of 5.06V DC at up to 8A.
Internal protection incorporates a 1.5A slow-blow fuse and 15A branch circuit protection. Voltage isolation is tested at 2160V DC for one second. During input power interruptions, power loss delay spans 13.6 ms before processor disable. Operating heat dissipation totals 4W at 2A and reaches 17W under an 8A load. Keying pins connect between pins 12 to 14 and 20 to 22 on the top connector.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
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| Product Line | PLC 5 |
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| Weight | 2.44 lbs (1.11 kg) |
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| Module Type | Power Supply |
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| AC Input Power | 120 Volts 50/60 Hertz |
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| DC Output | 8 Amperes at 5 Volts |
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| Number of Slots | 1 Slot |
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| Backplane Output Current | 8 Amperes (at 5 Volts DC) |
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| Frequency | DC/Rect Sine |
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| Fuse | 1.5 Amperes, 250 Volts, slow-blow |
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| Cabling | 1771-CT |
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| Paralleled | -P5, -P10 |
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| Location | 1771 Chassis, 2 Slots |
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TECHNICAL INFORMATION
Features
- Delivers 5.06V DC output at up to 8A to the backplane.
- Accepts nominal 120V AC input across 97 to 132V AC.
- Occupies two adjacent slots in a standard 1771 chassis.
- Provides 13.6 ms power loss delay before processor disable.
- Features tested isolation of 2160V DC for one second.
- Protects circuits using a replaceable 1.5A slow-blow fuse.
TECHNICAL INFORMATION
Applications
- Distributes 5V DC backplane power across Allen-Bradley 1771 chassis assemblies.
- Supports local and remote PLC-5 processor and I/O hardware configurations.
- Operates in parallel power configurations with 1771-P5 and 1771-P10 modules.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects directly to two adjacent card edge slots on 1771 backplanes.
- Accepts 14 AWG copper wire with 3/64-inch insulation thickness.
- Supports chassis interconnection using 1771-CT cabling.
- Uses mechanical keying between pins 12 to 14 and 20 to 22.
TECHNICAL INFORMATION
Installation Guidelines
- Seat the module into two adjacent slots of a 1771 I/O chassis.
- Verify backplane keying bands match module pin positions before insertion.
- Connect incoming 120V AC power lines using 14 AWG copper wiring.
- Ensure the incoming power branch circuit does not exceed 15A protection.
- Allow adequate clearance for up to 17W of operational heat dissipation.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 series I/O chassis.
- Powers PLC-5 system hardware across the chassis backplane.
- Parallels with 1771-P5 and 1771-P10 power supply modules using 1771-CT cabling.
TECHNICAL INFORMATION
Compliance and Certifications
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 series I/O chassis. Powers PLC-5 system hardware across the chassis backplane. Parallels with 1771-P5 and 1771-P10 power supply modules using 1771-CT cabling.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What input power does the Allen-Bradley 1771-P4 require?
The module requires 120V AC nominal input power across an operating range of 97 to 132V AC.
How many slots does the 1771-P4 occupy in a chassis?
The 1771-P4 installs into two adjacent slots within a standard 1771 I/O chassis.
What is the DC output rating of the 1771-P4?
It delivers an output of 5.06V DC (+-3.8%) at a maximum continuous current of 8A.
Can the 1771-P4 power supply operate in parallel?
Yes. It can operate in parallel with 1771-P5 or 1771-P10 modules using 1771-CT cabling.
What is the indicative market price for the 1771-P4?
Observed market reference pricing is approximately $193 USD for refurbished units. Final quotations depend on stock, condition, and warranty requirements. These figures are indicative market reference pricing only and are not a final quotation.
