PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-P2 is an auxiliary power supply designed for the PLC-5 system architecture. It mounts directly into two slots of a standard 1771 chassis. The unit provides regulated 5.1V DC backplane power with a maximum output current rating of 6.5 A. It is factory-configured for 120V AC operation but supports selectable 220-240V AC lines.
This module provides electrical distribution to backplane components including communication adapters and Mini-PLC processors. Internal protection monitors against overvoltage, overcurrent, and undervoltage conditions. If a fault occurs, the internal circuitry automatically shuts down power output. Slow-blow fuse protection guards the input stage against excessive current draw during operation.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| UPC | 662468206020 |
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| Weight | 12.00 lbs (5.44 kg) |
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| Module Type | Power Supply |
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| AC Input | 120/220/240 Volts |
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| DC Output | 6.5 Amperes at 5 Volts |
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| Nom Input Voltage | 120V ac @ .75A 220/240V ac @ .38A |
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| Input Voltage Range | 98-132VAC / 196-250VAC |
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| Max Real Input Power | 65W @ full load |
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| Frequency | 60/50Hz |
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| Backplane Output Current | 6.5A maximum @ 5V dc |
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| Fuse | Bussman with part nuber MDL 1A / Littelfuse with part number 313001. |
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| Compatible Parallel Power Supply | 1771-P10 |
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| Cabling | 1771-CT |
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| Location | 1771 Chassis, 2 Slots |
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| Paralleled | -P5, -P10 |
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| Operating Temprerature | 0 to 60 Deg.C (32 to 140 Deg.F) |
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| Storage Temperature | -40 to 85 Deg.C (-40 to Deg.F) |
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| Relative Humidity | 5 to 95% |
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TECHNICAL INFORMATION
Features
- Selectable AC input supporting 120V AC and 220-240V AC power sources
- Regulated 5.1V DC backplane output up to 6.5 A
- Continuous internal self-monitoring for undervoltage, overvoltage, and overcurrent conditions
- Dual-slot form factor engineered for standard 1771 chassis installation
- Paralleling support with 1771-P5 and 1771-P10 power supply units
TECHNICAL INFORMATION
Applications
- Chassis power distribution for Allen-Bradley PLC-5 automation systems
- Auxiliary backplane power for 1771 remote communication adapters
- Power provisioning for 1771 Mini-PLC-2 and Mini-PLC-2/15 processors
TECHNICAL INFORMATION
Connections / Interfaces
- Direct backplane edge connection for 1771 chassis distribution
- Terminal connections for AC utility power input wiring
- 1771-CT cabling interface for paralleled configurations
TECHNICAL INFORMATION
Installation Guidelines
- Set the voltage selector switch to match supply voltage prior to applying power.
- Install a 1 A slow-blow fuse for 120V AC operation.
- Install a 0.5 A slow-blow fuse for 220-240V AC operation.
- Seat the power supply securely into two adjacent chassis slots.
TECHNICAL INFORMATION
Configuration Guidelines
- Confirm input voltage selection before connecting line power.
- Verify total module current draw on the backplane does not exceed 6.5 A.
- Power cycle the module to clear shutdowns caused by monitored fault conditions.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 I/O chassis assemblies
- Allen-Bradley 1771 communication adapter modules
- Allen-Bradley 1771 Mini-PLC-2 and Mini-PLC-2/15 controllers
- 1771-P5 and 1771-P10 parallel power supplies
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 I/O chassis assemblies Allen-Bradley 1771 communication adapter modules Allen-Bradley 1771 Mini-PLC-2 and Mini-PLC-2/15 controllers 1771-P5 and 1771-P10 parallel power supplies
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 voltages are supported by the Allen-Bradley 1771-P2?
The module operates on selectable input ranges of 98-132V AC or 196-250V AC.
What fuse ratings does the 1771-P2 power supply require?
Use a 1 A slow-blow fuse for 120V AC lines and a 0.5 A fuse for 220-240V AC lines.
Does the 1771-P2 provide an integrated battery backup?
No, the 1771-P2 auxiliary power supply does not include internal battery backup.
What is the market reference price for the 1771-P2?
Observed market reference pricing is approximately $159.00 USD for refurbished condition. This is indicative market reference pricing only and not a final quotation.
