Allen-Bradley PowerFlex 525 25B-A2P5N104 Motor Drive

Allen-Bradley PowerFlex 525 25B-A2P5N104 Overview

The Allen-Bradley 25B-A2P5N104 is a compact, highly versatile Variable Frequency Drive (VFD) from the Bulletin PowerFlex 525 family. Engineered by Rockwell Automation, this AC drive delivers precise speed control and torque regulation for 3-phase induction motors operating on a single-phase AC input supply. Designed for both Normal Duty and Heavy Duty operations, it handles motor power requirements up to 0.4 kW (0.5 HP) with a continuous output current rating of 2.5 Amperes. The module is constructed with a Frame A physical layout weighing 1.1 Kilograms (2.4 Pounds), making it an ideal, space-efficient solution for panel builders and system integrators. Typical industrial deployments include pump systems, material handling conveyors, commercial HVAC equipment, water treatment units, and specialized machinery across various manufacturing sectors.

Performance Architecture, I/O, & Communication

Power Output and Multi-Mode Motor Control

Operating from an input voltage band of 170 to 264 Volts AC (1-phase) at an input current draw of 6.5 Amperes, the 25B-A2P5N104 generates a fully modulated 3-phase output voltage ranging from 0 to 240 VAC across a 0 to 500 Hz frequency spectrum. Internal power switching relies on high-efficiency Insulated Gate Bipolar Transistors (IGBTs) to maintain a typical operational efficiency rating of 97.5%. The drive supports multiple programmable stopping modes—including Ramp, Coast, DC-Brake, and Ramp-to-Stop—to optimize machine stopping performance and reduce mechanical wear.

Flexible Built-In Control I/O Architecture

To support standalone automation sequences or central PLC integration, the 25B-A2P5N104 includes a comprehensive suite of onboard input and output interfaces:

• Discrete Inputs: Seven (7) sink/source selectable digital inputs.
• Discrete Outputs: One (1) Normally Open contact, one (1) Normally Closed contact, plus two (2) digital optocoupler outputs.
• Analog Interfaces: Two (2) dedicated analog inputs (0-10V DC and 0-20mA) and one (1) configurable analog output (0-10V DC / 0-20mA).

Embedded Industrial Networking

The drive comes standard with an onboard EtherNet/IP interface alongside a built-in RS485 / DSI communication port. This dual native connectivity allows seamless programming and monitoring via Studio 5000 or Connected Components Workbench (CCW) software. For expanded factory networking, the drive accepts optional modular communication cards, including Dual-Port EtherNet/IP adapter, DeviceNet adapter, and PROFIBUS DP communications modules.

Technical Specifications Table

Installation, Mounting, & System Compatibility

Mechanical Mounting and Physical Footprint

Featuring compact dimensions of 152.0 mm Height, 72.0 mm Width, and 172.0 mm Depth, the 25B-A2P5N104 supports both standard 35 mm DIN rail mounting and direct panel surface installation. Its Frame A structure allows side-by-side Zero Stacking inside control enclosures up to 50 °C ambient temperatures without requiring derating gaps, significantly conserving valuable panel space.

Power Distribution & Protection Mechanics

The drive includes a removable metal-oxide varistor (MOV) jumper, allowing safe deployment on ungrounded or IT distribution networks. For motor and system protection, the drive integrates built-in overcurrent protection, ground fault trip detection, and output short-circuit trip safety protocols. Dynamic braking is supported via an onboard standard brake transistor.

Frequently Asked Questions (FAQs)

Q1: What does the "N104" suffix in part number 25B-A2P5N104 signify?
A1: In the PowerFlex 525 catalog system, the "N" indicates that this model does not feature an integrated internal EMC filter, while "104" designates a standard IP20 / NEMA Open Type enclosure with a standard control interface module.

Q2: Can the 25B-A2P5N104 drive a 3-phase motor using single-phase residential/commercial power?
A2: Yes. The drive converts standard 1-phase 240V AC power (170-264V AC) into standard 3-phase 240V AC output, allowing standard 3-phase industrial motors to run on single-phase input lines without requiring dynamic phase converters.

Q3: What are the storage requirements to prevent internal component damage?
A3: The drive must be stored within a ambient temperature range of -40°C to 85°C (-40°F to 185°F) with a relative non-condensing humidity between 0% and 95%. The storage environment must be strictly free of corrosive gases, vapors, or excessive chemical dust to preserve internal electronics and the IEC 60721-3-3 3C2 conformal coating.