Allen-Bradley PowerFlex VFD Selection Guide: PF523 vs PF525 vs PF527 vs PF755
Contents
1. PowerFlex Family Overview
Allen-Bradley PowerFlex drives are organized into two main product lines: the 520-series for compact, general-purpose applications up to 30 HP, and the 750-series for high-performance industrial applications up to 2000 HP. All four current families share a common Rockwell Automation Integrated Architecture philosophy with varying levels of EtherNet/IP connectivity and Studio 5000 integration.
PowerFlex 523 (Bulletin 25A)
The PowerFlex 523 is the economy option in the 520-series. It provides general-purpose control for standalone machines ranging from 0.25 to 30 HP (22 kW). It supports V/Hz and Sensorless Vector Control (SVC, including SVC Economizer); Closed Loop Velocity Vector Control and PM motor control are PowerFlex 525 only. The 523 has no embedded EtherNet/IP port — network connectivity requires an optional dual-port EtherNet/IP card. It includes one accessory card slot, 5 digital inputs (1 dedicated Stop + 4 programmable), 1 analog input, 1 relay output, and 1 PID loop. The 523 does not include Safe Torque Off (STO is a PowerFlex 525 feature). Programming is done via Connected Components Workbench (CCW).
PowerFlex 525 (Bulletin 25B)
The PowerFlex 525 is the full-featured 520-series drive, covering 0.5 to 30 HP (0.4 to 22 kW); the 0.25 HP rating is PowerFlex 523 only. It adds embedded single-port EtherNet/IP, Closed Loop Velocity Vector Control, PM motor control with or without encoder, 7 digital inputs, 2 analog inputs, 2 relay outputs, 2 opto outputs, 2 PID loops, and 2 accessory card slots. Safe Torque Off is SIL 2/PLd (hardwired). The 525 supports CCW and Studio 5000 Add-On Profiles (AOPs). Its operating temperature range extends down to −20°C, and it supports zero stacking up to 45°C ambient.
PowerFlex 527 (Bulletin 25C)
The PowerFlex 527 is designed exclusively for use with Allen-Bradley Logix controllers (ControlLogix 1756-L7x, GuardLogix 1756-L7xS, and CompactLogix 5370). It is programmed entirely in Studio 5000 using the same motion instructions (MAM, MAJ, MAS) as Kinetix servo drives. The 527 features dual-port EtherNet/IP with Device Level Ring (DLR) support, SIL 3/PLe Safe Torque Off with CIP Safety over EtherNet/IP, Position and Velocity loop control with optional encoder, and an output frequency range of 0–590 Hz. It covers 0.5 to 30 HP and shares the same frame sizes (A–E) as the 523 and 525. The carrier frequency maximum is 8 kHz.
PowerFlex 755 (Bulletin 20G)
The PowerFlex 755 is a high-performance, high-horsepower drive for demanding industrial applications from 0.5 to 2000 HP (0.37 to 1500 kW) at 200–690V AC. It features full flux vector control, DeviceLogix embedded control technology, predictive diagnostics, a slot-based I/O architecture with option cards, and a comprehensive safety suite including Safe Torque Off, Safe Speed Monitor, and Integrated Safety Functions. The 755 comes in wall-mount frames (1–7) and floor-mount MCC-style cabinets (frames 8–10). It includes a built-in Ethernet port and supports multiple communication protocols via option cards.
2. Side-by-Side Comparison Table
The following table summarizes the key specifications of each PowerFlex drive family, extracted from the Rockwell Automation technical data publications listed in the Reference Documentation section below.
| Feature | PowerFlex 523 (25A) | PowerFlex 525 (25B) | PowerFlex 527 (25C) | PowerFlex 755 (20G) |
|---|---|---|---|---|
| Power Range | 0.25–30 HP | 0.5–30 HP | 0.5–30 HP | 0.5–2000 HP |
| Voltage Classes | 100–600V | 100–600V | 100–600V | 200–690V |
| Control Methods | V/Hz, SVC (incl. SVC Economizer) | V/Hz, SVC, Closed Loop VVC, PM (with/without encoder) | V/Hz, SVC, Position Loop, Velocity Loop (with encoder) | Full flux vector, DeviceLogix |
| Embedded EtherNet/IP | No (optional card) | Single port | Dual-port with DLR | Yes (built-in) |
| Safe Torque Off (STO) | None | SIL 2/PLd (hardwired) | SIL 3/PLe (hardwired + CIP Safety) | STO + Safe Speed Monitor + Integrated Safety |
| Digital Inputs | 5 (1 Stop + 4 prog.) | 7 (1 Stop + 6 prog.) | 4 (programmable) | Slot-based (option cards) |
| Analog Inputs | 1 (isolated, 0–10V / 4–20mA) | 2 (isolated, ±10V / 4–20mA) | 2 (isolated, ±10V / 4–20mA) | Slot-based (option cards) |
| Relay Outputs | 1 (Form C) | 2 (1 Form A + 1 Form B) | 2 (1 Form A + 1 Form B) | Slot-based (option cards) |
| Opto Outputs | — | 2 programmable | 2 programmable | Slot-based (option cards) |
| Analog Output | 1 (0–10V or 4–20mA; not on Series A) | 1 (0–10V or 4–20mA) | 1 (0–10V or 4–20mA) | Slot-based (option cards) |
| PID Loops | 1 | 2 | N/A (Logix controller) | Programmable (DeviceLogix) |
| Accessory Slots | 1 | 2 | 1 (encoder card) | Multiple (slot-based architecture) |
| Carrier Frequency | 2–16 kHz | 2–16 kHz | 2–8 kHz | 2–12 kHz |
| Output Frequency | 0–500 Hz | 0–500 Hz | 0–590 Hz | 0–590 Hz (at 4 kHz carrier; 0–325 Hz at 2 kHz) |
| Efficiency | 97.5% (typical) | 97.5% (typical) | 97.5% (typical) | — |
| Operating Temp | −20 to +50°C | −20 to +50°C | −20 to +50°C | 0 to +50°C |
| Enclosure | IP20 (optional IP30/NEMA 1) | IP20 (optional IP30/NEMA 1) | IP20 (optional IP30/NEMA 1) | IP00/IP20/IP54 |
| Mounting | DIN rail or screw (Frame A–C) | DIN rail or screw (Frame A–C) | DIN rail or screw (Frame A–C) | Wall mount (1–7), Floor/MCC (8–10) |
| Logix Required | No | No | Yes | No |
| Programming Software | CCW + Studio 5000 AOPs (network option card needed for EtherNet/IP) | CCW + Studio 5000 AOPs | Studio 5000 only | CCW + Studio 5000 AOPs |
3. PowerFlex 523 vs. PowerFlex 525
The PowerFlex 523 (0.25–30 HP) and 525 (0.5–30 HP) share the same frame sizes, but the 525 adds significant capabilities. The choice between them comes down to whether your application needs embedded Ethernet, closed-loop control, or expanded I/O.
Key Differences
| Feature | PowerFlex 523 (25A) | PowerFlex 525 (25B) |
|---|---|---|
| EtherNet/IP | Not included — requires optional dual-port card in the single accessory slot | Embedded single-port EtherNet/IP standard on every unit |
| Closed Loop Vector | Not available | Closed Loop Velocity Vector Control with optional encoder card |
| PM Motor Control | Not available | Interior PM with or without encoder, Surface Mount PM |
| Digital Inputs | 5 total (1 Stop + 4 programmable) | 7 total (1 Stop + 6 programmable) |
| Analog Inputs | 1 isolated (unipolar 0–10V or 4–20mA) | 2 isolated (−10 to +10V and 4–20mA) |
| Relay Outputs | 1 programmable (Form C) | 2 programmable (1 Form A + 1 Form B) |
| Opto Outputs | None | 2 programmable (30V DC, 50 mA) |
| PID Loops | 1 | 2 (independently programmable) |
| Accessory Slots | 1 | 2 |
| Studio 5000 AOPs | Available (requires a network option card) | Available for Logix integration |
| Point-to-Point Positioning | Not available | Available (basic position control with encoder) |
| ATEX Certification | Not available | Certified (with ATEX approved motors) |
When to Choose the PowerFlex 523
- Budget-sensitive standalone applications where EtherNet/IP is not required and RS-485/DSI communication is sufficient.
- Simple V/Hz or SVC motor control — fans, pumps, conveyors that do not need closed-loop speed regulation.
- Minimal I/O requirements — a single analog speed reference and a few digital inputs for start/stop/jog.
- Single PID loop is adequate — e.g., maintaining a single process variable like pressure or temperature.
When to Choose the PowerFlex 525
- EtherNet/IP networking required — the embedded port avoids consuming the accessory slot for a network card.
- Closed-loop speed or position control — applications requiring encoder feedback for precise speed regulation.
- Multiple speed references or process loops — the second analog input and second PID loop enable dual-variable control (e.g., pressure + flow).
- More discrete control points — 7 digital inputs plus 2 opto outputs plus 2 relay outputs give more wiring flexibility without additional I/O modules.
- Logix integration via AOPs — Studio 5000 Add-On Profiles provide structured drive data in the controller project.
4. PowerFlex 527 — Logix-Integrated Motion
The PowerFlex 527 (bulletin 25C) is fundamentally different from the 523 and 525. It is designed exclusively for use with Allen-Bradley Logix Programmable Automation Controllers. It does not operate standalone — it requires a ControlLogix (1756-L7x), GuardLogix (1756-L7xS), or CompactLogix 5370 controller to function.
Key Specifications (from 520-TD002)
| Parameter | Value |
|---|---|
| Power Range | 0.5–30 HP (0.4–22 kW) |
| Voltage Classes | 100–120V 1-phase, 200–240V 1/3-phase, 380–480V 3-phase, 525–600V 3-phase |
| Control Methods | V/Hz, Fan/Pump V/Hz, SVC, SVC Economizer, Position Loop (encoder), Velocity Loop (encoder) |
| EtherNet/IP | Dual-port with Device Level Ring (DLR) support |
| Safe Torque Off | SIL 3/PLe Cat 3 — hardwired or CIP Safety via EtherNet/IP |
| Digital Inputs | 4 programmable (6 mA, sink/source) |
| Analog Inputs | 2 isolated (±10V and 4–20mA) |
| Relay Outputs | 2 (1 Form A + 1 Form B) |
| Opto Outputs | 2 programmable (30V DC, 50 mA) |
| Analog Output | 1 non-isolated (0–10V or 4–20mA) |
| Output Frequency Range | 0–590 Hz (programmable) |
| Carrier Frequency | 2–8 kHz (rated at 4 kHz) |
| Efficiency | 97.5% (typical) |
| Encoder Support | Optional incremental encoder card (dual channel, up to 250 kHz) |
| Frame Sizes | A through E (same as 523/525) |
| Operating Temperature | −20 to +50°C (without derating) |
| Overload (Heavy Duty) | 150% for 60s, 180% (200% programmable) for 3s |
Why Choose the PowerFlex 527
- You already have a Logix controller and want to program the drive using the same Studio 5000 environment and motion instructions (MAM, MAJ, MAS, MGS) as your Kinetix servo drives.
- You need CIP Safety over EtherNet/IP — the 527 supports controller-based Integrated Safety at SIL 3/PLe, eliminating hardwired safety circuits and simplifying safety validation.
- You need Device Level Ring (DLR) — dual-port EtherNet/IP with DLR provides fault-tolerant ring topology at the device level, critical for applications where a single cable break cannot take down the drive network.
- Position or velocity loop control — for conveyor indexing, in-feed/out-feed, winders, or other applications requiring coordinated motion with Logix motion axes.
- Higher output frequency — 0–590 Hz output for high-speed spindle or specialized motor applications.
5. PowerFlex 755 — High-Performance Drives
The PowerFlex 755 (bulletin 20G) is Rockwell Automation’s high-end AC drive platform for industrial applications that exceed the 30 HP limit of the 520-series or require advanced control, diagnostics, and safety capabilities.
Key Specifications (from 750-TD001)
| Parameter | Value |
|---|---|
| Power Range | 0.5–2000 HP (0.37–1500 kW) |
| Voltage Classes | 240V AC (325V DC), 400V AC (540V DC), 480V AC (650V DC), 600V AC (810V DC), 690V AC (932V DC, not UL Listed) |
| Control Method | Full flux vector control |
| DeviceLogix | Embedded control technology for discrete outputs and drive control functions |
| Communication | Built-in Ethernet port; option cards for additional protocols |
| Safety | Safe Torque Off, Safe Speed Monitor, Integrated Safety Functions Option |
| I/O | Slot-based architecture — option cards for analog/digital I/O |
| Predictive Diagnostics | Tracks cooling fan life, motor runtime hours, bearing monitoring via relay outputs |
| Frame Sizes (Wall Mount) | 1–7 (IP00/IP20, NEMA Type Open) |
| Frame Sizes (Floor Mount) | 8–10 (IP20/IP54, NEMA Type 1/12, 2500 MCC-style cabinet) |
| Brake Transistor | Standard on Frames 1–5; optional on Frames 6–7 |
| DC Link Choke | Included on all frames |
PowerFlex 755 Product Selection (480V AC, 3-Phase, Normal Duty)
| HP (ND, 480V) | Frame Size | Enclosure Options |
|---|---|---|
| 1–10 | 1 | IP20, NEMA/UL Type Open (code R) |
| 1–15 | 2 | IP20 Open (N), Flange with NEMA/UL Type 4X/12 back (F), IP54 NEMA/UL Type 12 (G) |
| 20–30 | 3 | IP20 Open (N), Flange with NEMA/UL Type 4X/12 back (F), IP54 NEMA/UL Type 12 (G) |
| 40–50 | 4 | IP20 Open (N), Flange with NEMA/UL Type 4X/12 back (F), IP54 NEMA/UL Type 12 (G) |
| 60–75 | 5 | IP20 Open (N), Flange with NEMA/UL Type 4X/12 back (F), IP54 NEMA/UL Type 12 (G) |
| 100–200 | 6 | IP00 Open (N, user-installed flange kit available), IP54 NEMA/UL Type 12 (G) |
| 250–400 | 7 | IP00 Open (N, user-installed flange kit available), IP54 NEMA/UL Type 12 (G) |
| 350–650 | 8 | MCC-style cabinet: IP20 NEMA/UL Type 1 or IP54 NEMA 12; IP00 without control POD |
| 700–1250 | 9 | MCC-style cabinet: IP20 NEMA/UL Type 1 or IP54 NEMA 12; IP00 without control POD |
| 1350–1750 (2000 HP Light Duty) | 10 | MCC-style cabinet: IP20 NEMA/UL Type 1 or IP54 NEMA 12; IP00 without control POD |
When to Choose the PowerFlex 755
- Your application exceeds 30 HP. The 520-series tops out at 30 HP / 22 kW. For anything larger, the PowerFlex 755 is the path.
- You need full flux vector control for demanding torque applications: cranes, hoists, extruders, winders, test stands.
- Advanced safety functions required — Safe Speed Monitor and Integrated Safety Functions go beyond the basic Safe Torque Off available on the 520-series.
- Predictive diagnostics — tracking fan life, motor hours, and drive health for predictive maintenance programs.
- MCC integration — floor-mount frames 8–10 are 2500 MCC-style cabinets with integrated AC line fuses, roll-out design, and option bays for control/protection devices.
- DeviceLogix — embedded logic execution on the drive itself, reducing controller scan time and providing local autonomy for discrete control sequences.
6. Upgrading from PowerFlex 40 to PowerFlex 525
The PowerFlex 40 (bulletin 22B) is a legacy Allen-Bradley adjustable frequency AC drive that has been in service since the mid-2000s. While Rockwell Automation still supports the product with firmware and documentation updates, the PowerFlex 40 lacks modern safety features, Ethernet connectivity, and the modular design of the 520-series. The PowerFlex 525 is the recommended upgrade path.
PowerFlex 40 vs. PowerFlex 525 — Specification Comparison
| Feature | PowerFlex 40 (22B) | PowerFlex 525 (25B) |
|---|---|---|
| Power Range | 0.5–15 HP (0.4–11 kW) | 0.5–30 HP (0.4–22 kW) |
| Voltage Classes | 100–600V AC | 100–600V AC |
| Control Methods | V/Hz, SVC | V/Hz, SVC, Closed Loop VVC, PM Motor |
| Safe Torque Off | None | SIL 2/PLd (built-in, hardwired) |
| EtherNet/IP | Optional (22-COMM-E adapter) | Embedded single-port |
| RS-485 | Integral (RJ45) | Integral RS-485/DSI |
| Optional Networks | 22-COMM-x adapters: EtherNet/IP, DeviceNet, ControlNet, PROFIBUS DP, BACnet, LonWorks | Dual-port EtherNet/IP, DeviceNet, PROFIBUS DP (via accessory cards) |
| Digital Inputs | 7 (1 Stop + 4 multi-function + 2 dedicated) | 7 (1 Stop + 6 programmable) |
| Analog Inputs | 2 (0–10V / ±10V and 4–20mA) | 2 (isolated, ±10V and 4–20mA) |
| Relay Outputs | 1 (Form C) | 2 (1 Form A + 1 Form B) + 2 opto outputs |
| Analog Output | 1 (0–10V or 4–20mA) | 1 (0–10V or 4–20mA) |
| PID Loops | 1 | 2 |
| Accessory Slots | 0 (1 comms slot) | 2 |
| Carrier Frequency | 2–16 kHz | 2–16 kHz |
| Output Frequency | 0–400 Hz | 0–500 Hz |
| Efficiency | 97.5% (typical) | 97.5% (typical) |
| Operating Temperature | −10 to +50°C (IP20) | −20 to +50°C |
| Overload | 150% for 1 min, 200% for 3s | 150%/60s, 180% (200% programmable)/3s; ND rating of 110%/60s, 150%/3s only above 15 kW (20 HP) |
| Enclosure | IP20 or IP66 (NEMA 4X) | IP20 (optional IP30/NEMA 1) |
| Frame Sizes | B and C | A through E |
| Design | Single-piece (non-modular) | Modular (detachable control module) |
Why Upgrade from the PowerFlex 40
- Safe Torque Off (STO). The PowerFlex 40 has no built-in safety function. The PowerFlex 525 includes SIL 2/PLd Safe Torque Off, which removes rotational power from the motor without de-energizing the drive. This is increasingly required by machine safety standards (ISO 13849, IEC 62061) and can eliminate external safety contactors in many applications.
- Embedded EtherNet/IP. The PowerFlex 40 needs an optional 22-COMM-E communication adapter for EtherNet/IP. The PowerFlex 525 has a built-in EtherNet/IP port for configuration, monitoring, and control over standard Ethernet infrastructure — critical for IIoT, remote diagnostics, and Logix integration.
- Closed Loop Vector Control. The PowerFlex 40 only supports V/Hz and SVC. The 525 adds Closed Loop Velocity Vector Control and PM motor control, enabling tighter speed regulation for demanding applications.
- Modular Design. The PowerFlex 40 is a single-piece unit. The 525’s detachable control module allows MainsFree configuration (connect control module to a PC via USB without applying mains power), faster commissioning, and a common spare across all power ratings.
- Expanded I/O. The 525 adds a second analog input, a second relay output, 2 opto outputs, and a second PID loop — reducing the need for external I/O modules in many applications.
- Extended Power Range. The PowerFlex 40 stops at 15 HP. The 525 goes to 30 HP, covering growth scenarios with the same platform.
- Zero Stacking. The 525 supports side-by-side mounting with zero side clearance up to 45°C ambient, saving panel space. The PowerFlex 40 requires side clearance at all temperatures.
Migration Considerations
| Consideration | Details |
|---|---|
| Voltage Compatibility | Both drives cover 100–120V (1-phase), 200–240V (1/3-phase), 380–480V (3-phase), and a 600V class (PF40: 460–600V; PF525: 525–600V). Check the supply voltage before replacing a 600V-class PF40. |
| Power Overlap | The PowerFlex 40 covers 0.5–15 HP. The PowerFlex 525 starts at 0.5 HP, so every PF40 rating has a PF525 at the same HP. |
| Physical Size | Frame sizes differ between the two products. The PF525 may be larger or smaller depending on the rating. Verify panel cutout dimensions before ordering. The PF525 Frame A and B drives are generally comparable to PF40 Frame B units at the same HP rating. |
| STO Wiring | The PF40 has no STO. The PowerFlex 525 has safety inputs S1, S2 and S+, shipped with a factory jumper across all three. If STO is not used, leave the jumper in place and verify it is tight; if both safety inputs are open the drive faults on F059 (Safety Open). |
| Control Wiring | Terminal assignments differ. The PF40 and PF525 both have 7 digital inputs, but pin numbers and default functions are different. Create a terminal-by-terminal wiring mapping before conversion. |
| Parameter Mapping | Parameter numbers are completely different between the PF40 and PF525. Key startup parameters (motor NP data, speed limits, accel/decel) must be re-entered. Plan to re-enter parameters manually; check Rockwell’s current migration resources for conversion tools. |
| Communication | If the PF40 uses DeviceNet (22-COMM-D), the PF525 can use the embedded EtherNet/IP port or an optional DeviceNet card. If migrating to EtherNet/IP, controller programming changes are required. |
| IP66/NEMA 4X | The PF40 is available in IP66/NEMA Type 4X (catalog suffix “C”). The PF525 is IP20 with an optional IP30/NEMA 1 conduit box. If you need IP66 washdown protection, the PF525 must be installed in a separate NEMA 4X enclosure. |
7. Selection Decision Tree
Use this simplified decision tree to narrow down the right PowerFlex drive for your application.
| Application Requirement | Recommended Drive | Why |
|---|---|---|
| More than 30 HP | PowerFlex 755 (20G) | Only the 750-series covers 30+ HP. The 755 goes to 2000 HP. |
| Logix motion control (MAM/MAJ instructions) | PowerFlex 527 (25C) | Designed exclusively for Logix; same programming as Kinetix servo drives. |
| CIP Safety over EtherNet/IP | PowerFlex 527 (25C) or 755 (20G) | SIL 3/PLe with network-based safety. The 525 supports hardwired STO only; the 523 has no STO. |
| Device Level Ring (DLR) network | PowerFlex 527 (25C) | Dual-port EtherNet/IP with DLR for fault-tolerant ring topology. |
| Embedded EtherNet/IP (standalone drive) | PowerFlex 525 (25B) | Built-in single-port EtherNet/IP with standalone operation and 2 accessory slots. |
| Closed loop speed/position (no Logix) | PowerFlex 525 (25B) | Closed Loop VVC + encoder card in accessory slot. Operates standalone. |
| Basic standalone V/Hz or SVC, no Ethernet | PowerFlex 523 (25A) | Lowest cost. V/Hz and SVC cover most simple applications. |
| Replacing a PowerFlex 40 | PowerFlex 525 (25B) | Same voltage classes, overlapping power range. Adds STO, EtherNet/IP, closed loop. |
| Flux vector, cranes, hoists, extruders | PowerFlex 755 (20G) | Full flux vector control with DeviceLogix and predictive diagnostics. |
| MCC-style cabinet with integrated fuses | PowerFlex 755 (20G) | Frames 8–10 are 2500 MCC cabinets with roll-out design. |
8. Related Products & Guides
Related How-To Guides
| Guide | Description |
|---|---|
| PowerFlex 525 Installation Guide | Hardware setup, power wiring, control I/O wiring, grounding, keypad operation, and basic startup for the 25B-D6P0N104. |
| PowerFlex 525 Pump Application | Configuring the PowerFlex 525 for pump motor control with PID, power wiring, and PLC integration. |
| PowerFlex 525 HVAC Application | V/Hz setup for variable-torque fan loads, sleep/wake, and building automation (BAS) integration. |
| CompactLogix 5069-L306ER Setup | Setting up the CompactLogix 5380 controller, which controls PowerFlex 523/525 drives over EtherNet/IP. |
| Stratix 2000 Ethernet Switch | Unmanaged switch for connecting PowerFlex drives, PLCs, and HMIs on an EtherNet/IP network. |
PowerFlex Drives at PLC Exchange
Click any catalog number below to view full specs, pricing, and availability. Product cards update live with current stock.
PowerFlex 525 (25B) — Most Popular
Modern general-purpose VFD with EtherNet/IP, auto-tuning, and the full PowerFlex 520-series feature set. Ideal default choice for new installations from 0.5 HP to 30 HP.
PowerFlex 40 (22B) — Legacy Replacement
Still supported for direct replacement in existing PowerFlex 40 installations. For new installations, see PowerFlex 525.
PowerFlex 523 (25A) — Essential / Budget
Simplified drop-in VFD without the full 525 feature set — the right choice when EtherNet/IP and auto-tuning are not required.
PowerFlex 527 (25C) — Networked Motion
Kinetix-family drive optimized for integrated motion on EtherNet/IP; use when coordinating with Kinetix 5500/5700 servos.
Reference Documentation
The following Rockwell Automation publications were used as the source of all technical specifications in this guide.
| Publication | Description | Download |
|---|---|---|
| 520-TD001 | PowerFlex 520-series AC Drive Specifications Technical Data (PF523 & PF525) | |
| 520-TD002 | PowerFlex 527 AC Drive Specifications Technical Data | |
| 750-TD001 | PowerFlex 750-series AC Drive Specifications Technical Data (PF753 & PF755) | |
| 22B-UM001 | PowerFlex 40 Adjustable Frequency AC Drive User Manual | |
| 520-UM001 | PowerFlex 520-series Adjustable Frequency AC Drive User Manual |
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