Description
Product Introduction
The Allen-Bradley 20-HIM-A6 is an Enhanced Human Interface Module (HIM) designed for setup, commissioning, fault diagnosis, and operation of Allen-Bradley PowerFlex 7-Series AC drives. Featuring a full numeric keypad and a multi-line backlit text display, it provides direct access to parameter structures, live diagnostic meters, and drive control loops.
Mounted directly on the front bezel of a PowerFlex drive or installed remotely in a panel door using an extension cable kit, the 20-HIM-A6 acts as a parameter storage unit. Operators can copy complete parameter sets from one drive into the 20-HIM-A6’s internal flash memory and flash-clone them directly into secondary drives, speeding up multi-drive commissioning and minimizing downtime during drive replacement.
Key Technical Specifications
| Parameter | Specification |
| Manufacturer Part Number | 20-HIM-A6 |
| Drive Compatibility | PowerFlex 70, 700, 700H, 700S, 753, 755 (and DPI-compatible devices) |
| Display Type | Multi-Line Backlit Graphic LCD |
| Keypad Style | Full Numeric Keypad (0-9, Directional, Start, Stop, Folder, Esc) |
| Enclosure Rating | IP20 / NEMA Type 1 (Door Mount Kits available for IP66 / NEMA 4X) |
| Interface Protocol | Drive Peripheral Interface (DPI) |
| Cable / Mounting Option | Direct-mount on drive cradle or handheld/panel door via extension cable |
| Operating Temperature | 0°C to 50°C (32°F to 122°F) |
| Memory Function | Non-volatile flash memory for parameter copy/paste storage |
Application Scenarios & The “Trench” Experience
It is 2:00 AM on a critical packaging line. A PowerFlex 700 drive controlling the main elevator hoist throws an overcurrent fault (F012) and refuses to reset. The line technician plugs a 20-HIM-A6 into the front DPI port. Using the full numeric keypad, they navigate to the Diagnostic folder in seconds, review the fault queue history, adjust the acceleration ramp parameters directly via numeric input, and upload a backup copy of the drive parameters straight into the HIM memory before swapping in a spare drive frame.
- Manufacturing & Assembly Plants – Drive Commissioning & Cloning – Uploads standard baseline parameter profiles across dozens of conveyor drives without connecting a PC.
- Water & Wastewater Facilities – Remote Panel Door Monitoring – Installed using a remote bezel kit on NEMA 4X enclosure doors for safe operator access without opening live high-voltage cabinets.
- Pulp & Paper Facilities – Live Process Tuning – Monitors motor current, output frequency, and bus voltage trends directly on the multi-line LCD screen during full-load speed ramps.
- 20-HIM-A6
- 20-
- 20-
Transparency SOP: Quality Assurance & Testing
We don’t just ship boxes; we test them on live Allen-Bradley PowerFlex drive test stands.
- Inbound Visual Inspection: Microscopic evaluation of keypad membrane integrity, backlight clarity, DPI bus pin condition, and housing latch clips.
- Keypad & Button Response Audit: Every numeric key, directional arrow, folder key, Start, and Stop button tested for tactile feedback and signal entry.
- Live DPI Bus Communication Test: Plugged into a live PowerFlex 700 test rack to verify DPI handshaking, screen contrast adjustment, and live parameter tree loading.
- Parameter Copy/Paste Memory Verification: Full parameter set saved to the 20- internal flash memory, cleared, and restored to confirm zero flash corruption.
- ESD Protection & Packaging: Cleaned, sealed in static-shielding bags, and packaged inside dense shock-resistant foam enclosures.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Mind the Drive Auto/Manual Button!
The 20- features a dedicated Auto/Manual key. If an operator accidentally toggles the HIM into “Manual” mode while testing, the drive will ignore external PLC network commands (ControlNet, EtherNet/IP, or hardwired I/O) until switched back to “Auto”.
- ❗ Never Hot-Unplug During Parameter Upload/Download!
While DPI connections allow hot-swapping, unplugging the 20- while an upload or download progress bar is active will corrupt the drive’s active EEPROM memory or brick the HIM’s flash memory. Always wait for the process completion prompt.
- ⚠️ 20- vs. 20-HIM-C6S (Bezel vs. Remote Cable Mounts)
The 20- is configured for direct bezel snap-in on drive frames. If you intend to door-mount it on a NEMA 4X cabinet, make sure you order the matching 20-HIM-B1 bezel mounting kit or correct DPI extension cable.
- ❗ Check DPI Port Power Limits on Long Cable Runs
When running extension cables to panel doors longer than 10 meters (33 feet), cable voltage drop can cause screen flickering or intermittent DPI disconnect errors. Use recommended Allen-Bradley shielded DPI cables to preserve power delivery.
Frequently Asked Questions (FAQ for Conversion)
Q: Can I use the 20- on PowerFlex 525 drives?
A: No. PowerFlex 520-Series drives (PF523, PF525) use a different interface architecture and require the 22-HIM series modules or built-in keypads. The 20- is engineered specifically for PowerFlex 7-Series drives (PF70, PF700, PF753, PF755).
Q: What is the difference between 20- and 20-HIM-A3?
A: The 20- features a full numeric keypad (0-9 keys) allowing direct parameter number entry, whereas the 20-HIM-A3 features a basic programmer keypad (up/down/left/right navigation arrows only without a full 0-9 number pad).
Q: Is the 20- capable of storing parameter sets for multiple drives?
A: Yes. The 20- non-volatile memory can hold parameter backup files, making it a portable copying tool across multiple drives of the same series.
Q: Are these units original Allen-Bradley / Rockwell hardware?
A: Yes. We supply factory-sealed New Surplus units as well as fully bench-tested, refurbished original Allen-Bradley 20- modules.
Q: What warranty comes with this HIM module?
A: Every Allen-Bradley 20- module includes a full 12-month replacement warranty. If keypad buttons, screen backlights, or DPI communications fail within one year, we ship an immediate replacement directly from our inventory.
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