Allen-Bradley 20-HIM-A3 Full Numeric LCD Operator Interface for PowerFlex 750

Product Overview
The Allen-Bradley 20-HIM-A3 is a rugged Human Interface Module (HIM) designed by Rockwell Automation as a dedicated operator interface for the PowerFlex family of AC drives. This versatile keypad module enables operators to configure, monitor, and control compatible PowerFlex drives directly at the equipment location. The Allen-Bradley 20-HIM-A3 features a high-performance LCD screen that displays the operating status, frequency, fault codes, and parameter values of the host drive, making troubleshooting significantly easier when errors occur. It communicates with the drive via the DPI (Drive Peripheral Interface) protocol, operating at data rates of 125 Kbps or 500 Kbps, ensuring reliable and responsive interaction.

As a member of the PowerFlex Architecture Class HIM family, the Allen-Bradley 20-HIM-A3 is designed for both handheld use and local drive mounting. Its IP66-rated front panel construction provides excellent protection against dust and high-pressure water jets, making the Allen-Bradley 20-HIM-A3 suitable for demanding industrial environments including food processing, chemical plants, and outdoor installations. The module draws its power directly from the host PowerFlex drive, consuming approximately 140 mA at 12V DC, eliminating the need for a separate power supply. Whether used for initial drive setup, routine parameter adjustments, or real-time performance monitoring, the Allen-Bradley 20-HIM-A3 delivers the durability, functionality, and ease of use required for efficient drive management.

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Description

Technical Specifications

Parameter Name	Value
Product Model	Allen-Bradley 20-HIM-A3
Manufacturer	Rockwell Automation / Allen-Bradley
Product Type	Human Interface Module (HIM) / Operator Keypad
Series	PowerFlex Architecture Class
Compatible Drives	PowerFlex 70, 700, 700S, 700H, 700L, 7000, 753, 755, 755TR, 755TL
Display	High-Performance LCD
Keypad Type	Full Numeric Membrane Keypad, Waterproof
Communication Protocol	DPI (Drive Peripheral Interface)
Communication Speed	125 Kbps or 500 Kbps
Supply Voltage	12V DC (Powered by Host Drive)
Current Consumption	120-140 mA at 12V DC
Protection Rating	IP66 (Front Panel/Waterproof)
Mounting Options	Handheld, Drive-Mount (Bezel Kit Available)
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-40°C to 70°C (-4°F to 158°F)
Maximum Operating Altitude	1,000 meters (3,300 feet) without derating
Weight	Approx. 0.11 kg (0.25 lbs)
Compliance	CE, cUL-us, UL, KC, C-TICK, RoHS

Main Features and Advantages

Full numeric keypad and intuitive interface: The Allen-Bradley 20-HIM-A3 features a complete 12-key numeric layout including digits 0-9, +/- sign, and Enter confirmation key. This dedicated physical keypad enables rapid and accurate parameter entry, significantly improving operational efficiency compared to touchscreen soft keyboards—especially when operators are wearing industrial gloves. The Allen-Bradley 20-HIM-A3 also provides a high-performance LCD display that clearly presents drive status, frequency, and fault information, allowing operators to quickly assess drive conditions and respond to issues.

CopyCat and Jog Mode functionality: One of the standout features of the Allen-Bradley 20-HIM-A3 is its CopyCat capability, which allows operators to store complete parameter sets in the module’s internal memory. This enables rapid drive configuration by cloning settings from one drive to another, eliminating the need to manually enter parameters for multiple drives. The Jog Mode function permits manual motor control directly from the Allen-Bradley 20-HIM-A3 interface, enabling operators to incrementally increase or decrease motor speed during commissioning and maintenance procedures.

Multiple mounting options and rugged construction: The Allen-Bradley 20-HIM-A3 offers flexible deployment options including handheld operation for portable use or drive-mounted installation with an optional panel bezel kit. Its IP66-rated waterproof membrane keypad is engineered to withstand high-pressure water jets, providing reliable operation in wash-down environments, humid conditions, and dusty industrial settings. The Allen-Bradley 20-HIM-A3 is also available in IP20 drive mount and IP66 panel mount variants to suit different installation requirements.

Plug-and-play integration and broad compatibility: The Allen-Bradley 20-HIM-A3 connects directly to the host PowerFlex drive via the DPI communication port, with no external power supply required. The module is compatible with an extensive range of PowerFlex drives including the 70, 700, 700S, 700H, 700L, 7000, 753, 755, 755TR, and 755TL series, making the Allen-Bradley 20-HIM-A3 a versatile solution across diverse applications. Multiple language support further enhances its usability in global industrial operations.