The Allen-Bradley 20-HIMA-A3 is a Human Interface Module (HIM) designed for use with Rockwell Automation drive and industrial control systems. It provides a direct operator interface for monitoring, configuring, and troubleshooting compatible Allen-Bradley systems, particularly within PowerFlex-class drive architectures and selected PLC-based environments.
This module features a backlit LCD display and full alphanumeric keypad, enabling users to view real-time system status, adjust parameters, and perform diagnostics directly at the device level. Although it is considered a legacy or specialized interface model, it remains widely used in installed industrial systems due to its reliability and compatibility with existing automation infrastructure.
It is typically deployed in manufacturing environments where long-term stability and simple on-site control access are required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Human Interface Module (HIM) |
| Series | Allen-Bradley Operator Interface Class |
| Display | Backlit LCD (multi-line character display) |
| Keypad | Full alphanumeric keypad + function keys |
| Communication | Serial (RS-232 / DH-485 depending on system) |
| Supply Voltage | 24 VDC |
| Power Consumption | ~140 mA |
| Compatible Systems | Selected Allen-Bradley PLC / drive platforms |
| Operating Temperature | -20°C to 60°C |
| Storage Temperature | -40°C to 80°C |
| Humidity Range | 5–95% non-condensing |
Dimensions & Weight
| Item | Value |
|---|---|
| Dimensions (H × W × D) | ~260 × 145 × 55 mm |
| Weight | ~0.48 kg |
The design is slightly larger than modern PowerFlex HIM modules, reflecting its earlier-generation architecture and PLC-oriented interface design.
Recommended Related Models
- 20-HIM-A3 (PowerFlex version) – Modern drive-oriented HIM module
- 20-HIM-A6 – Enhanced LCD interface with improved navigation
- 20-HIM-C6S – Remote-mounted advanced HIM solution
- PowerFlex 750 Series Drives – Modern compatible control platform
- 20G11NC065JA0NNNNN – Common PowerFlex 755 drive system
These alternatives provide improved usability, faster navigation, and stronger integration with modern Ethernet/IP-based industrial networks.
Popular Allen-Bradley Models
- 20-HIMA-A3
- 20-HIM-A3
- 20-HIM-A6
- 20F11NC060JA0NNNNN
- 20G11ND065JA0NNNNN
Allen-Bradley interface modules remain essential in industrial automation environments for maintaining legacy systems and ensuring stable operational continuity.
