BE-IIS HAT++

Isolated Dual RS-485 (Modbus) Industrial HAT++ for Raspberry Pi

Production

Datasheet Schematic 3D Model Layout DigiKey GitHub Installer

Modbus over RS-485 enables robust long-distance multi-drop communication and is a well-established, future-proof industrial communication standard.

This HAT provides two fully independent, galvanically isolated RS-485 interfaces with automatic direction detection and, as part of the BE-IIS HAT++ ecosystem, is stackable with other HATs from the portfolio for seamless system expansion and simplified system integration.

Isolated Dual RS-485 (Modbus) Industrial HAT++ for Raspberry Pi

Quick Facts

Order Code
BE-IIS-HPP-MODBUS

Revision
B

Status
Production

Overlay
BE-IIS-HPP-MODBUS-I

Key Features

Dual Modbus (RS-485) HAT
SC16IS752 dual I2C to UART controller
up to 1.15MBit/s
Galvanically isolated Interfaces
Configurable 120 Ω bus termination
RSP HAT+ compliant (2024)
Stackable HAT (BE-IIS-HAT++)
Configurable addressing and IRQ routing
RoHS compliant
Quality component suppliers

Applications

MODBUS network evaluation
Embedded system prototyping
Education and training
Gateway and protocol converter development
Industrial communication testing

Raspberry Pi Compatibility

Model	32-bit	64-bit
Raspberry Pi 2	✓
Raspberry Pi 3	✓	✓
Raspberry Pi 4	✓	✓
Raspberry Pi 5	✓	✓
Raspberry Pi Zero	✓
Raspberry Pi Zero 2 W	✓	✓

Compatibility depends on the installed operating system, kernel version and enabled interfaces.

HAT Compatibility Level

Level	Description	Configuration
HAT	Standard Raspberry Pi HAT behaviour	3 configurable hardware configurations
HAT+	Raspberry Pi HAT+ auto-detection mechanism	Instance ID 1 configurable
HAT++	BE-IIS stackability and full board detection concept	3 configurable hardware configurations

Product Links

Software bring-up

How to run the installer.

Open link

DigiKey

Order the product from DigiKey.

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GitHub

Installer and product software resources.

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