Unipi Edge E413 (1 GB RAM, 16 GB eMMC, 120 UL M-Bus)

The Unipi Edge controller combines a PLC, RTU, edge device, IPC, and IoT/IIoT gateway in a single product. It can therefore be used in a wide range of solutions – automation, regulation, and monitoring of building management systems (BMS), HVAC, photovoltaic power plant control, and home or industrial automation systems. Thanks to the Raspberry Pi Compute Module 4, it provides high performance for demanding applications. You can choose from hundreds of product variants within the product models to achieve maximum flexibility for your project.

This model is additionally equipped with an M-Bus master interface with a bus load rating of 120 UL for direct reading of M-Bus meters – for large installations with up to around a hundred meters on a single bus, such as residential complexes, campuses, industrial or energy-sector sub-metering, or large district heating systems.

Features

• Powerful Raspberry Pi Compute Module 4 (4× Arm® Cortex®-A72, max. 1.5 GHz)
• Optional up to 8 GB RAM and 32 GB eMMC memory
• Wide range of communication options including wireless – Ethernet, RS485, M-Bus, WiFi, Bluetooth, LTE and a variant with GNSS
• Integrated M-Bus master interface for reading electricity, water, gas, and heat meters (1× M-Bus, 120 UL, galvanically isolated)
• Enhanced cybersecurity thanks to TPM 2.0
• Software openness (supplied with Base OS operating system based on Linux)
• Operating temperature range from -20 °C to +60 °C
• Special features such as independent hardware Watchdog, user LEDs, or retain memory
• Wide power supply range
• I/O expansion with the xS product line
• Robust aluminum chassis (IP20), designed for installation to a DIN rail
• Product branding, customization options, upload your own operating system or Secure Boot setting during production
• Development and manufacturing in the European Union

Overview of models and variants

All models are based on the Raspberry Pi CM4 processor (4× Arm® Cortex®-A72, max. 1.5 GHz) and feature TPM 2.0, NVRAM (128 kB), independent hardware Watchdog, real-time clock, and user LEDs. In addition to the variants available in our e-shop, any combination of RAM/eMMC and wireless technology (LTE, WiFi/BT, GNSS) can be assembled. Contact us for a price quote.

The M-Bus interface is available in three bus load ratings – 10 UL, 60 UL, and 120 UL – which differ in the number of connectable meters (unit loads). Meters typically draw one or more unit loads (UL) each; choose the variant according to the total load of the connected meters, with some headroom.

*SMA connectors are only included in variants with wireless technology – see the comparison table in the image gallery.

M-Bus interface

The integrated M-Bus master interface lets the controller read electricity, water, gas, and heat meters directly, without an external level converter. The bus is powered from the controller, galvanically isolated from the rest of the unit, and protected against short circuit and overload – ideal for remote meter reading, sub-metering, and energy management in apartment buildings, commercial, and industrial sites.

• 1× M-Bus master, bus load rating 120 UL – large installations on a single bus
• Communication speed 300 to 4800 Bd
• Galvanic isolation
• Short-circuit and overload protection with automatic restart and ERR LED indication; bus power can be switched off from software
• Compliant with EN 13757-2 (M-Bus physical layer)
• Full load is guaranteed up to 55 °C ambient; between 55 °C and 60 °C the limit is 90 UL

Package contents

• Unipi Edge controller with Base OS operating system based on Linux
• Removable connectors
• Aluminium DIN rail holder (35 mm) + 3× DIN rail holder mounting screw
• 1× grounding screw with a fan washer
• Instruction leaflet

More information

• Unipi Edge product line introduction
• Technical specifications can be found in the product datasheet (see Files tab above)
• Manuals/tutorials and OS images in the Knowledge Base