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Aion 420 technical Datasheet

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AION420 4-20 mA LPWAN Gateway
Figure 1. AION420 4–20 mA LPWAN Bridge

The AION420 is a compact IoT bridge for wirelessly connecting industrial 4–20 mA sensors to LoRaWAN® and mioty® networks. The device acquires analog process values and transmits the measured values energy-efficiently to existing IoT platforms without requiring additional cabling or local infrastructure.

Since the AION420 is part of the 4–20 mA current loop, the device is powered by an external power supply. This makes it particularly suitable for applications with an existing power supply and provides a reliable connection of existing measurement points to modern IoT infrastructures.

For easy integration into various systems, the AION420 is available both as a terminated version for direct connection to a sensor and as a loop-through version for integration into existing sensor cabling .

This allows existing 4–20 mA sensors to be digitized quickly and cost-effectively .

Typical applications include the monitoring of levels, pressures, flow rates, temperatures, and other process variables in industrial, energy, water, and environmental applications.

Table of Contents
  1. Versions
  2. General Features
  3. Connectivity and RF Specifications
  4. Sensor Specifications: 4–20 mA Interface
  5. Temperature Specifications
    1. Connections
    2. Electrical Parameters
  6. Installation, Assembly, and Wiring
    1. Wiring Diagram and Pin Assignment (Sensor Side)
    2. Connection Diagram and Pin Assignment for the Supply Side of the Terminated Version
    3. Connection Diagram and Pin Assignment (Supply Side) for the Looped Version

1. Versions

Part Number Class Version Configuration Interface
S-AION-LOEU-420 LoRaWAN Class A Terminated BLE 4-20 mA (2 channels)
S-AION-MIOTY-420 mioty Class A Terminated BLE 4–20 mA (2 channels)
S-AION-LOEU-420-3L LoRaWAN Class A Loop BLE 4–20 mA (2 channels)
S-AION-MIOTY-420-3L mioty Class A Loop BLE 4–20 mA (2 channels)

2. General Features

Feature Value Unit
Dimensions (D x H) 99.1 x 50 x 31 mm
Weight 130 g
Operating temperature -20 to 80 °C
Storage temperature (recommended) 15 to 25 °C
Relative humidity during operation 10 to 90 %
IP Rating IP67/IP65
Traffic light function / Visual feedback LED
Acoustic alarm function Buzzer
Provisioning and Configuration BLE
Material Housing: PA; Cover: PA; Cover gasket: TPE; M12 gasket: FKM
BLE antenna Integrated
RF antenna Integrated for all versions
Accelerometer Optional
Batteries None
Primary cell type -
Outdoor use No

3. Connectivity and RF Specifications

Feature Value Unit
RF standards
Frequency LoRaWAN® / mioty® EU 868 MHz
Transmit Power LoRaWAN® / mioty® EU 14 dBm
LoRa® MAC Layer Version 1.0.4

4. Sensor Specifications: 4–20 mA Interface

Characteristic Value Unit
Type Accuracy Absolute Error 0.05 mA + Relative Error 0.25%

5. Temperature Specifications

Characteristic Value Unit
Temperature Range -30 to +85 °C
Accuracy 0°C to 70°C ±2 °C
Accuracy from -40°C to +85°C ±1.5 °C
Resolution 1 °C

5.1 Connections

Characteristic Value Unit
Sensor side A-coded, female with cap nut
Supply side A-coded, male
  • Terminated version: 2-pin, VCC and GND
  • Looped-through version: 4-pin, VCC, GND, Isense 1, Isense 2

5.2 Electrical Parameters

Characteristic Value Unit
Operating voltage 9 to 26 V
Rated voltage 24 V
Max. Current Consumption 0.2 A
Max. Current Carrying Capacity 0.3 A

6. Installation, Assembly, and Wiring

AION420 Wichtige Elemente
Figure 2. Aion 420 Sketch Showing Key Components
Component Description
M1 Magnetic Switch 1
M12 Sup M12 connection, supply side
LED LED – visual feedback and flashing signal
M12 Sens M12 Sensor-Side Connection
L1 Labeled

6.1 Wiring Diagram and Pin Assignment (Sensor Side)

Anschlussschema Sensorseite
Figure 3. Connection Diagram and Pin Assignment for the Sensor Side of the AION420

6.2 Connection Diagram and Pin Assignment for the Supply Side of the Terminated Version

Anschlussschema Supply Seite
Figure 4. Connection diagram and pin assignment for the supply side of the terminated version

Pin configuration for direct connection of a 4–20 mA sensor. The device is powered via the supply connection by an external power supply and forms the end point of the measurement chain.

This version is not designed to pass on the 4–20 mA signal . The terminated version is particularly suitable for new installations or applications in which the sensor is detected exclusively by the AION420.

6.3 Connection Schematic and Pin Assignment (Supply Side) for the Looped Version

Anschlussschema und Pinbelegung der Supply-Seite für die geschleifte AION420 Version
Figure 5. Connection diagram and pin assignment of the supply side for the looped version

In addition to providing power, the looped-through version of the AION420 also allows the 4–20 mA signal to pass through. This enables the AION420 to be integrated into existing measurement circuits without interfering with the existing signal processing.

The measurement signal is acquired by the device and simultaneously forwarded to downstream systems, such as PLCs, data loggers, or process control systems.

This design is particularly suitable for retrofits and applications where the existing infrastructure is to continue to be used.

AION420 Technical Drawing


Supported radio technologies
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