Firmware version 4.7.1
We recommend that you upgrade your device to this firmware version.
Release date: March 2026
Download link: ION9000 series firmware release download page
In this topic
What's new
This section lists what's new in firmware version 4.7.1.
MQTT
MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol used for data exchange between your meter and external systems.
Key benefits:
-
Publishes samples from up to 30 sources per update.
-
Publishes data using TLS encryption and optional authentication to the broker.
-
Uses QoS 0 publishing (no confirmation)—ideal for high-speed communications.
Learn more:
- MQTT
- For more information on the MQTT Export Module,
Subsynchronous oscillation monitoring
Subsynchronous oscillation monitoring helps identify oscillations below the power system's fundamental frequency. Subsynchronous oscillations can affect system stability. Use subsynchronous oscillation monitoring to help detect events and trigger actions, such as recording waveform captures or publishing data using MQTT.
Key benefits:
- Identifies the ten highest-magnitude frequency components below 50 Hz.
- Updates calculations approximately every second using the last 10 seconds of data.
- Lets you configure frequency groups to focus on frequencies that are most relevant to your system.
Learn more:
- Subsynchronous oscillation monitoring
- For more information on the Subsynchronous Oscillation Module,
Restart the meter using the display
You can now restart the meter using the device display.
Note: Only users with security configuration access can restart the meter using the display.
Learn more:
6 digital output option module support
Adds support for the 6 digital output option module.
The 6 digital output option module expands your meter’s capabilities by providing six additional configurable digital outputs.
NOTE: Firmware version 4.7.1 or later is required to use the 6 digital output option module with your meter.
Learn more:
Before upgrading
- Back up all meter data.
- Install ION Setup v3.2.26041.03 or later.
Learn more:
- For details on what to back up in your meter and how to get the latest ION Setup, see Meter firmware upgrade prerequisites.
Firmware upgrade procedure
For details on how to upgrade the meter firmware, see Firmware upgrades.