The Victron GX IO-Extender 150 adds extra digital inputs and relay outputs to compatible GX devices, for installations where the onboard GX I/O is already fully allocated. It connects directly to the GX device and is managed through the existing VenusOS interface, with no separate app or controller needed.

Key features

• I/O expansion, extends the digital input and relay output capacity of compatible Victron GX devices.
• Native VenusOS integration, configured and monitored through the same menus as the built-in GX I/O.
• Digital inputs, for monitoring external signals such as generator run status, door contacts or tank level switches.
• Relay outputs, for controlling external loads, alarms or generator start/stop circuits.
• Weight, 0.18 kg, compact enough to fit inside existing enclosures.

Product overview

GX devices such as the Cerbo GX have a fixed number of digital inputs and relay outputs. On larger or more complex systems these are used up quickly by generator control, tank monitoring, alarm outputs and switching. The GX IO-Extender 150 adds further I/O channels that appear within the same VenusOS environment, so the whole system stays managed from one place.

Because the extender works at firmware level rather than as a third-party add-on, its inputs and outputs sit in the same menus used for the native GX I/O. That matters on commercial, marine or off-grid installations that need several monitored inputs and controlled outputs from a single GX device.

Applications

• Expanding I/O on Cerbo GX or other compatible GX devices in larger off-grid systems.
• Generator start/stop control where the native relay outputs are already in use.
• Marine installations needing multiple tank level, bilge or door contact inputs.
• Commercial battery storage systems with several alarm or switching outputs.
• Remote monitoring setups needing additional digital signal inputs.

What's in the box

• 1 x Victron GX IO-Extender 150

Installation notes

Fitting should be carried out by a qualified electrician or experienced Victron installer. Check compatibility with your GX device and VenusOS firmware version first. Wiring to generator control circuits or alarm systems must follow the relevant regulations, and grid-connected systems must remain compliant with G98 or G99 as applicable.