The Victron GX-IO Extender 150 adds eight configurable digital I/O channels and a PWM output to a compatible GX device.
Eight channels can be used as eight inputs, eight outputs, or four of each. That flexibility is what makes it worth fitting rather than a fixed-function relay board, since a boat’s requirements change as equipment is added.
Inputs read sensors and switches; outputs drive relays and controlled loads. So a bilge alarm, a tank sensor or a door switch can appear in the same monitoring system as the electrical data, and a pump or a light can be switched from it.
The PWM output supports variable control rather than simple on and off. That suits a fan, a dimmable light or anything else where a proportional signal is needed instead of a switch. Explore more power system monitoring and control.
- Eight in, eight out, or four of each
- Requirements change as equipment gets added
- Sensors and switches join the electrical monitoring
- PWM gives variable control, not just on and off








