Victron GX IO-Extender 150 – I/O Expansion for GX Systems
Free shipping over $49
60-day hassle-free returns
The Victron GX IO-Extender 150 is a compact, professional-grade expansion module that adds input, output, and automation capability to a Victron GX system — without the cost or complexity of adding another GX device. It's built for marine, off-grid, and industrial installs where you need to read extra sensors or switch extra loads from the same Venus OS dashboard.
The IO-Extender connects directly to a GX device (such as the Cerbo GX or Ekrano GX) over USB and is powered from that port — no separate supply needed. Everything is configured and controlled through the GX Switch pane, the VRM portal, and Node-RED, so you can build anything from simple switching to fully custom automation logic, locally or remotely.
What it adds to your GX system
- 8 digital I/O channels — configurable as 8 inputs, 8 outputs, or 4 inputs + 4 outputs, set up in the GX interface and Node-RED. Inputs accept 3.8–5.5 V; outputs are 5 V (4 mA max). Each channel has an LED state indicator. (Isolated from USB.)
- 4 PWM outputs — 5 V, 8-bit resolution at 1.5625 kHz, for proportional control of compatible devices such as dimmable lighting or variable-speed equipment. Per-channel LEDs. (Isolated from USB.)
- 2 latching (bi-stable) relays — potential-free, and they hold their state through a power loss. Contact rating (resistive): DC 3 A @ 30 V, 1 A @ 60 V, 0.3 A @ 220 V (90 W max); AC 2 A @ 60 V, 1 A @ 125 V, 0.5 A @ 250 V (125 VA max).
- Solid-state DC switch — silent, efficient load control up to 4 A, for battery systems up to 70 VDC. (Isolated from USB.)
- Tool-free spring terminals — fast, secure wiring in tight cabinets.
Installer note — driving a relay from a digital output: the digital outputs source only 4 mA max. At 4 mA the internal 560 Ω series resistor drops 2.24 V, leaving about 2.76 V at the output — not enough to pull in a relay coil. To switch a relay or any real load from a digital output, drive it through a transistor or FET, or use the built-in latching relays / solid-state switch instead.
Specs
| Supply | Powered by USB |
| Power consumption | < 100 mW idle; max 1 W (< 200 mA @ 5 V) |
| Digital I/O | 8, isolated from USB; configurable 8 in / 8 out / 4+4; inputs 3.8–5.5 V, outputs 5 V (4 mA max) |
| PWM output | 4 channels, 5 V, 8-bit @ 1.5625 kHz, isolated from USB |
| Latching relays | 2, potential-free, bi-stable (ratings above) |
| Solid switch | Max 70 VDC, max load 4 A, isolated from USB |
| Mounting | Wall or DIN-rail (with DIN adapter accessory) |
| Dimensions (H×W×D) | 123 × 67 × 23 mm |
| Weight | 0.170 kg |
| Operating temperature | −20 °C to +50 °C |
Why buy from Blue Marine
Blue Marine is an authorized Victron Energy dealer. Every GX IO-Extender 150 ships brand-new with the full 5-year Victron warranty, free shipping, and local pickup available. Planning custom automation or extra switching on a Victron system? Ask us — we run Node-RED on real boats and can help you scope the I/O.
Warranty Information
Shipping & Returns
We offer free shipping over $49. Lithium batteries & oversize items may have an applicable shipping charge.
We know returns are no fun so we aim to make the return process as hassle free as possible! We have a 60-day return policy, which means you have 60 days after receiving your item to request a return.
Lithium batteries and products with lithium batteries inside are non returnable: Due to carrier regulations surrounding the shipment of lithium batteries (classified as a fully regulated hazardous material), we are unable to accept returns unless arranged locally. We appreciate your understanding and encourage you to contact us with any questions prior to purchase.
For more information on returns, visit our return policy page.
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