Solution
An Ethernet relay controller built for AV, not for a lab bench
RELO IO8 is a PoE Ethernet relay controller with 8 relays and 8 inputs. Switch outputs over TCP, UDP, HTTP, OSC or Art-Net, with logic that runs on the device.
What an Ethernet relay is for
An Ethernet relay turns a network message into a physical contact. A control system, a touch panel or a script sends a command over IP, and a relay closes. It is how a screen motor, a projector lift, a door strike or a show effect gets driven by something that only speaks network.
Most Ethernet relay boards stop there. They wait for a command, switch, and wait again. That works on a workbench. In a room that has to run every day, you also want the logic to live somewhere that does not depend on a PC staying on.
What the RELO IO8 adds
The RELO IO8 has eight relay outputs and eight digital inputs, and it runs your logic on the device. You draw a flow in Cueva Desktop, push it to the controller, and it keeps running with the app closed and without internet.
- Control in: TCP, UDP, HTTP/REST, OSC, Art-Net, RTP MIDI and the eight inputs
- Control out: the same protocols, so one button can switch a relay and tell three other systems
- Power: USB-C 5V primary with PoE+ (802.3at) as a live backup, both at once
- Rating: 24V, 400mA per output, on pluggable screw terminals
- Size: a third of a rack unit, three across 1U on the RM99 mount
IP to relay without writing code
Send the string "screen-down" over TCP and relay 1 pulses. Post to an HTTP endpoint and relays 2 to 4 switch to a preset. Move a lighting console fader and a relay follows the Art-Net channel. Each of these is a trigger node wired to an action node, with conditions in between when you need them.
That is also why the RELO IO8 works as relay control software as much as relay hardware. The flow editor has fifty nodes for triggers, conditions, timing, actions and queries, so the logic that would otherwise sit in a PLC or a control processor sits in the relay box itself.
When a board from a marketplace is enough
If you need one relay switched by a hobby project, a low-cost Ethernet relay board will do it. The RELO IO8 is for installations that someone gets paid to keep running: PoE+ redundancy, logic that survives a reboot, remote status through Cueva Horizon, and a manufacturer you can call.
Questions
Common questions.
No. Each output is rated 24V at 400mA, which is right for dry contact control inputs, screen and lift controllers, and low voltage loads. For mains loads, switch a contactor or a power distribution unit with a control input.
Yes. It takes PoE+ (802.3at) and USB-C 5V at the same time, so the unit stays up if either supply drops. The USB-C supply with EU, UK and USA heads is in the box.
TCP, UDP, HTTP/REST, OSC, Art-Net and RTP MIDI, plus the eight physical inputs. Any of them can trigger a flow, and a flow can switch, toggle or pulse any relay.
No. Flows run on the device. Cueva Desktop is only needed to build and deploy them, and Cueva Horizon is optional for remote monitoring.
The RELO IO8 is €599 excluding VAT, with twelve months of Cueva Horizon included.
Start with one. Scale when you need to.
Order the RELO IO8 from our store, or talk to us about your project.