What Is a 5 Channel Modbus Relay Extender and When Do You Need One?
In many real HVAC and building automation projects, the limiting factor is not software or network capacity, but something much more basic: you simply run out of relay outputs where you need them most. The room-level version of this, including turning a 0–10 V fan signal into stepped relays, is in 5-stage relay control. A…









