08.08.2019, 08:12
there are two separate grounds in this case - DALI and signal/RS485. They are galvanically isolated. They cannot be connected.
When you unite RS485 part GNDs, pay attention to your connection - it is very bad to have GND loop.
If you unite GNDs in DALI lines, its recommended to make sure you are running GND from each of these RS485/DALI devices to LogicMachine via separate wire (note that each of these wires is carrying potential and basically is resistor. It differs depending on the wire length).
If you are powering DALI sides from one power supply, you are galvanically uniting them. Which means, if there is some distortion one one ballast, it will appear on all ballasts on all lines. So it is a good practice to use separate power supplies in each DALI line.
When you unite RS485 part GNDs, pay attention to your connection - it is very bad to have GND loop.
If you unite GNDs in DALI lines, its recommended to make sure you are running GND from each of these RS485/DALI devices to LogicMachine via separate wire (note that each of these wires is carrying potential and basically is resistor. It differs depending on the wire length).
If you are powering DALI sides from one power supply, you are galvanically uniting them. Which means, if there is some distortion one one ballast, it will appear on all ballasts on all lines. So it is a good practice to use separate power supplies in each DALI line.