The specific feature of the sealed I/O modules is that they allow the use of a remote‐power supply. This means that the same cable transports the bus signals (1 pair) and the power supply of the modules and attached sensors (2 wires).
This feature allows wiring to be simplified. However, a check must be made to ensure that the structure of the chosen connection enables all modules to function correctly.
The number of modules that can be connected depends on the length of the line, the gauge of the electrical wires of the power supply cable and the precision of the power supply.
