KB027 How can multiple sensors be connected on a single line / cable?

Up to 100 sensors can be connected to one line via the RS-422 or RS-485 interfaces. In this case, a different ID must be configured for each of the sensors, so that all sensor can be addressed by the controller.
It is mandatory to use a twisted pair cable which is terminated with a termination resistance of 100-150 ohms.
In certain applications, it is necessary that the sensors measure permanently (tracking mode). So that the line is not blocked, the Tracking with Buffering (sNf) in the sensor must be activated for this purpose. The controller can then read the result from each sensor with the command sNq (N is replaced by the ID of the sensor).

Further details in the Technical Reference Manual under RS-422/485 interface (see Downloads).