Beijer Electronics RBC EN - Manual (Page 17)

Operation
3.3.1 Remote Dimming
The Remote Dimming feature allows building local networks of connected
monitors where any monitor can control the backlight brightness of any other
monitor. If the Remote Control feature of a single monitor is not enabled,
this monitor cannot control other monitors, but it can be controlled by other
monitors.
The following examples show some possible types of monitor networks. The PC
shown in some of the examples can have a display with an RBC module as well.
The built-in monitors have an internal USB connection to the PC and do not
support RS232 or RS485.
Make sure to use every monitor address in a network only one time.
Point-to-Point
Two monitors can control each other, if they are connected via RS232.
Multiple Monitors
More than two monitors can be connected and control each other via an RS485
bus.
Beijer Electronics, MAEN986C 17