A RM4200D consists of one DSP frame or of one DSP frame with Control Modules connected via CAN bus. In the following, a system like that will be called a Device. (Find more details in the volume System Reference of this manual.)

Several Devices can be coupled via Ethernet and the UDP protocol and are able to exchange Global Functions if configured correctly. Global Functions are Global Logics and Global Potentiometers.

	Note
	Global Logics mean that a RM4200D can control parts of another RM4200D. To enable that, both systems have to be configured appropriately and be able to exchange data via the UDP protocol.

Generally, each Device works independently from all other Devices. If a Device is switched off or disconnected from other Devices, only the exchanged functions stop working.

To make the configuration process easier and secure the assignment of the Devices, the Devices belonging together are managed by the Toolbox4 software within one project. Each project has a Project ID which is the same for all Devices in the project. It is saved in all Devices of a project during the upload. When creating a new project, its ID is generated by a random number generator, but it can be changed by hand afterwards.

	Important
	If Global Functions are to be exchanged between two or more RM4200, the Project IDs of the Devices must be identical. If this is not the case, the Global Functions do not work.

On the other hand, several RM4200D projects do not influence each other in a network, if they have different Project IDs.

Only the Global Logics 1 to 50 can be exchanged via the serial RS232 port of the RM4200D. This communication is compatible to the predecessing product RM3200D. Global Potentiometers are not supported by the serial port of the RM4200D.

If several RM4200D are connected with each others, the audio connections they have in common (MADI, Analog, Digital AES3/EBU) can be managed easier using Device Links. This works only when the connected Devices are located in the same project. (see Device Links)