Once MDR’s and photo-sensors have been connected based upon the desired conveyor arrangement (1 zone, 2 zone, dual motor zone, etc.); all the ConveyLinx Modules that make up the linear conveyor arrangement need to be interconnected with shielded Ethernet cables (Hardware Rev.1 modules must use shielded crossover Ethernet cables) and each module needs to receive a 24VDC power connection. The Power Plug connection is the power source for all logic, photo-sensors, and MDR’s.
Multiple power supplies should have their DC Common terminals connected together as shown:

Learn about power supply sizing