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 s 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