What are ECC500 Device Cascading Rules ?

To connect cascaded devices to ports on the RS485 expansion card in the ECC500, observe the following rules:
The models of devices cascaded under each port must be the same.
The addresses of devices cascaded under each port must be different.
The addresses of devices cascaded under different ports can be the same.
The number of cascaded devices that can connect to each port:
− The ECC500 collector takes 3 seconds to collect all data from a single device. To meet requirements for the response time, it is recommended that a maximum of two UPSs, two ATSs, two PDU8000s, and two precision air conditioners connect to each port.
− Independently deployed AI/DI modules and temperature and humidity (T/H) sensors need to be powered by the ECC500 collector. A maximum of two independently deployed AI/DI modules and eight T/H sensors can connect to each port.
The distance between the ECC500 collector and its connected device should be less than 50 meters. If the site distance is greater than 50 meters, contact Huawei technical support.