SMU Monitor Module are used on ETP4830-A1 to monitor the operating status of each component in the power system in real time and performs appropriate intelligent control. When detecting a fault, the SMU generates an alarm. ETP4830-A1 has three types of SMU Monitor Module—SMU01A, SMU01B and SMU01C.

Below shows the conceptual diagram of ETP4830-A1:

AC power enters rectifiers through the AC power distribution unit (PDU). The rectifiers convert the AC power input into -48 V DC power output, which is directed by the DC PDU to DC loads along different routes.

When the AC power is normal, rectifiers power DC loads and charge batteries. When the AC power is absent, rectifiers stop working and batteries start to power loads. After the AC power resumes, rectifiers power DC loads and charge batteries again.

The SMU01A communicates with Huawei Network Ecosystem (NetEco) and third-party network management systems (NMSs) over various security protocols, such as the Simple Network Management Protocol (SNMP) and Hypertext Transfer Protocol Secure (HTTPS), featuring flexible networking. It provides WebUI and implements remote unattended management.

Connecting the Communications Cable

Connect a communications cable to the COM port on the SMU01A when you use the Web UI, NetEco, or SNMP to remotely manage the power supply system, as shown in figure below:

The SMU01B supports Huawei master/slave protocols and access network point-to-point protocols, which allows Huawei access network communications equipment to connect to the U2000.

Connecting a Communications Cable to the SMU01B

Connect the COM port on the SMU01B to the corresponding serial port on the Huawei access network communications equipment using a communications cable when you use the U2000 network management system to remotely manage the power supply system, as shown in figure below:

SMU01C Monitor Module supports 2 digital input, 4 dry contact; supports RS232/485 Communication port.