Introduction
The SMA Data Manager M (EDMM-20) is a data logger that acts as a System Manager and a system gateway. PV system components and PV systems are integrated into the SMA infrastructure via the SMA Data Manager M. This includes energy generators and loads, I/O systems, sensors and energy meters. The SMA Data Manager M is suited for systems with a maximum total PV or battery power of 7.5 MVA. The SMA Data Manager M supports communication with up to 50 devices, such as PV inverters, battery inverters, energy meters, charging stations and I/O systems.
You can find more information under the following links:
Operating manual SMA Data Manager M
Product description Data Manager M and at www.SMA-Solar.com.
Several Data Managers can be integrated into one system. It is possible to choose between the following device functions:
System Manager
Superordinate System Manager
Subordinate System Manager
System Manager
In this function, the Data Manager works as the sole System Manager for open-loop control or closed-loop control of the system without any other Data Managers in the system.
Superordinate System Manager
In this function, the Data Manager works as client for open-loop or closed-loop control of the system with other subordinate Data Managers. With this option, the superordinate Data Manager forwards the open-loop or closed-loop control commands to the subordinate Data Manager via Modbus. For this, subordinate Data Managers must be integrated as Modbus devices into the system of the superordinate Data Manager. Control-relevant meters at the point of interconnection must be connected to the superordinate Data Manager. Additional devices (up to 50 in total) may be connected to the superordinate System Manager.
Subordinate System Manager
In this function, the Data Manager operates as a subordinate device. With this option, the subordinate Data Manager receives the open-loop and closed-loop control commands of a superordinate device. These commands are forwarded as open-loop control commands to the connected devices. In systems with a superordinate Data Manager, all subordinate System Managers must first be commissioned and their Modbus server interface activated to be able to integrate them into the system of the superordinate Data Manager. In systems with inverters, all inverters must first be commissioned in order to accurately display the system power.
Supported Products
Refer to the following link for an overview of compatible products: "Overview of compatible products" and at www.SMA-Solar.com.
Additional energy meters can be added via user-defined Modbus profiles. Take into account that user-defined Modbus profiles have a cycle time of 1 s (from firmware version 2.6.xx, the cycle time can be parameterized (200 ms, 500 ms, 1000 ms and 5000 ms)). This might be too slow for some applications, e.g. PAV,E export limitation as per VDE AR N 4105.
Routers and network switches:
Energy monitoring
Routers and network switches for Fast Ethernet with a data transfer rate of at least 100 Mbit/s. All network components used must support version 2 or version 3 (IGMPv2 or IGMPv3) of the IGMP protocol. Do not use an IGMP Snooping Switch as per RFC 4541. When using a managed switch, IGMP Snooping must not be activated.
Total overview of the supported products
The figure shows the total overview of the supported devices and does not depict a real system configuration. Not all devices can be operated together in a system.
Additional information on the SMA Data Manager M and its configuration options is available under the following link: Operating Manual SMA Data Manager M and at www.SMA-Solar.com.