The ECU is a mandatory PCB module for M Class PA/GA systems. The ECU manages the internal process of data collection and presents data to the dedicated LAN on demand. The ECU is a compact DIN rail mounted module, powered from the local PA/GA rack.
The ECU includes onboard battery backup. The health of the battery is monitored by the ECU management system and the M Class server is notified when batteries need to be changed (typically within a 5 year period).
The ECU reports status to the Server on a regular basis. However, the Server is not considered as a critical path and may go off-line at any time. The ECU includes the option to log system events to an optional onboard SD Card (2GB of storage would allow in excess of 300,000 events to be recorded with a timestamp). Larger SD Cards would extend event log capacity further.
The ECU not only monitors M Class devices in the same rack but also monitors system parameters such as:
- Temperature on the ECU PCB
- System voltage levels
- M Class connectivity
- Battery health
The ECU follow the design philosophy of simple network installation and management. There is no requirement for complex manual network configuration. The M Class network is designed to automatically configure and report to the Server.