ABB RTU520 Communication Unit 520CMD01
The ABB RTU520 Communication Unit 520CMD01 is a key component of the RTU520 product line, primarily responsible for managing communication within the RTU520 system. Here is a detailed introduction:
- I/O Module Management: It manages and controls the RTU520 I/O modules through the serial I/O bus, reads process events from input modules, and sends commands to output modules.
- Communication Interface Handling: It communicates with control systems and local HMI systems via serial interface (RS232) and Ethernet 10/100BaseT interfaces. It also communicates with sub - RTUs, IEDs, or multimeter devices through the RS485 interface. In addition, it manages the time - base station of the RTU520 product line and synchronizes I/O modules, and handles the dialogue between the RTU520 product line and web browsers through the LAN interface.
- Protocol Processing: It can handle Ethernet - based and UART character - based communication protocols.
- Processor: It uses the ARM9 controller AT91SAM9260 to implement a real - time operating system, which is responsible for interface management, event processing, time - base, and internal database management. The controller acts as the master of the serial I/O bus (WRB).
- Storage: System - related configuration files are stored in a non - volatile flash card (removable SD card™) to ensure the validity of system configuration after power - on reset (PoR).
- Interfaces: It is equipped with various interfaces, including Communication Port 1 (CP1) which is an RS232C serial interface with an RJ45 connector; Communication Ports 2 and 3 (CP2 and CP3) which are RS485 serial interfaces with RJ45 connectors; an Ethernet interface (E1) which is 10/100BaseT with an RJ45 connector; Interface X1 for powering the power supply unit 520PSD01; Interface X2 for communicating with RTU520 I/O modules; a USB 2.0 device interface for diagnosis and maintenance; and a WRB I/O bus interface for local communication with I/O modules.
