Applications

The 520CMD01 Communication Unit is the CMU module of the RTU520 product family.

Its main tasks are

– Managing and controlling the RTU520 I/O modules via the serial I/O bus.

– Reading process events from the input modules.

– Sending commands to the output modules.

– Communication with the control system and the local HMI system via the www.abb-drive.com serial interface (RS232) and the Ethernet 10/100BaseT interface.

– Communicates with sub RTUs, IEDs or multimeter devices via interface (RS485).

Communicates with sub-RTUs, IEDs, or multimeter devices through an interface (RS485).

– Manages the time base station and synchronisation I/O modules of the RTU520 product line.

– Handles the dialogue between the RTU520 product line via the LAN interface and the RTU520 product line via the LAN interface and a web browser.

The communication unit is mounted on a DIN rail together with the power supply and I/O modules.

The communication unit handles communication protocols based on Ethernet and UART characters.

The unit is available in two versions

– R0001: Real-time clock without battery buffer (RTC)

– R0002: Real-time clock with battery buffer (RTC)

Features

A real-time operating system is implemented by applying the ARM9 controller AT91SAM9260.

520CMD01 is responsible for interface management, event processing, time base and internal database.

The 520CMD01 is responsible for interface management, event processing, time base and internal database. The controller acts as a master for the serial I/O bus (WRB).

System-related configuration files are stored on a non-volatile flash memory card (Removable SD Card™).

to ensure that the system configuration is valid after a power-on reset (PoR).

An optional battery-buffered RTC is used to maintain accurate time in the event of a power failure.

The communication unit provides the following interfaces:

– Communication Port 1 (CP1): RS232C serial interface with RJ45 connector.

– Communication ports 2 and 3 (CP2 and CP3): RS485 serial interface with RJ45 connector.

– Ethernet Interface (E1): 10/100BaseT with RJ45 connector.

– Interface X1 for power supply to the power supply unit 520PSD01.

– Interface X2 for communication with the RTU520 I/O module.

– USB 2.0 device interface for diagnostics and maintenance.

– WRB I/O bus interface for local communication with the I/O module.