ABB Industrial IT enabled REX 521 - Page 4

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Technical Reference Manual, General
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4.1.12.1.Optical communication port on the rear panel ...26
4.1.12.2.Isolated RS-485 connection on the rear panel ..27
4.1.12.3.Front panel optical connection for a PC .............27
4.1.12.4.The service pin located on the rear panel ..........27
4.1.12.5.SPA bus .............................................................27
4.1.12.6.LON bus ............................................................29
4.1.12.7.IEC 60870-5-103 bus ........................................31
4.1.12.8.Modbus bus .......................................................31
4.1.13.Time synchronization .......................................................32
4.1.14.Display panel (HMI) .........................................................33
4.1.15.Indication LEDs ...............................................................34
4.1.16. Alarm LEDs ....................................................................34
4.1.16.1.Special features of alarm LEDs .........................34
4.1.16.2.Writing signal names on alarm LED label ..........35
4.2. Design description ......................................................................37
4.2.1. Technical data ........................................................37
4.2.2. Terminal diagram of REX 521: Basic ...............................41
4.2.3. Terminal diagram of REX 521: Medium ...........................42
4.2.4. Terminal diagram of REX 521: High ................................43
4.2.5. Terminal diagram of REX 521: Sensor ............................44
4.2.6. Terminal connections ......................................................45
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7.1. Revision identification .................................................................49
7.2. Changes and additions to earlier released revision B ................49
7.3. Configuration, setting, and SA system tools ...............................50
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10.1.Functions supported by REX 521 ..............................................55
10.2.General principle of application data mapping ...........................55
10.3.Principle of the protection functions mapping ............................56
10.4.Class 2 data ...............................................................................56
10.5.Default mappings .......................................................................57
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