ABB Industrial IT enabled REX 521 Technical Reference Manual, General page 53

Protection relay

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Technical Reference Manual, General

Hardware versions ........................................................................................ 8

HMI ............................................................................................................ 33

Internal power supply ................................................................................. 14

Internal relay fault ...................................................................................... 24

IRF output................................................................................................... 24

IRF, VHH Internal relay fault

Isolated RS-485 connection.................................................................. 26, 27

labels........................................................................................................... 35

LED label.................................................................................................... 35

Measuring devices

Technical data....................................................................................... 16

Non-volatile memory.................................................................................. 13

Optical RS-232 interface ............................................................................ 32

Order number .............................................................................................. 15

Ordering REX 521 protection relays.......................................................... 48

Outputs ....................................................................................................... 19

High-speed power output ..................................................................... 19

Signalling relay outputs........................................................................ 20

Single-pole power outputs.................................................................... 20

Testing .................................................................................................. 21

Overtemperature indication ........................................................................ 15

Parameterization ......................................................................................... 10

Power output (PO)...................................................................................... 37

Power outputs ............................................................................................. 38

Power supply modules................................................................................ 14

Protocols

IEC 60870-5-103 ................................................................ 26, 31, 33, 55

LON.................................................................................... 26, 27, 29, 33

Modbus .................................................................................................31

SPA............................................................................... 26, 27, 30, 33, 63

Rated values................................................................................................ 15

Real-time clock........................................................................................... 13

Rear port options ........................................................................................ 27

Relay parameters ........................................................................................ 63

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