ABB REX 521 - Page 59

1MRS 751108-MUM
REX 521
59
Protection Relay
Technical Reference Manual, General
G
Graphical I/O Setting Tool .......................................................................16
H
Hardware versions ....................................................................................12
HMI ..........................................................................................................40
I
Internal power supply ...............................................................................18
Internal relay fault ....................................................................................29
IRF output .................................................................................................29
IRF, see Internal relay fault
Isolated RS-485 connection ................................................................31, 32
L
labels .........................................................................................................42
LED label ..................................................................................................42
M
Measuring devices
Technical data .....................................................................................20
Modbus .....................................................................................................32
N
Non-volatile memory ................................................................................17
O
Optical RS-232 interface ..........................................................................38
Order number ............................................................................................19
Ordering REX 521 protection relays ........................................................57
Outputs .....................................................................................................23
High-speed power output ...................................................................24
Signalling relay outputs ......................................................................25
Single-pole power outputs ..................................................................24
Testing ................................................................................................25
Overtemperature indication ......................................................................19
P
Parameterization .......................................................................................14
Power output (PO) ....................................................................................44
Power outputs ...........................................................................................45
Power supply modules ..............................................................................18
Protocols
DNP 3.0 ........................................................................................32, 39
IEC 60870-5-103 ..............................................................32, 37, 40, 63
LON ..................................................................................32, 33, 35, 40
Modbus ...............................................................................................37
SPA .............................................................................32, 33, 36, 40, 71