Technical data

82
1MRS751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
H
Hardware versions .................................................................................... 16
HMI .......................................................................................................... 45
I
Internal power supply ............................................................................... 22
Internal relay fault .................................................................................... 33
IRF output ................................................................................................ 34
IRF, see Internal relay fault
Isolated RS-485 connection ............................................................... 36, 37
L
labels ........................................................................................................ 46
LED label ................................................................................................. 46
M
Measuring devices
Technical data .................................................................................... 25
Modbus ..................................................................................................... 36
N
Non-volatile memory ............................................................................... 22
O
Optical RS-232 interface .......................................................................... 41
Order number ........................................................................................... 24
Ordering REX 521 protection relays ........................................................ 61
Outputs ..................................................................................................... 28
High-speed power output ................................................................... 28
Signalling relay outputs ...................................................................... 30
Single-pole power outputs .................................................................. 29
Testing ................................................................................................ 30
Overtemperature indication ...................................................................... 23
P
Parameterization ....................................................................................... 19
Power outputs ........................................................................................... 49
Power supply modules ............................................................................. 23
Protocols
DNP 3.0 ........................................................................................ 36, 42
IEC 60870-5-103 .............................................................. 36, 40, 44, 65
IEC 61850 .......................................................................................... 43
LON .................................................................................. 36, 37, 39, 44
Modbus ............................................................................................... 41
Profibus .............................................................................................. 43
SPA ............................................................................ 36, 37, 39, 44, 73