28
1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
4.1.12.6.
IEC 60870-5-103 bus
The REX 521 includes an unbalanced IEC 60870-5-103 slave communication
interface.
The interface provides a fixed cross-coupling between the REX 521 application
(indications, commands and protection equipment) and the IEC 60870-5-103
protocol application data. The adjustable parameters are “Baud rate” and “Unit
address”. User-selectable measurand sets “Frame type” are available for the
analogue measurement values.
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The physical bus topology is star-based. A star-coupler unit, e.g. RER 125, is needed
for connecting the REX 521 unit to a control system.The line idle state of the fibre-
optic interface is configurable (“light on” and “light off”) with a parameter
“Tx mode”.
For more information about the IEC 60870-5-103 bus, refer to Appendix on page 48.
IECsysrex
ABB Network Partner
O
I
SPAC 331 C
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
Star-coupler unit
e.g. RER 125
IECsysrex
ABB Network Partner
O
I
SPAC 331 C
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
REXFRONT
C
E
START
READY
TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz
Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
RS232C
Star coupler unit
e.g. RER 125
IEC_103/SPA
gateway
SPACOM-relay
REX 521 and other IEC_103 based protection relays
Fibre-optic
modem
Monitoring and
control equipment
e.g. MicroSCADA
Содержание REX 521
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