ABB REX 521 Technical Reference Manual, General

36
1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
lonsysrex_a
Fig. 4.1.12.6.-1 Example of a LON-based substation automation system
In the system described in the figure above, communication is usually arranged as
shown in the table below.
The LAG 1.4 default communication settings may be loaded by selecting Execute
from the HMI
(Configuration\Communication\Comm.settings\LON\Load def
config.). This operation blanks the internal EEPROM and boots the Neuron chip.
Thereafter, the default communication settings are loaded and stored into the
Neuron chip. This operation takes approximately 15 seconds according to LAG 1.4.
1
From the front panel, the user should configure the Node number, the Subnet
number and the Bit rate of REX 521 device.
The LON bus event buffer includes 150 last events.
Data type
REX ↔ MicroSCADA
Events and alarms sliding window protocol
Control commands sliding window protocol
transparent SPA bus messages
Status of breakers and isolators sliding window protocol
Analog measurement values sliding window protocol
Other DI, AI data sliding window protocol
Other DO data transparent SPA bus messages
Parameter data transparent SPA bus messages
Disturbance recorder data file transfer over the LON network
1. In order to succeed, the LON protocol has to be selected as the rear port protocol.
ABB Network Partner
O
I
SPAC 331 C
C
E
F
I
0
RER 103
MicroSCADA
REX52x
REX52x
DI, AI and DO modules
LonMark devices
SPA bus module
connected
over LON/SPA-
gateways
REX 521 protection relays
Electrical LON
network
RER 111 LON
star-coupler
Router card in
RER 111 LON
star-coupler
LON/SPA
gateway
Fibre-optic
LON network
PCLTA card and
RER 107 inside PC
RER 111 LON
SFIBER connection
cards
REF 54_
feeder terminal

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English