ABB RELION 670 Series Technical Manual page 1129

1MRK 502 066-UUS B
Data
IEC09000758 V3 EN-US
Figure 587: Redundant station bus
18.5 IEC 61850-9-2LE communication protocol
18.5.1 Introduction
The IEC/UCA 61850-9-2LE process bus communication protocol enables an IED to communicate
with devices providing measured values in digital format, commonly known as Merging Units
(MU). The rear access points are used for the communication.
Technical manual
Station Control System
Duo
Data
Switch A
1 2
AB CD
Configuration OEM
PRP
=IEC09000758=3=en=Original.vsd
Redundancy
Supervision
Data
Switch B
1 2
Data
IED
PRPSTATUS
Section 18
Station communication
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