IEC16000039 V1 EN
Figure 320: ECT screen with Redundancy set to PRP-1 on Access point 1 and
HSR Access point 3
19.3 Merging unit
19.3.1 Application
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.
The merging units (MU) are called so because they can gather analog values from one
or more measuring transformers, sample the data and send the data over process bus
to other clients (or subscribers) in the system. Some merging units are able to get data
from classical measuring transformers, others from non-conventional measuring
transducers and yet others can pick up data from both types.
1MRK 502 071-UEN - Section 19
Ethernet-based communication
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 679
Application manual
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