IEC16000038-1-en.vsdx
AP1
PhyPortB
PhyPortA
AP1
PhyPortA
PhyPortB
AP1
PhyPortA
PhyPortB
AP1
PhyPortB
PhyPortA
Device 1 Device 2
Device 3
Device 4
IEC16000038 V1 EN-US
Figure 249: HSR ring
13.4 Merging unit
13.4.1 Introduction
GUID-E630C16F-EDB8-40AE-A8A2-94189982D15F v1
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.
Section 13 1MRK 505 384-UEN A
Ethernet
514 Breaker protection REQ650 2.2 IEC
Technical manual
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