Hitachi Relion 670 Series Applications Manual page 367

1MRK506375-UEN Rev. N
PRP-1 should be used primarily, PRP-0 is intended only for use in existing PRP-networks. PRP-1
and HSR can be combined in a mixed network.
If the access point is not taken into operation, the write option in Ethernet Configuration Tool can be
used to activate the access point.
IEC16000039 V1 EN-US
Figure 180:
17.3 Merging unit
17.3.1 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.
Railway application RER670
Application manual
ECT screen with Redundancy set to PRP-1 on Access point 1 and HSR Access
point 3
When configuring RER670 for 9-2LE streams in a 16.7Hz system, the IED shall be set to
16.7Hz and the MU to 50Hz (4kHz sampling).
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IEC16000039-1-en.vsdx
Section 17
Ethernet-based communication
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