Chapter 5 - 7SR157 Installation Guide
© 2018 Siemens Protection Devices Limited
Chapter 5 - Page 15 of 18
6.3
Ethernet Network Redundancy IEC 61850
The EN100 module is used on Reyrolle devices to provide Ethernet/IEC61850 functionality. The EN100 supports
RSTP, PRP & HSR redundancy protocols.
All 7SR157 IEC61850 variants are delivered with the EN100+ (Plus) module and firmware 4.27 or later. The
earlier EN100 (standard) modules are not used in the 7SR157.
The EN100 module firmware can be updated by connecting to the relay via the rear Ethernet port. For more
information on connecting to the relay via the Ethernet port, please see the Reydisp Manager Userguide.
Depending on the EN100 module type and Firmware version, the following protocol options are available:
Interface Type
EN100
Firmware
Line Mode
Switch Mode
RSTP OSM
PRP
HSR
Electrical RJ45 EN100+
4.08 or earlier
Electrical RJ45 EN100+
4.21and later
Optical EN100+
4.08 or earlier
Optical EN100+
4.21and later
Table 1: EN100 Redundancy availability
6.3.1 RSTP – Rapid Spanning Tree Protocol
RSTP is a redundancy protocol with a minimal response time that has been standardized in IEEE-802.1D (2004).
The reconfiguration time depend on the topology and start at 50ms.
RSTP need to be enabled on the device within Reydisp Manager (See Reydisp Manager userguide). Network
rings with up to 30 devices is possible.
Figure: 6.3-1 RSTP Ethernet Network Ring Configuration
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