ABB Relion 670 Series RES670, Technical Manual

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• Termination (2-wire): Connect pin 1 to pin 3
• Termination (4-wire): Connect pin 1 to pin 3 and pin 4 to pin 6
Soft ground connector pinouts
A second 2-pole screw connector is used for the connection of IO-ground. It can be used
in two combinations like:
• Unconnected: No ground of the IO-part · .
• Soft grounded: The IO is connected to the GND with an RC net parallel with a MOV
21.2.12.3 Technical data
Table 671: Galvanic RS485 communication module
Quantity Range or value
Communication speed 2400–19200 bauds
External connectors RS-485 6-pole connector
Soft ground 2-pole connector
21.2.13 Optical ethernet module (OEM)
21.2.13.1 Introduction
The optical fast-ethernet module is used for fast and interference-free communication of
synchrophasor data over IEEE C37.118 and/or IEEE 1344 protocols. It is also used to
connect an IED to the communication buses (like the station bus) that use the IEC
61850-8-1 protocol (OEM rear port A, B). The process bus use the IEC 61850-9-2LE
protocol (OEM rear port C, D). The module has one or two optical ports with ST
connectors.
21.2.13.2 Functionality
The Optical Ethernet module (OEM) is used when communication systems according to
IEC61850–8–1 or phasor data over IEEE C37.118 have been implemented.
1MRK 511 365-UUS A
Section 21
IED hardware
Phasor measurement unit RES670 2.1 ANSI 797
Technical manual