ABB RELION 670 Series Technical Manual page 1329

1MRK 502 066-UUS B
22.2.13.3 Technical data
Table 1038:Galvanic RS485 communication module
Quantity
Communication speed
External connectors
22.2.14 Optical ethernet module (OEM)
22.2.14.1 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.
22.2.14.2 Functionality
The Optical Ethernet module (OEM) is used when communication systems according to IEC61850–
8–1 have been implemented.
22.2.14.3 Design
The Optical Ethernet module (OEM) is a PMC card and mounted as a mezzanine card on the ADM.
The OEM is a 100BASE-FXmodule and available as a single channel or double channel unit.
Technical manual
Range or value
2400–19200 bauds
RS-485 6-pole connector
Soft ground 2-pole connector
Section 22
IED hardware
SEMOD158678-1 v1
SEMOD158710-2 v2
IP15584-1 v1
M16073-3 v6
M14948-3 v3
M14945-3 v3
1323