Station Communication Rear Connection - ABB Relion Technical Manual

1MRK 502 048-UUS A
18.4.2
18.4.3
18.4.4
Technical manual

Station communication rear connection

The default IP address of the IED through the Ethernet connection is 192.168.1.10. The
physical connector is X1/LAN1. The interface speed is 100 Mbps for the 100BASE-FX
LC alternative.
If the COM03 communication module is used, the X1/LAN1 A should be used. For
redundant kommunication, X1/LAN A and X2/LAN B should be used. LAN2 A is not
used in this product.
Optical serial rear connection
Serial communication can be used via optical connection in star topology. Connector type
is glass (ST connector). Connection's idle state is indicated either with light on or light off.
The physical connector is X9/Rx,Tx.
EIA-485 serial rear connection
The communication module follows the EIA-485 standard and is intended to be used in
multi-point communication.
For the complete list of available connection diagrams, please refer to Section
diagrams.
For four-wire connections, to terminate far end of the RS485 bus with the built-in 120 ohm
resistors, connect X8:4 – 11 for Tx and X8:2 – 9 for Rx. This can be set via the local HMI
under Configuration/Communication/Station communication/RS485 port/
RS485GEN:1/WireMode = Four-wire.
For two-wire connections, to terminate far end of the RS485 bus with the built-in 120 ohm
resistors, connect X8:4 - 11. This can be set via the local HMI under Configuration/
Communication/Station communication/RS485 port/RS485GEN:1/WireMode =
Two-wire.
Configure one of the node on the bus with BIAS (On) in order to set the bus signals on a
defined level and non-floating which makes the bus more robust to disturbances. This can
be set via the local HMI under Configuration/Communication/Station
communication/RS485 port/RS485GEN:1/BIAS = On/Off.
To use the chassis grounds (grounding the cable shield, for example), the cable shield
should be grounded on one end at X8:8 (direct ground) and at the other end at X8:1 (via
capacitor).
Section 18
IED physical connections
Connection
721