Ethernet Rear Connections - ABB RELION Series Technical Manual

Section 13
Protection relay's physical connections
13.4.2
13.4.3
13.4.4
13.4.5
768

Ethernet rear connections

The Ethernet station bus communication module is provided with either galvanic
RJ-45 connection or optical multimode LC type connection, depending on the product
variant and the selected communication interface option. A shielded twisted-pair
cable CAT 5e is used with the RJ-45 connector and an optical multi-mode cable (≤2
km) with the LC type connector.
In addition, communication modules with multiple Ethernet connectors enable the
forwarding of Ethernet traffic. The variants include an internal switch that handles the
Ethernet traffic between an protection relay and a station bus. In this case, the used
network can be a ring or daisy-chain type of network topology. In loop type topology,
a self-healing Ethernet loop is closed by a managed switch supporting rapid spanning
tree protocol. In daisy-chain type of topology, the network is bus type and it is either
without switches, where the station bus starts from the station client, or with a switch
to connect some devices and the protection relays of this product series to the same
network.
The protection relay's default IP address through rear Ethernet port is 192.168.2.10
with the TCP/IP protocol. The data transfer rate is 100 Mbps.
EIA-232 serial rear connection
The EIA-232 connection follows the TIA/EIA-232 standard and is intended to be used
with a point-to-point connection. The connection supports hardware flow control
(RTS, CTS, DTR, DSR), full-duplex and half-duplex communication.
EIA-485 serial rear connection
The EIA-485 communication module follows the TIA/EIA-485 standard and is
intended to be used in a daisy-chain bus wiring scheme with 2-wire half-duplex or 4-
wire full-duplex, multi-point communication.
The maximum number of devices (nodes) connected to the bus where
the protection relay is used is 32, and the maximum length of the bus
is 1200 meters.
Optical ST serial rear connection
Serial communication can be used optionally through an optical connection either in
loop or star topology. The connection idle state is light on or light off.
Using ST loop mode requires an ST serial converter that supports
detecting and removing of duplicate request after transmission trough
full circle.
1MRS758755 A
REC615 and RER615
Technical Manual