Always install dust caps on unplugged fiber connectors.
If contaminated, clean optical connectors only with fiber-optic cleaning
products.
13.4.1
Ethernet RJ-45 front connection
The protection relay is provided with an RJ-45 connector on the LHMI. The
connector is intended for configuration and setting purposes. The interface on the
PC side has to be configured in a way that it obtains the IP address automatically.
There is a DHCP server inside protection relay for the front interface only.
The events and setting values and all input data such as memorized values and
disturbance records can be read via the front communication port.
Only one of the possible clients can be used for parametrization at a time.
• PCM600
• LHMI
• WHMI
The default IP address of the protection relay through this port is 192.168.0.254.
The front port supports TCP/IP protocol. A standard Ethernet CAT 5 crossover cable
is used with the front port.
The speed of the front connector interface is limited to 10 Mbps.
13.4.2
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. These variants include an internal Ethernet 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.Internal Ethernet switch MAC
table size is 512 entries. All Ethernet ports share this one common MAC table.
Communication modules including Ethernet connectors X1, X2, and X3 can utilize
the third port for connecting any other device (for example, an SNTP server, that is
visible for the whole local subnet) to a station bus.
1MRS757644 H
IED physical connections
620 series
Technical Manual
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