P.3.272
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
87L Communication and Timing
Figure 3.185 Typical Ethernet Connections
If two Ethernet networks are available, Port 5A is the primary port and Port
5B is the secondary port. The relay will communicate on the primary port as
long as this channel is healthy. If the primary channel fails, then the relay will
communicate on the other port.
Figure 3.186 shows an example of a relay connected to a redundant Ethernet
network.
Figure 3.186 Redundant Ethernet Connection
Ethernet MAC Address Settings
When using Ethernet the relay uses MAC addresses to identify the relays that
make up the 87L zone. These settings are similar to the serial address settings
described in the section on serial communications. They are used to ensure
that the local relay is exchanging data with the intended remote relay(s). The
setting 87LTMAC specifies the address of the local relay. The settings
5A
Relay
10BASE-T
5A/5B
MUX
5A
Relay
10BASE-T
5A/5B
MUX
10/100BASE-T 100BASE-FX
RJ45 RJ45 LC LC
5A
Relay
MUX (1)
5B
MUX (2)
Table 3.143 Ethernet MAC Address Settings
Setting Description Range Default
87LTMAC MAC address for 87L transmit 01-30-A7-XX-XX-XX
a
a
XX are hexadecimal values, each in the range of 00–FF.
01-30-A7-01-01-01
87LMAC1 MAC for 87L Remote 1 receipt 01-30-A7-XX-XX-XX 01-30-A7-01-01-02
87LMAC2 MAC for 87L Remote 2 receipt 01-30-A7-XX-XX-XX 01-30-A7-01-01-03
87LMAC3 MAC for 87L Remote 3 receipt 01-30-A7-XX-XX-XX 01-30-A7-01-01-04
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