Table 743: COM2 serial connection X5 EIA-485/ X12 Optical ST
Group
Jumper connection
Description
X27
1-2
2-3
EIA-485
Optical ST
X28
1-2
2-3
EIA-485
Optical ST
Table 744: 2-wire EIA-485 jumper connectors for COM2
Group
Jumper connection
Description
X13
1-2
2-3
A+ bias enabled
A+ bias disabled
X14
1-2
2-3
B- bias enabled
B- bias disabled
X15
1-2
2-3
Bus termination enabled
Bus termination disabled
Table 745: 4-wire EIA-485 jumper connectors for COM2
Group
Jumper
connection
Description
Notes
X13
1-2
2-3
A+ bias enabled
A+ bias disabled
COM2
4-wire TX channel
X14
1-2
2-3
B- bias enabled
B- bias disabled
X15
1-2
2-3
Bus termination enabled
Bus termination disabled
X17
1-2
2-3
A+ bias enabled
A+ bias disabled
4-wire RX channel
X18
1-2
2-3
B- bias enabled
B- bias disabled
X19
1-2
2-3
Bus termination enabled
Bus termination disabled
1MRS758755 C
Protection relay's physical connections
REC615 & RER615
Technical Manual
847
Содержание Relion REC615
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