ABB RELION 620 Series Technical Manual page 899

1MAC504801-IB E
14.3.5
14.3.6
620 series ANSI
Technical Manual
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.
Communication interfaces and protocols
The communication protocols supported depend on the optional rear communication
module.
Table 618: Supported station communication interfaces and protocols
Interfaces/Protocols
100BASE-TX RJ-45
IEC 61850
MODBUS RTU/
ASCII
MODBUS TCP/IP
DNP3 (serial)
DNP3 TCP/IP
● = Supported
Protection relay's physical connections
Ethernet
100BASE-FX LC
● ●
- -
● ●
- -
● ●
Section 14
Serial
EIA-232/EIA-485 Fibre-optic ST
- -
● ●
- -
● ●
- -
893