ABB RELION 620 Series Technical Manual page 897

1MAC504801-IB E
14.3.1
620 series ANSI
Technical Manual
Depending on order code, several rear port communication connections are available.
• Galvanic RJ-45 Ethernet connection
• Optical LC Ethernet connection
• ST-type glass fibre serial connection
• EIA-485 serial connection
• EIA-232 serial connection
Fibre optic equipment and cables are very sensitive to dust and dirt.
Handle them with care. If the fibre is disconnected from the modem, set
the protective hood on the transmitter/receiver. Keep the protective hood
on during transportation.
If contaminated, clean optical connectors with a cleaning stick.
Recommended cleaning fluids are methyl alcohol, ethyl alcohol,
isopropyl alcohol or isobutyl alcohol.
Ethernet RJ-45 front connection
The protection relay is provided with an RJ-45 connector on the LHMI. The connector is
mainly 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 the 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.
Protection relay's physical connections
Section 14
891