Communication Ports; Rs485 Port; Rs485 - GE Multilin 850 Communications Manual

GE
Grid Solutions
8 Series Protective Relay Platform
Chapter 2: Communication Ports

RS485 Port

RS485

8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE

Communication Ports

8 Series protective relays have four communications ports: RS485, WiFi, USB, and Ethernet.
SERIAL
RS485 port: ............................................................Isolated
Baud rates:.............................................................Supports 9600, 19200, 38400, 57600, and 115200 kbps
Response time:.....................................................10 ms typical
Parity: .......................................................................None, Odd, Even
Protocol: ..................................................................Modbus RTU, DNP 3.0, IEC 60870-5-103
Maximum distance: ...........................................1200 m (4000 feet)
Isolation:..................................................................2 kV
On the rear card 8 Series relays are equipped with one RS485 serial communication port
and one 10/100 Mbps Ethernet port. The RS485 port has settings for baud rate and parity.
It is important that these parameters agree with the settings used on the computer or
other equipment connected to this port. A maximum of 32 relays can be daisy-chained
and connected to a DCS, PLC or a PC using the RS485 port.
Path:
Setpoints > Device > Communications > RS485
BAUD RATE
Range: 9600, 19200, 38400, 57600, 115200
Default: 115200
PARITY
Range: None, Odd, Even
Default: None
PORT PROTOCOL
Range: Modbus, DNP 3.0, IEC 60870-5-103
Default: Modbus
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