13.4.3 EIA-232 serial rear connection
The EIA-232 connection follows the TIA/EIA-232 standard and is intended to be used
with a point-to-point connection. The connection supports hardware flow control
( RTS, CTS, DTR, DSR), full-duplex and half-duplex communication.
13.4.4 EIA-485 serial rear connection
The EIA-485 communication module follows the TIA/EIA-485 standard and is
intended to be used in a daisy-chain bus wiring scheme with 2-wire half-duplex or
4-wire full-duplex, multi-point communication.
The maximum number of devices (nodes) connected to the bus where
the protection relay is used is 32, and the maximum length of the bus is
1200 meters.
13.4.5 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.
Using ST loop mode requires an ST serial converter that supports
detecting and removing of duplicate request after transmission trough
full circle.
13.4.6 Communication interfaces and protocols
The communication protocols supported depend on the optional rear
communication module.
Table 733: Supported station communication interfaces and protocols
Interfaces /
Protocols
Ethernet Serial
100BASE-TX
RJ-45
100BASE-FX LC EIA-232/EIA-485 Fibre-optic ST
IEC 61850 ● ● - -
MODBUS RTU/
ASCII
- - ● ●
MODBUS TCP/IP ● ● - -
DNP3 (serial) - - ● ●
DNP3 TCP/IP ● ● - -
IEC 60870-5-101 - - ● ●
Table continues on the next page
Protection relay's physical connections 1MRS758755 C
838 REC615 & RER615
Technical Manual
To Next Page
Loading...
