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Home ⊙ NEWS ⊙ ABB Relion® Protection and Control REX640 Pilot wire protection communication link
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ABB Relion® Protection and Control REX640 Pilot wire protection communication link

From:ABB | author:Mr.Chen | Time :2025-08-11 | 5 view: | Share:

HSR applies the PRP principle of parallel operation to a single

ring. For each message sent, the node sends two frames, one

through each port. Both frames circulate in opposite directions

over the ring. Every node forwards the frames it receives from

one port to another to reach the next node. When the

originating sender node receives the frame it sent, the sender

node discards the frame to avoid loops. The HSR ring supports

the connection of up to 30 relays. If more than 30 relays are to

be connected, it is recommended to split the network into

several rings to guarantee the performance for real-time

applications.

The relay can be connected to Ethernet-based communication

systems in a station bus using the RJ-45 connector (100Base

TX) or the multimode fiber optic LC connector (100Base-FX). A

dedicated protection communication port uses a pluggable

multimode or single-mode fiber optic LC connector (100Base

FX). If connection to a serial bus is required, the RS-485 or

fiber-optic serial communication ports can be used.

Modbus implementation supports RTU, ASCII and TCP modes.

Besides standard Modbus functionality, the relay supports

retrieval of time-stamped events, changing the active setting

group and uploading of the latest fault records. If a Modbus

TCP connection is used, five clients can be connected to the

relay simultaneously. Further, Modbus serial and Modbus TCP

can be used in parallel, and, if required, both IEC 61850 and

Modbus can be run simultaneously.

The IEC 60870-5-103 implementation supports two parallel

serial bus connections to two different masters. Besides basic

standard functionality, the relay supports changing of the active

setting group and uploading of disturbance recordings in IEC

60870-5-103 format. Further, IEC 60870-5-103 can be used at

the same time with the IEC 61850 protocol.

DNP3 supports both serial and TCP modes for the connection

of up to five masters. Changing the active setting and reading

fault records are supported. DNP serial and DNP TCP can be

used in parallel. If required, both IEC 61850 and DNP can be run

simultaneously.

The relay supports Profibus DPV1 with support of SPA-ZC 302

Profibus adapter. If Profibus is required, the relay must be

ordered with Modbus serial options. Modbus implementation

includes SPA protocol emulation functionality. This functionality

enables connection to SPA-ZC 302.

When the relay uses the RS-485 bus for the serial

communication, both two- and four-wire connections are

supported. Termination and pull-up/down resistors can be

configured with DIP switch on the communication card so that

external resistors are not needed.

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