Defining Serial Port Settings; Setting Communication Protocol Parameters; Rs-485 Bias And Termination Settings; Connecting And Setting The Local Hmi - ABB RELION REX640 Operation Manual

Section 7
Commissioning
7.4.2.8
7.4.2.9
7.4.2.10
7.4.3
7.4.3.1
110
• IP address
• Subnet mask
• Default gateway of the optional rear port Ethernet connector

Defining serial port settings

1. Select Configuration/Communication/COM1 or COM2.
2. Define the settings for the serial port.
It is possible to change the general serial communication parameters per port.
Select fiber or galvanic mode with the proper baud rate.

Setting communication protocol parameters

1. Select Configuration/Communication/<protocol>.
2. Change the protocol specific settings.
Possible settings to be changed are, for example, the selected communication
port, address and link mode.

RS-485 bias and termination settings

A 6 x DIP switch is located on the bottom side of the COM1004...COM1005 boards.
RS-485 biasing and termination settings are possible through this switch. If the switch
is in "OFF" position, bias and termination are disabled and in "ON" position, they are
enabled.
Table 21: Bias and termination DIP switch
Switch Signal
1 RS485_A1/+
2 RS485_A1/+
RS485_B1/-
3 RS485_B1/-
4 RS485_A2/+
5 RS485_A2/+
RS485_B2/-
6 RS485_B2/-

Connecting and setting the local HMI

Connecting local HMI directly to relay

• Use a CAT 6 S/FTP cable to connect the LHMI to the protection relay.
• Connect the cable to the X1.1/Main unit connector on the LHMI and to the X0/
HMI connector on the protection relay's communication module.
X8 pin Type
8 Bias
Bus termination
7 Bias
10 Bias
Bus termination
9 Bias
1MRS759118 A
REX640
Operation Manual