How To Switch Between Front And Rear Connection - ABB REM 610 Operator's Manual

REM 610
3.1.10.
16
Motor Protection Relay
Operator's Manual
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Fig. 3.1.9.-1 Setting the real-time clock

How to switch between front and rear connection

There are two means of serial communication available for the relay: the front
connection for SPA bus communication and the optional rear communication
module for communication via the SPA bus, IEC 60870-5-103 or MODBUS (RTU
or ASCII) protocol.
If the relay is not provided with an optional rear communication module, or if the
module has been disabled, the front connection is always active and switching
between front and rear connection is not allowed.
If the optional rear communication module has been installed and enabled, the
default setting is rear connection. Switch between front and rear connection as
follows:
1. Press an arrow button to access the main menu.
2. Use the arrow buttons to select CONFIGURATION\COMMUNICATION and
press . The cursor will be at the setting currently in use (REAR
CONNECTION or FRONT CONNECTION).
3. Press to enter the setting mode. The second line will start to flash.
4. Use or to select the desired setting.
5. Press to confirm the selection.
6. Press to return the display to the idle mode.
When the front connection has been selected and there is no communication for
approximately five minutes, the rear connection will automatically be activated. To
keep the front connection continuously active, press
connecting the auxiliary voltage to the relay.
Note!
When rear connection has been selected, the selected rear protocol will
automatically be activated.
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1MRS 752264-MUM
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and simultaneously when