ABB Relion REM601 - Page 45

1MDU07212-YN Rev. D Section 4
Protection and Control Function
REF601 / REJ601 / REM601 39
Application Manual
By default all binary outputs are NO (Normally Open).
(Exception: BO1 in CEI configuration is NC (Normally Close)
During non-availability of power, binary output configured as
Inverted will open and its status will be restored only after
availability of power.
All binary outputs except BO4 can be triggered by different protection and control
signals. It is possible to map same signal to trigger more than one binary output.
The signals available for triggering binary outputs are as follows:
 Individual start of protection functions I>, I>>, I>>>, Io> and Io>>
 Individual trip of protection functions I>, I>>, I>>>, Io> and Io>>
 External trip (open) command available at binary input (configured for
Breaker command operation) as well command available from MODBUS /
IEC_103 or Front HMI
 External close command available at binary input (configured for Breaker
command operation) as well command available from MODBUS / IEC_103 or
Front HMI
 External user defined Signal 1 to Signal 3 available at binary input (configured
via binary input menu)
Apart from above signals, the UNIT READY status is fixed configured at BO4 and
cannot be changed. No other signals can be configured at BO4.
Table 24: Trip and signaling contacts
Binary output
Default configuration
BO1
Default as Trip1 contact for O/C and E/F. Under relay healthy condition, this
contact will remain open. In the event of trip/breaker open command, it will
close.
BO2
Default as Trip2 contact for breaker open output. In the event of fault (O/C
and E/F) / breaker open command, it will close
BO3
Default as contact for Breaker close command. This contact will close, when
breaker close command is received either from relay HMI or through
communication.
BO4
Non-configurable signaling contact for Unit ready / internal relay fault
indication. Under relay healthy condition this will be in close condition. During
internal fault this will open
BO5
Default as signaling contact over current trip. In the event of phase faults (I>,
I>> and I >>>) it will close and remain latched
BO6
Default as signaling contact earth fault trip. In the event of earth faults (Io>
and Io>> it will close and remain latched