Indication And Control Connections - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
9.1.4.2.
Protection Relay
Technical Reference Manual, Standard Configurations

Indication and control connections

The output signals can be routed to any of the output relays and in this example the
circuit breaker close-signal is connected to the power output 3, PO3 (X4.1.17/18).
The status indications from the circuit breaker can also be connected to any of the
digital inputs DI1...DI9. In this example DI1 (X4.2.5/6), has been used for open
indication and DI2 (X4.2.6/7), for close indication, mainly because these two inputs
have a common ground.
The close signal is connected to the output relay PO3. In
Main menu\Configuration\Output Signals\, scroll down to the PO3
output and select the close signal.
The status-indication signals are also routed from the digital inputs to the circuit
breaker function (I<->O CB1) via the input signal selectors. These settings can be
found in: Main menu\Configuration\Input Signals\, where the
different input signal names are displayed and the specific inputs selected. The
status-indication signals are named as "CB pos. open" and "CB pos. close".
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To change the settings for "CB pos. open" and "CB pos. close" go to the
Configuration\Input Signals\ and scroll with the [
push button to "CB pos. open" and press the [E]-button. The different digital inputs
are displayed one at a time by selecting with the [
Select DI1 and press the [E]-button to confirm. Scroll to the "CB pos. close" and
select the DI2 input.
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To change the settings for the "CB pos. open" and go to the "Configuration" and
"Input Signals" and find "CB pos. open". Select DI1 in the pull-down menu.
REX 521
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