8-20
Front-Panel Interface
Date Code 20020129
SEL-387E Instruction Manual
BREAKER 2 CLOSED
Circuit Breaker Open
The optoisolated input IN1 is de-energized when the 52a circuit breaker auxiliary contact is
open, resulting in:
DP2 = IN102 = logical 0
This results in the display of corresponding text setting DP2_0 on the front-panel display:
BREAKER 2 OPEN
Display Only One Message Example
To display just one screen, but not its complement, set only one of the text settings. For
example, to display just the “breaker closed” condition, but not the “breaker open” condition,
make the following settings:
DP2 = IN102
(52a circuit breaker auxiliary contact connected to
input IN102)
DP2_1 = BREAKER 2 CLOSED
(displays when DP2 = logical 1)
DP2_0 =
(blank)
Circuit Breaker Closed
The optoisolated input IN102 is energized when the 52a circuit breaker auxiliary contact is
closed, resulting in:
DP2 = IN102 = logical 1
This results in the display of corresponding text setting DP2_1 on the front-panel display:
BREAKER 2 CLOSED
Circuit Breaker Open
The optoisolated input IN102 is de-energized when the 52a circuit breaker auxiliary contact is
open, resulting in:
DP2 = IN102 = logical 0
Corresponding text setting DP2_0 is not set (it is “blank”), so no message is displayed on the
front-panel display.
Содержание SEL-387E
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