ABB RELION REX640 Technical Manual page 115

1MRS759142 C
REX640
Technical Manual
"Follow-S": Follow Signal, ON
In this mode ALARM follows the input signal value, Non-latched.
Activating
signal
LED
GUID-FC749ABD-369E-46DC-AF45-9C4D386C7B4C V1 EN
Figure 32: Operating sequence "Follow-S"
"Follow-F": Follow Signal, Flashing
Similar to "Follow-S", but instead the LED is flashing when the input is active, Non-
latched.
"Latched-S": Latched, ON
This mode is a latched function. At the activation of the input signal, the alarm shows
a steady light. After acknowledgement by the local operator pressing any key on the
keypad, the alarm disappears.
Activating
signal
LED
Acknow.
GUID-2D81A712-CB4B-4ED1-B7C4-B37DED341686 V1 EN
Figure 33: Operating sequence "Latched-S"
"LatchedAck-F-S": Latched, Flashing-ON
This mode is a latched function. At the activation of the input signal, the alarm starts
flashing. After acknowledgement, the alarm disappears if the signal is not present and
gives a steady light if the signal is present.
Section 3
Basic functions
109