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3. Operation and Configuration
EAFR-101S Arc Point Sensor Relay User Manual
MN026005EN February 2016 www.eaton.com
3. Operation and Configuration
3.1 LED Indicator Functions
TThe EAFR-101S contains 17 indication LEDs. A user defin-
able text pocket can be slid in under the label for identify-
ing each LED function (except POWER and ERROR LEDs).
LEDs are located at the front plate of the relay for clear
viewing without a need for opening doors.
During power up, the relay performs a LED test. All LEDs
are turned on for two seconds and then off. Only the blue
POWER LED will remain on. After powered up, the relay
goes into protection mode in 50 ms even while the LED
test is being performed.
During normal operation, only the blue power LED is ON.
The sensor LEDs are off during the inactive condition. If
a point arc sensor is activated, the corresponding sensor
channel LED will turn on if the activation is longer than 1.5
ms. The sensor LED activation function is latched (steady
light). To clear the LED, the “SET” button should be
pressed.
In case of a loose sensor wire and binary input wires or
configuration mismatch (new sensor attached without run-
ning auto-configuration system setup [see Section 3.3.1)
situation, the corresponding LED for that sensor will start
flashing and the ERROR LED will activate.
The Binary I/O LEDs are indicating the I/O-line status. If any
of the lines become active for more than 1.5 ms, the corre-
sponding LED will turn on (latch).
In a trip situation, the corresponding trip LED will turn on.
Trip outputs are controlled by the dipswitch settings (see
Section 3.5).
All activation and trip indication LEDs are latched, even if the
dipswitch setting is in the non-latched mode. They have to
be cleared by pushing the “SET” button.
LED indications are stored in non-volatile EPROM memory
for identifying the trip information in case the auxiliary
power is lost. When re-powering the relay after power sup-
ply loss, the actual LED status can be visualized from the
front of the relay.
