Det-Tronics Eagle Quantum Premier - Communication Units; Eq22 Xxdcu and Eq22 Xxdcuex Digital; Eq24 Xxne Network Extender

4-16
95-8533
18.2
EQ22XXDCU AND
EQ22XXDCUEX DIGITAL
COMMUNICATION UNITS
The DCUs have three LEDs to provide a visual
indication of device status. They are visible
through the window on the enclosure cover.
NOTE
If the communication module has not
been congured, the red LED blinks at a
4 Hz rate.
NOTE
The amber LED is provided for factory
diagnostic purposes and is not used in
the system. Illumination of the amber
LED normally indicates a failure in the
communication chip. Replacement of
the communication module circuit board
is required.
EQ24XXNE NETWORK
EXTENDER
The EQ24xxNE has three LEDs (one green, two
amber) for indicating device status.
Table 4-18—DCU Status Indicators
LED Device Status
Green When On indicates device has power.
Flashes to indicate messages are
being transferred over the LON.
Amber When On indicates a malfunction
in the electronic circuitry. Module
replacement is required.
NOTE
When a network extender has
an internal fault, the message
display will only indicate that
there is a LON fault condition
existing somewhere on the LON.
Device
Status
LED Status
Power-up Pulsed at a rate of 0.5 Hz
Calibration Pulsed at a rate of 1 HZ or on
steady
Fault Pulsed at a rate of 4 Hz
Alarm On steady
Table 4-21—Network Extender Status Indicators