Network Engine LED designations
Table 8: Network Engine LED designations, normal status, and descriptions
LED Designation Normal Status Descriptions/Other Conditions
POWER (Green) On Steady On Steady = Unit is getting power from
either the battery or 24 VAC power.
Off Steady = Unit is shut down.
ETHERNET (Green) Flicker Flicker = Data is transferring on the
Ethernet connection. Ethernet traffic
is general traffic (may not be for the
network engine).
Off Steady = No Ethernet traffic, probably
indicates a dead Ethernet network or bad
Ethernet connection.
10/LINK (Green) On Steady On Steady = Ethernet connection is
established at 10 Mbps.
100/LINK (Green) On Steady On Steady = Ethernet connection is
established at 100 Mbps.
FC BUS (Green) Flicker Flicker = Normal communications; the FC
Bus is transmitting and receiving data.
Flickers are generally in sync with data
transmission but should not be used to
indicate specific transmission times.
Off Steady = No field controllers are
defined to FC Bus in the network engine.
PEER COM (Green) Varies (see next column) Flicker = Data traffic between network
engines. For a network engine that is
not a Site Director, this LED indicates
regular heartbeat communications with
the Site Director. For a Site Director NAE,
flashes are more frequent and indicate
heartbeat communications from all other
network engines on the site. For a single
network engine on a network without an
ADS, there is no flicker.
RUN (Green) On Steady On Steady = Network engine software is
running.
On 1 second, Off 1 second = Network
engine software is in startup mode.
On 0.5 seconds, Off 0.5 seconds =
NAE35/45 software is shutting down.
Off Steady = Operating system is
shutting down or software is not
running.
21NAE35/NAE45 Installation Guide
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