Installation manual

TurboStack Series Hubs
21
LED Displays
TurboStack hubs have two types of LED displays:
❑ Hub status indicators show the overall condition of the module.
❑ Port indicators show the condition of each port connection. They
vary with module type; later chapters of this manual give specifics.
Note
When you power-up a Slave module, its port activity LEDs continuously
illuminate in sequence until either management software is downloaded
from a Master or a device is connected to one of the ports on the Slave’s
front panel.
Hub Status
Indicators
The hub status LEDs shown in Figure 13 appear on both the front and the
back panels of every TurboStack hub.
The specific illumination characteristics of each hub status LED are as
follows:
FAULT—(OFF under normal operational conditions): The Fault indicator
stays red for a very short time at power-up; remains continually red if a
malfunction occurs during the diagnostics.
ACTIVITY—The Activity indicator will flash when Ethernet packets are
being transmitted to all hub ports.
POWER—Green whenever power is applied.
Port Activity
Indicators
The front panel location of the port indicators varies with the specific hub
model type, as explained in the later chapters of this manual.
Figure 13: Hub LEDs
AT-TS24TRS
hub status LEDs
AT-TS24TRS
port activity
LEDs (1 above
each port)