System Humidity; System Voltages; Internal Operating Temperature - Cabletron Systems Environmental Module TM 9C300-1 User Manual

9C300-1 Environmental Module Operation

System Humidity

The 9C300-1 Environmental Module monitors the non-condensing humidity level
of the MMAC-Plus. The results of the monitoring are available to the network
manager via LCD, as well as local and remote management. The humidity levels
are displayed as shown in Table 3-2.

System Voltages

The 9C300-1 Environmental Module monitors specific system power parameters
to ensure that they are within acceptable limits. The power parameters monitored
from the backplane are the 48 volt DC System Power Bus and the INB
Termination Power Bus. The power parameter monitored within the
Environmental Module is the 12 volt internal line. The results of the monitoring
are available to the network manager via LCD, as well as local and remote
management. Voltages above or below the acceptable voltage limits cause an
alarm to be sent to the network manager. Table 3-3 summarizes these acceptable
voltage limits.
48 volt DC System Power Bus
INB Termination Power Bus
12 volt internal line

Internal Operating Temperature

The 9C300-1 Environmental Module monitors its own internal operating
temperature by comparing its current temperature to the ambient temperature
and programmed rise temperatures to determine current temperature status. If
the temperature of the Environmental Module exceeds normal operating limits,
an alarm is sent to the network manager. In addition, if the ambient temperature
sensor fails, pre-established temperature ranges have been programmed to ensure
proper internal temperature monitoring.
3-4
Table 3-2. System Humidity
Humidity
0–45%
46–94%
95% and above
Table 3-3. Acceptable Voltage Limits
Description
LCD Display
STATIC RISK
NORM (normal)
MOIST
Acceptable Voltage Limits
From 40 volts to 59 volts
From 3.1 volts to 5 volts
From 11 volts to 13 volts