Fan Module - 3Com MSR 50-40 ROUTER. Installation Manual

You can connect a PSU to the backplane by inserting it from the rear of the router chassis. It is hot
swappable and its switchover does not affect the ongoing system operation.
When installing your router in a communications equipment room, ensure that the AC power distribution
cabinet can provide a lightning protection box or arrester against the current of 20 KA and above.
Appearance
Figure 1-11 AC-input PSU
Figure 1-12 DC-input PSU
LED
Table 1-13 PSU LED description
LED
ALM (red)
RUN (green)
AC/DC OK (green)

FAN Module

Functions
The MSR 50-40 is configured with six fans; the MSR 50-60 is configured with eight fans. These fans are
working in pairs and the two fans in each pair are working in redundancy. When all these fans are
working normally, the operating temperature of the system can be maintained between 0°C and 55°C
(32°F to 131°F). As the failure of a fan does not affect the operation of other fans, the normal operating
temperature of the system can maintain. The routing speed of the fans is adjusted by the fan controller
on the main control board and between 50% and 100% depending on the system temperature. When
the system temperature rises above the high-temperature threshold set by the fan controller, the fans
are rotating at full speed (100%); when the system temperature drops below the low-temperature
ON means the PSU is not well-seated or has failed.
Steady ON means the PSU is operating normally, and OFF means the
PSU has failed.
PSU input LED. Steady ON means the normal voltage is inputting, and
OFF means the opposite.
1-13
Meaning