Technical data

• Temperature sensor triggered
• An over current condition
• An over voltage condition
• Loss of ac input
• Fan failure
• Input voltage greater than 132 Vrms or less than 88 Vrms (if in 120
Vrms mode) or input voltage greater than 264 Vrms or less than 176
Vrms (if in 240 Vrms mode)
1.14 Fan Tray
The BA430/BA440 enclosure has two 15-cm (6-in) dc fans (Figure 1–16)
and Figure 1–17 below the card cage. The air is pulled in through the
top slots of the enclosure and forced through the ISEs, power supply, and
module options, and then expelled through the vents at the bottom of the
enclosure. A temperature sensor in the power supply adjusts the volume
of air by varying the fan’s speed based on the system’s temperature. The
input voltage to the fans varies between 10 Vdc and 20 Vdc, depending on
the internal temperature of the power supply.
1–22 BA430/BA440 Enclosure Maintenance