Dual Power Supply; Cooling System - BridgeTech VB20 User Manual

4.2.1 Dual Power Supply

The Enhanced Chassis (EC) is delivered with two 100-240V AC / 75W power supplies,
providing power redundancy. Each EC unit consists of a 1RU chassis with 3 option
slots. In normal operation load is shared between the two power supplies. If mains fall-
out occurs for one of the power sources or one of the power supplies fails, the power
supply still in operation will take the full load, seamlessly. This means that monitoring
operation will not be affected if one of the power sources fails. Power supply failure will
be indicated by a red LED located rightmost on the front of the chassis.
Figure 5: Red LED indicating failure for one of the power supplies

4.2.2 Cooling System

The chassis is equipped with six long-life fans that suck in air from front of the chassis.
The air exits at the back of the unit. The fans are temperature controlled, allowing
them to run at an optimum speed. Venting holes at the sides of the chassis provide an
optional air intake, ensuring good aerodynamical properties of the cooling air flow. It
is recommended, but not essential, that these venting holes are not covered.
PROBE USERS' MANUAL VERSION 5.0
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