PowerHub
TM
User Manual, Version 1.2
13
The current draw and fault current limit for each output is displayed with 100mA resolution.
The fault current limit can be used as a software configurable fuse to ensure that if a particular
output draws higher current than expected, the output is disabled. This prevents one
malfunctioning device from overloading the PowerHub and causing all outputs to be current
limited.
The PowerHub output and input voltages are measured internally and displayed with 10mV
resolution. These voltages are displayed as a reference, confirming the current state of the
module.
The internal temperature of the PowerHub corresponds to the exhaust air temperature and is
provided with 1
o
C resolution. If the internal temperature of the PowerHub is too high, the
module will shutdown. To resume operation the input power must be cycled using the Master
power switch on the front panel or by the remote enable connection.
Finally, the fan status is displayed as
OK
if the fans are operating as expected and
ERR
if one or
both of the cooling fans have stalled. The fan status is only a warning to the user and the
outputs will remain active until the module overheats. If a fan error is detected, the maximum
operational temperature of the PowerHub will be reduced until the error is cleared.
