Setup guide

INSTALLATION REQUIREMENTS AND SPECIFICATIONS
Page 2-10
Power Fail When lit, this red LED indicates a loss of input
(Power Supply) power, loss of regulation on any output, or the
activation of any power fail circuit protection.
Fault When lit, this red LED indicates that an over
(Power Supply) current (short circuit) condition has occurred;
this condition could result from inadequate
power to the hub (only one power supply
installed where two are required), or from a
problem in the chassis itself. Once the over
current condition has been corrected, the power
supply requires power cycling (turn the power
switch off for at least ten seconds, then on
again) to recover.
Redundancy A green LED indicates that two E-series power
(E-series only) supplies are installed in a chassis with the
correct backplane (chassis revisions EL and
above) and that redundancy is available
(neither power supply operating at more than
50% output); a red LED indicates that two
E-series power supplies are installed in a
chassis with the correct backplane and the
redundancy is not available (each power
supply operating at greater than 50% output).
If neither LED is lit, an M8PSM-E has been
installed in the same chassis as an M8PSM, or
the chassis has an older backplane and must be
upgraded to fully use the E-series features.
On the M8PSM-E and -EDC, the above-described
Power OK and Power Fail LEDs are simply labeled
“Power.” When the green LED is illuminated, the pow
er
supply is operating correctly, as described in Power
OK, above; the red LED indicates the same trouble
conditions described in Power Fail, above.
NOTE