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J2 Customer Interface Signals (Cont.)
Standby Mode
Pin 7
This pin is normally at +5 V potential when referenced to Pin 2 . If this
pin is shorted to Pin 2 the MicroPAC will enter a low power standby
mode. In this mode all outputs will be disabled, the main PFC power
supply will be shut-down along with the fan. The blue power LED will
change to an amber color. When the short is removed the power supply
will return to normal operation and the power LED will turn to blue.
General Shut Down (GSD)
Pin 8
This pin is normally at +5V potential when referenced to Pin 2 . If this
pin is shorted to Pin 2 all the channels will be disabled and all four of
the GSD LED’s (1-4) will illuminate.
Fan Fault (Latching)
Pin 9
This pin is normally at +5V potential when referenced to pin 2.
In the event of the fan failing the detection circuit will shut the
MicroPAC down, and illuminate the fault LED red. Pin 9 ; will go from
logic high to logic low level during this event. The MicroPAC will be
latched in this condition until power is removed for 30 seconds, upon
reapplying power if the fault is still persist the power supply will latch
in the shut-down mode until the fault has been cleared.
Ed/2 Enable / Disable Output Channel Two
Pin 10
This pin is normally at +5V potential, this enables output channel two.
To disable channel two this pin should be shorted to Pin 2 . If the output
is disabled LED 2 will illuminate on the LED display until the output
is enabled
Not Connected
Pin 11
Pin 11 is not u sed
Ed/4 Enable/Disable Output Channel Four
Pin 12
This pin is normally at +5 V potential, this enables output channel four.
To disable channel four this pin should be shorted to Pin 2 . If the output
is disabled LED 4 will illuminate on the LED display until the output
is enabled.
vicorpower.com
Applications Engineering: 800 927.9474
Page 14
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