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J2 Customer Interface Signals
Note: All customer interface signals are referenced to the auxiliary +5 V return (Pin 2)
Auxiliary Supply
Pin 1
Pin 2
An auxiliary +5 V supply output is available with a maximum
output of 500 mA (2.5 W).
0 V; this is the return for the above +5 V.
ED/1 Enable/Disable Output Channel One
Pin 3
ED/1: This pin is normally at +5 V potential, this enables
output channel one. To disable output one this pin should
be shorted to Pin 2 . If the output is disabled LED 1 will illuminate
on the LED display until the output is enabled.
Overtemperature Warning (Non Latching)
Pin 4
This pin is normally held at +5 V potential when referenced to
Pin 2 . When running at 100% load at approximately 50°C ambient
temperature the overtemperature warning signal will be pulled low,
the fault LED indicator will illuminate solid yellow. This is just a
warning that you are approximately +5°C away from the maximum
operating temperature of the MicroPAC at full load.
Overtemperature Shutdown (Latching)
Pin 4
The same pin is used as the overtemperature warning.
At approximately +56°C if running at 100% load the overtemperature
shutdown is triggered. The fault LED previously illuminated a solid
yellow due to the overtemperature warning will now begin to flash
at approximately 2 Hz. All outputs of the MicroPAC will be
automatically disabled. The power supply will go into a shutdown
mode; however the fan will be left running to cool the unit, the
MicroPAC will remain in shutdown mode until the temperature reaches
an acceptable level and the power is recycled.
ED/3 Enable/Disable Output Channel Three
Pin 5
ED/3: This pin is normally at +5 V potential, this enables output
channel three. To disable channel three this pin should be shorted
to Pin 2 . If the output is disabled LED 3 will illuminate on the LED
display until the output is enabled.
Power
Pin 6
If the AC or DC power input is present the pin is normally at +5 V
potential when referenced to Pin 2 . The blue power LED will illuminate.
If the AC or DC input is lost Pin 6 will fall to logic level zero and the
blue power LED will turn off. This will allow a minimum 10 mS power
loss warning to the customer.
vicorpower.com
Applications Engineering: 800 927.9474
Page 13
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