Specifications

vicorpower.com Applications Engineering: 800 927.9474 Page 11
J2 Customer Interface Signals
All customer interface signals are referenced
to the auxiliary +5V return (pin 2)
1.1.11 Auxiliary Supply
Pin 1 An auxiliary +5V supply output is available
with a maximum output of 500 mA (2.5 W).
Pin 2 0 V; this is the return for the above +5V.
1.1.12 ED/1 Enable/Disable Output Channel One
Pin 3 ED/1: This pin is normally at +5V 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.
1.1.13 Over Temperature Warning (Non Latching)
Pin 4 This pin is normally at +5V potential when referenced to pin 2. At approximately
50°C ambient temperature the over temperature 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.
No other action by the power supply will be taken.
1.1.14 Over Temperature Shutdown (Latching)
Pin 4 The same pin is used as the over temperature warning.
At approximately +56°C the over temperature shutdown is triggered, the fault LED
previously illuminated a solid yellow due to the over temperature warning will now
begin to flash at approximately 2 Hz. All outputs will be disabled. The power supply will
go into a shutdown mode; however the fan will be le running to cool the unit, the
MicroPAC will remain in shutdown mode until the temperature reaches an acceptable
level and the power is recycled.
1.1.15 ED/3 Enable/Disable Output Channel Three
Pin 5 ED/3: This pin is normally at +5V 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.
1.1.16 Power
Pin 6 If the AC or DC power input is present the pin is normally at +5V 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 o. This will allow a
minimum 10 mS power loss warning to the customer.
1.1.17 Standby Mode
Pin 7 This pin is normally at +5V 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
power supply will return to normal operation and the power LED will turn to blue.
1.1.18 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.