Specifications

vicorpower.com Applications Engineering: 800 927.9474 Page 2
Mechanical Considerations
The MicroPAC power supply can be mounted on four of the six surfaces using standard 6-32 screws
with a maximum torque of 7 inch-lb. When using the mounting points the maximum insertion depth
of the screw into the chassis from the outside surface must not exceed 0.125”.
When considering a mounting location and/or orientation it is important not to restrict the air flow
entering and exiting the MicroPAC. Air is drawn into the MicroPAC through the fan guard located next
to the input power connector at the rear of the power supply and exhausts through the load side of the
power supply next to the LED display panel. Westcor recommends a minimum clearance of 2” be kept
at the front and rear of the MicroPAC.
Care should be taken to minimize the output cabling as not impede the air exhausting from the
MicroPAC, the output screw securing the cabling to the output terminals should be torque to 15 inc-lb
not to exceed 20 inc-lb.
MicroPAC Do’s and Don’ts
> Do not operate the without a secure protective earth (PE) lead
connected to the input power connector.
> Do not operate the MicroPAC with AC input without inserting a correctly rated Vac fuse.
> Do not operate the MicroPAC with DC input without inserting a correctly rated Vdc fuse.
> Do not obstruct the fan air intake or air exhaust. (Care should be taken when connecting cabling).
> Do not connect or disconnect the output +Out or –Out cabling while the MicroPAC is in operation.
> Always make sure the output screws are properly torqued [15 inch-lb] before applying power.
> Run the output +Out and –Out cabling together preferably in a twisted pair configuration
from the MicroPAC to the load.
> Do not attempt to repair or modify the MicroPAC power supply.
> Use correctly rated wire size for both input and output to avoid overheating
and excessive voltage drop.
Acronym Term
AML
Approved
Manufacturing List
VAC Volts Alternating
Current
VDC Volts Direct Current
BCM Bus Converter
Module
PE Protective Earth
LED Light Emitting Diode
Acronym Term
EMI Electro-Magnetic
Interference
FPA Factorized Power
Architecture
FRU Field Replaceable Unit
GSD General shutdown
MTBF Mean Time
Between Failure
NTC Negative Temperature
Coefficient
Acronym Term
PFC Power Factor
Correction
PCB Printed Circuit Board
PS Power Supply
PSM Power Shed Mode
PC Performance Criteria
RoHS Restriction
of Hazardous
Substances
The following terms and acronyms are used throughout this document.
Terms and Acronyms