Vicor DC MegaPAC DC-DC Switcher - Manual (Page 2)

Pg. 2 Vicor 800-735-6200 Mission Power Solutions (760) 631-6846 (phone) or (760) 631-6972 (fax) Rev. 3/04
DC MegaPAC Operator’s Manual
DC MegaPAC™
DC-DC Switcher
DC MegaPAC “Quick Install” Instructions
Mounting the DC MegaPAC
* The DC MegaPAC can be mounted on any of four sides.
* Use #8-32 or M4 mounting screws. Maximum penetration should not exceed 0.15" (3,8mm).
* Maintain 2" (5,1cm) clearance at either end for airflow.
Output Connections
Power Connections
Installing ring lugs and/or bus bars on output studs:
* The upper stud is Positive and the lower stud is the Return.
* Remove outer nut. Do not remove or loosen inner nut.
* Place ring lug over output stud.
* Replace and tighten outer nut to a maximum torque of 45 lb-in.
Do Not Over-Tighten Nuts.
Installing power connectors on DualPACs (J1A and J1B):
* Use Molex mating receptacle #39-01-2060 with #39-00-0039 terminals
provided.
* Pins 1 and 4 are Positive, while pins 2 and 5 are the Return.
* Attach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0197.
Sense Connections
Sense connections must always be made. Failure to connect Sense lines can
cause failure to the unit.
Sense Connector J2:
* Sense connections do not have to be made if the Local Sense option has been
ordered. (An “L” in the ConverterPAC part number means the Local Sense
option has been installed; e.g. M5V/40AL.)
* Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals pro-
vided.
* J2-2 is the +Sense and J2-3 is the -Sense.
* Attach terminals to 22-24 AWG twisted pair wire using Molex tool #11-01-
0208.
* Attach opposite ends of Sense lines to point where regulation is desired.
* Verify that Sense lines are not cross-connected before applying input
power.
Sense Connections on DualPACs:
* Sense connections do not have to be made if the Local Sense option has been
ordered. (An “L” in the ConverterPAC part number means the Local Sense
option has been installed; e.g. D5V/20AL-12V/4.2AL.)
* Sense connections are available on the J2 connector or the J1A and J1B con-
nectors. Either can be used.
* If using J2 connector, see instructions above for “Sense Connector J2.”
* Pin 3 is the +Sense and Pin 6 is the -Sense.
* Attach terminals to 18-24 AWG twisted pair wire using Molex tool #11-01-
0197.
* Verify that Sense lines are not cross-connected before applying input
power.
1&4 +Vout
2&5 -Vout
3 +Sense
6 -Sense
DualPAC Output Connector
Pin
J1A & J1B
1
2
3 4
5
6
1
2
3
Sense Connector
1 Trim Pin Access
2 +Sense
3 -Sense
Pin
J2
1&4 +Vout
2&5 -Vout
3 +Sense
6 -Sense
DualPAC Output Connector
Pin
J1A & J1B
1
2
3 4
5
6