Vicor Westcor PFC MegaPAC Power Factor Corrected AC-DC Switchers - Manual (Page 12)

UG:105 vicorpower.com Applications Engineering: 800 927.9474 Page 12
PFC MegaPAC “Quick Install” Instructions
(For Mechanical Drawing, see page 15)
Mounting the PFC MegaPAC and PFC MegaPAC-High Power
n Mount the power supply on any of its four sides.
n Use #8-32 or 4mm mounting screws. Do not exceed a maximum penetration of 0.15"
(3,8mm). The maximum allowable torque is 5.5 lb-in.
n Maintain 2" (5,1cm) clearance at either end for airflow.
Input Connections
Input Power J9
n Apply input AC power to terminal block J9 using a pressure screw terminal.
n Strip length of AC power conductors to be 0.35 inches.
n Maximum torque is 4.4 lb-in.
n Place a fuse or circuit breaker in the input line for safety reasons.
n Use a maximum wire size of 14 AWG with soldered terminals.
n The connector manufacturer recommends the wires not be tinned. A ferrule (Phoenix
P/N 32-00-58-0, purchased from other sources) can be used to prevent fraying.
Output Connections
Power Connections
Installing ring lugs and/or bus bars on output studs:
n The upper stud is Positive and the lower stud is the Return.
n Newer outputs studs are 1/8th inch longer. See page 24 for more information.
n Remove nut.
n Place ring lug over output stud.
n Replace and tighten outer nut to a maximum torque of 45 lb-in.
Do Not Over-Tighten Nuts.
n Verify all output nuts are properly installed before turning on supply.
Installing power connectors on DualPACs (J1A and J1B):
n Use Molex mating receptacle #39-01-2060 with #39-00-0039 terminals provided.
n Pins 1 and 4 are Positive, while pins 2 and 5 are the Return.
n Attach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0197.
Sense Connections
Note: Newer power supplies have the Autosense feature. For these units, if Remote
Sense connections are not made or needed, no Local Sense selection is necessary -
simply connect the output to the load and the unit will automatically operate in Local
Sense. If Remote Sense connections are made, the unit will operate in a Remote Sense
mode. Remote Sense terminals should be terminated to their respective output i.e. - RS
to - Output and + RS to + Output. See page 13 for more information on Autosense.
For units without Autosense, sense connections must ALWAYS be made. Not
connecting sense lines to their respective output can cause failure to the unit.
INPUTS DO NOT
WITHOUT
EARTH
GROUND
L2
115/230 VAC
300VDC
47 TO 500 Hz
OPERATE
NOTE: SET SCREW MAXIMUM
TORQUE = 4.4 INCH POUNDS
LABEL NO: 94-00046 REV B
L1
J2 Pin 1
J3 pin 1 (DC OK Option)
+ Vout
- Vout
MODUPAC/JR.PAC/RAMPAC
Vtrim Pot Adjust (Option)
J1B
+
4 6
-
5
+ +RS -
-RS
3 2 1
J1A
3 2 1
4 6
+RS
-RS +
+
-
5
-
Input Panel Connectors
Single Output ModuPAC
DualPAC Output Connector