Vicor PFC MegaPAC-HPEL Power Factor Corrected AC-DC Switchers - Manual (Page 11)

UG:119 vicorpower.com Applications Engineering: 800 927.9474 Page 11
PFC MegaPAC-EL and -HPEL “Quick Install” Instructions
(For Mechanical Drawing, see Page 14)
Mounting the PFC MegaPAC-EL and PFC MegaPAC-HPEL
n Mount the power supply on any of its four sides.
n Use #8-32 or 4 mm mounting screws. Do not exceed a maximum penetration of
0.15" (3,8 mm). The maximum allowable torque is 20 lb-in.
n Maintain 2" (5,1 cm) 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 Pages 14 and 23 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 DualQPACs - J1A (M2) and J1B (M1):
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
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 12 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. WARNING:
NEVER disconnect the +Out and -Out load wires while the supply is operating as
disconnecting WILL cause damage to the power supply.
INPUTS DO NOT
WITHOUT
EARTH
GROUND
L2
115/230 VAC
300VDC
INPUT CONNECTIONS
J9-1 EARTH GROUND
J9-2 L2-NEUTRAL
J9-3 L1
L1
47 TO 500 Hz
OPERATE
NOTE: SET SCREW MAXIMUM
TORQUE = 4.4 INCH POUNDS
LABEL NO: 94-00046 REV B
QPAC (L)
J2-PIN1
OUTPUT ADJUST
- VOUT
+ V0UT
J1B (M1)
+
4 6
-
5
+ +RS -
-RS
3 2 1
J1A (M2)
3 2 1
4 6
+RS
-RS +
+
-
5
-
Input Panel Connectors
Single Output QPAC
DualQPAC Output Connector