VICOR Mini MegaPAC User manual

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 1
Mini MegaPACTM
AC-DC Switcher
USER GUIDE | UG:110
November 2013
Overview
The Mini MegaPAC AC-DC switcher allows users to instantly configure high eciency,
o-line power supplies that operate on either 115 or 230 Vac (47-500 Hz),
or 260-380 Vdc. Although small in size, (3.4"H x 6.0"W x 9.5”L), (85,8 x 153,4 x 241,3 mm),
the Mini MegaPAC provides up to 1,000 W of output power. The chassis has five slots
and can provide up to ten isolated outputs.
A complete power supply is configured at the factory by selecting and inserting up
to five same length slide-in output assemblies called ConverterPACs. ConverterPACs
incorporate one or two VI-200/VI-J00 and/or Maxi Vicor DC-DC converters and are
available in a wide array of output voltages and power levels. The net result is a power
supply that oers the advantages of a custom supply, but is assembled from standard
and modular building blocks. For detailed information about the ConverterPACs, refer
to the ConverterPAC data sheets. The ConverterPACs used in the Mini MegaPAC use VE-
2xx and VE-Jxx modules. In addition, there is a four output model called a FlexPAC that
uses discrete circuits to support low power needs.
Manufactured at Vicor, the entire family of MegaPAC power supplies is completely
user-configurable. If output requirements change, i.e., more power or a dierent output
voltage is needed, upgrading is easy: simply unlock a single screw and replace the slide-
in ConverterPAC assembly with one of the same length and has the desired voltage
power rating. For additional flexibility, ConverterPACs can be connected in parallel to
increase output power (booster ConverterPACs), or in series for higher voltages (total
output voltage should not exceed 400 V). The driver is to the le of the boosters when
looking at the output end of the supply. A user-friendly interface provides control and
output sequencing capability, in addition to useful status indicators. Please consult our
Applications Engineering Department if you have other special requirements. Using
the VSPOC configurator tool available on vicorpower.com, anybody can now
configure a Mini MegaPAC (and other Vicor power supplies) online.
Contents Page
Overview 1
of Product
Mechanical 2
Considerations
MegaPAC 3
Do’s and Don’ts
Technical Description 3
Configuring and 5
Reconfiguring
MegaPACs
ConverterPAC 6
Description
Part Numbering 8
ConverterPAC Output 9
and Connector Pin
Identification
Quick Install 10
Instructions
Mechanical Drawings 13
Interface Connections 14
Specifications 20
Output Studs 21
Connector Kit Contents 21
Current Share Boards 22
Low Leakage Version 25

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 2
Standard Features
nInput voltage: 90-132 or 180-264 Vac, 47-500 Hz, or 260-380 Vdc
nOutput power: 1,000 W @ 115 Vac or 230 Vac
nOutputs: 5 slots (up to 10 outputs)
nFull power output to 45°C; half power to 65°C
nFan cooled
nConducted EMI meets EN55022 Class A and B
nAC Power OK status signal
nRoHS compliant available
nOutput Sequencing and General Shutdown (Consult Applications Engineering
for automatic sequencing circuitry)
nAutosense (Refer to Page 10 and Page 14 for more information on Autosense)
nOvercurrent protection standard on all outputs
nOutput overvoltage protection on all ConverterPAC outputs with VI-200 module
nOutput overtemperature limiting on all ConverterPAC outputs with VI-200 module
nSize: 3.4"H x 6.0"W x 9.5”L (85,8 x 153,4 x 241,3 mm)
nSafety Agency Approvals: CE Mark, cTÜVus
Optional Features
nDC OK status signal
nReversed fan airflow direction
nExtended temperature range DC-DC converters
nCurrent share boards - see Pages 22-24
nLow leakage version - see Page 25
Mechanical Considerations
The Mini MegaPAC can be mounted on any of four surfaces using standard 8-32 or
4 mm screws. The chassis comes with four mounting points on each surface; maximum
allowable torque is 20 lb-in. The maximum penetration is 0.15 in (3,8 mm).
When selecting a mounting location and orientation, the unit should be positioned so
air flow is not restricted. Maintain a 2" (5,1 cm) minimum clearance at both ends of the
Mini MegaPAC and route all cables so airflow is not obstructed. The standard unit draws
air in at the fan side and exhausts air out the load side. If airflow ducting is used, avoid
sharp turns that could create back pressure. The fan moves approximately 30 CFM of air.
Avoid excessive bending of output power cables aer they are connected to the
Mini MegaPAC. For high-current outputs, use cable-ties to support heavy cables and
minimize mechanical stress on output studs. Be careful not to short-out to neighboring
output studs. The Mini MegaPAC is supplied with serrated, flanged hex-nuts on all
output studs. Therefore, thread locking compounds or lock washers are not required.
The maximum torque recommended on flanged nuts is 45 lb-in. Never loosen the inner
nut on a ConverterPAC. This nut supports the hardware inside the ConverterPAC and is
factory torqued.
Avoid applications in which the unit is exposed to excessive shock or vibration levels. In
such applications, a shock absorption mounting design is required.

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 3
MegaPAC Do’s and Don’ts
nFor units without Autosense, do not leave ConverterPAC Sense lines open. Always
terminate them to their respective output locally or at the load. Use twisted pair 22-24
AWG wire. If ConverterPAC has Autosense, no local sense connection is required. See
Page 10 and Page 14 for more information on Autosense.
nIf needed, use Connector Kit # 19-130040 for the Mini MegaPAC.
nAlways fill all output slots of the MegaPAC. If a slot is not filled with a
ConverterPAC, it should be filled with an airblock. Airblocks are plastic assemblies
whose main function is to fill up an empty slot. Any airflow escape from an empty
slot significantly degrades thermal performance, and can result in overheating and
damage to the power supply.
nDo not unplug ConverterPACs while input power is applied. They are not
designed for hot-plug applications.
nDo not restrict airflow to the unit. The fan draws air into the unit and forces it out at
the output power terminals.
nSingle output ConverterPACs should NOT be paralleled directly together.
nFor power expansion, use booster ConverterPACs. Viewing the unit from the output
terminal side, always insert boosters to the right side of the driver. For booster arrays,
do not power up with bus bars removed.
nAlways ensure that output hex-nuts are properly torqued before applying
power to supply.
nDo not use boosters as independent outputs. Disconnecting bus bars will damage
booster ConverterPACs.
nRun the output (+/–) power cables next to each other to minimize inductance.
nWait 5 minutes aer shutting o power before inserting or removing ConverterPACs.
nThe MegaPACs do not have user-serviceable components. They must be returned to
the factory for repairs. Contact Customer Service for a RMA number before returning
the unit. Do not attempt to repair or modify the power supply in any manner other
than the exchange of ConverterPACs as described in this User Guide.
nInsert proper fault protection at power supply input terminals (i.e., a fuse).
nUse proper size wires to avoid overheating and excessive voltage drop.
nNever loosen the inner nut on a ConverterPAC. Verify output nuts are tight
before powering up.
nOutput voltages over 60 Vdc, whether from individual modules or series arrays, are
considered as hazardous secondary outputs under UL60950. Appropriate care must
be taken in design implementation of the supply.
nOnly use the regular length ConverterPACs in the Mini MegaPAC. One cannot use any
of the Extended Length ConverterPACS in the Mini MegaPAC. The ELs are only used
in the EL (Low Noise) products.
Technical Description
The Mini MegaPAC chassis consists of an o-line single phase AC front end, EMI filter,
cooling fan, customer interface and associated housekeeping circuits. Input AC mains
voltage (L1/N, L2 and GND) is applied to a terminal block. The input current is passed
through an EMI filter designed to meet EN55022 Class A and B. At start-up, inrush
current is limited by an NTC thermistor prior to being passed to the power rectifiers.
The power rectifiers and filter capacitors are arranged in a conventional full wave bridge

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 4
rectifier/voltage doubler configuration. This operates as a full wave bridge rectifier on
230 Vac, or can be manually strapped for operation as a voltage doubler on 115 Vac,
delivering unregulated 300 Vdc to a high voltage backplane. The backplane supplies
power to a variety of ConverterPAC assemblies that provide the desired low voltage,
regulated outputs.
Voltage conversion in the output assemblies is achieved by Vicor's family of
Zero-Current-Switching (ZCS) DC-DC converters. These are forward converters in which
the main switching element switches at zero current. This patented topology has a
number of unique attributes: low switching losses; high frequency operation resulting
in reduced size for magnetics and capacitors; excellent line and load regulation; wide
adjustment range for output; low EMI/RFI emission and high eciencies.
At initial power-up, the Mini MegaPAC outputs are disabled to limit the inrush current
and to allow the DC bus potential to settle out to the correct operating level. A low-
power flyback converter operating with PWM current-mode control converts the high
voltage DC bus into regulated low voltage to power the internal housekeeping circuits
and DC cooling fan. When operating on 115 Vac, the internal housekeeping Vcc comes
up within two seconds aer the application of input power. On 230 Vac, it comes up
within 500 ms. Once the bus potential is within operating parameters, the AC Power OK
signal asserts to a TTL "1" indicating that the input power is OK, and allows the power
outputs to come up within <50 ms later. An auxiliary Vcc output of 5 Vdc sourcing up to
0.3 A is provided for peripheral use on interface connector J10-9.
An output Enable/Disable function is provided by using an optocoupler to control the
Gate In pins of the ConverterPAC assemblies. If the Enable/Disable control pin is pulled
low, the optocoupler turns on, pulling the Gate In pin low and disabling the output.
The typical delay associated for an output to come up when measured from release of
the Enable/Disable pin is 5-10 ms. The General Shutdown function controls all outputs
simultaneously and works in a similar manner.
The ride-through (hold-up) time is the amount of time the load can be supported before
loss of output regulation aer the loss of input power. Detecting the loss of input power
takes a finite time period aer which the AC Power OK signal goes from a TTL “1” to “0.”
This signal is available for use within 1.2 seconds aer initial power-up and can be used
to indicate an impending loss of power. A minimum of 3 ms of warning time is given.
Following the loss of input power, the outputs are disabled when the bus voltage falls
below its operating threshold.
Figure 1.
Mini MegaPAC Architecture
EMI Filter AC/DC Power Rectification,
Input Voltage Strapping,
Inrush Current Limiting
Logic Power
Supply
Housekeeping
Circuits
DC
Fan
DC Bus Sense
Customer Interface
(Optoisolators)
High Voltage
Unregulated Bus
Power
Input
DC/DC Output
ConverterPAC #1
DC/DC Output
ConverterPAC #2
DC/DC Output
ConverterPAC #3
Power Output
Power Output
Power Output
DC/DC Output
ConverterPAC #5
Power Output
Control
DC/DC Output
ConverterPAC #4
Power Output

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 5
Configuring and Reconfiguring MegaPACs
Most ConverterPACs of the same length can be easily added, replaced, or moved by
sliding the assemblies in or out of a MegaPAC chassis. (Currently, the exceptions
are the FinPACs which can only be used in the PFC MegaPAC-High Power and the
UniPACs which can only be used in the 4 kW MegaPAC). They are driver ConverterPACs
and can be inserted into any available slot. For outputs greater than 200 Watts, a
driver ConverterPAC and one or more booster ConverterPACs will be used. Arrays of
drivers and boosters should be configured so all boosters are placed in the slots to the
immediate right of the driver when looking at the output end of the MegaPAC.
Prior to removing or installing ConverterPACs, you must remove power from the
MegaPAC and wait five minutes. Failure to do so can result in personal injury or
damage to the supply.
Take standard ESD precautions when handling ConverterPACs.
Removing ConverterPACs
ConverterPACs can be removed by loosening the captive screw at the base. Once
this screw has been loosened, the ConverterPAC will slide out of the chassis. Once a
ConverterPAC has been removed, the empty slot MUST be filled with either another
ConverterPAC or an airblock. If the slot is le empty, it will provide an airflow escape
and cause failure to the power supply.
Installing ConverterPACs as Drivers
ConverterPACs can be installed in empty slots by simply sliding in the new
ConverterPAC and securing the screw at the base. Power and interface connections can
be made aer the ConverterPAC has been installed.
Installing Booster ConverterPACs to Increase Output Power
ConverterPACs can be paralleled for more power. Additional power to an output is
obtained by connecting one or more Boosters in parallel with a single Driver. The
Driver can be placed in any open slot. All Boosters should be inserted in the slots to
the immediate right of the driver when viewed from the output end of the MegaPAC.
Figure 2 shows a driver placed in slots # 1 and 3 boosters placed in slots # 2 to 4. Aer
inserting the Driver and Boosters, they are paralleled using bus bars across the positive
and negative output studs. Drivers should not be paralleled with each other. Bus bars
between a Driver and Booster(s) should never be disconnected. (For help in identifying
Boosters and Drivers, refer to the Part Numbering section on Page 8). Please note that
total output voltage should not exceed the converter baseplate-output isolation rating of
400 V. For detailed guideline on how outputs should be placed in series, please refer to
the Applications Note (Creating High Voltage Outputs) available on the website
at www.vicorpower.com.
Figure 2.
Paralleling ConverterPACs
Driver
Bus Bars for Paralleling
Loosen screw to
remove ConverterPAC
Boosters
12345

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 6
ConverterPAC Functional Description
ConverterPACs are the family of slide-in output assemblies used in MegaPAC power
supplies. Most ConverterPACs of the same length are interchangeable within a MegaPAC
and between AC input MegaPAC chassis. They can be added, moved, or changed as
necessary. The following ConverterPACs are used in the Mini MegaPAC.
ModuPAC
The ModuPAC output assembly consists of a VI-200 DC-DC converter that converts the
high voltage bus to the desired regulated output voltage. Each ModuPAC can provide
up to 200 Watts of power. Multiple ModuPACs can be paralleled in a Driver-Booster
configuration to provide more power. ModuPACs are fused with a PC-Tron, DC-rated,
fast-acting fuse. A passive LC filter is used to reduce output ripple/noise down to 1%
typical, and 2% maximum peak-to-peak from 10% to 100% of rated load. An optional
DC Power Good signal, or output voltage Trim potentiometer can be specified. The
ModuPAC contains overvoltage protection (OVP), overcurrent protection (OCP) and
overtemperature limiting (OTL). The OCP has automatic recovery when the overcurrent
condition is removed. The OVP and OTL are latching functions and require recycling of
the AC input power to restart.
JuniorPAC
The JuniorPAC consists of a VI-J00 DC-DC converter that converts the high voltage
bus to the desired regulated output voltage. JuniorPACs can provide up to 100 Watts of
output power and are fused with a single PC-Tron, DC-rated, fast-acting fuse. A passive
LC filter is used to reduce output ripple/noise down to 1% typical, and 2% maximum
peak-to-peak from 10% to 100% of rated load. An optional DC Power Good signal or
output voltage Trim potentiometer can be specified. The JuniorPAC contains output
overcurrent protection, which recovers automatically when the overcurrent condition is
removed. Overvoltage protection and overtemperature limiting are not available.
DualPAC
This output assembly consists of two VI-J00 DC-DC converters that convert the high
voltage bus to the desired regulated output voltages as noted above. The outputs
are electrically isolated. Enabling and disabling the slot will control both outputs
simultaneously.
RamPAC
This output assembly consists of a VI-J00 DC-DC converter with a Ripple Attenuator
Module (RAM) and is designed for applications requiring low output ripple/noise.
The RamPAC can attenuate the ripple/noise down to 10 mV peak-to-peak or 0.15%
whichever is greater over a 20 MHz bandwidth from 10% to 100% of rated load of the
converter. RamPACs can only operate between 5–50 V and is limited to 100 W (20 A).
BatPAC
The BatPAC output assembly consists of a VI-200 BatMod current source that converts
the high voltage bus to the desired regulated output voltage. The converter is fused with
a PC-Tron, DC-rated, fast-acting fuse. The BatPAC is a 200 Watts programmable current
source that can be configured as a battery charger. Maximum current and voltage
settings are controlled using potentiometers that come as a standard feature, or through
Trim pin access as an option. BatPACs are available for 12 V, 24 V and 48 V battery
systems.
+
_
Remote Sense
VI-200
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
+
_
VI-J00
Remote Sense
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
Remote Sense
Output #2 Adjust
Output #2
Output #1
Remote Sense
Output #1 Adjust
VI-J00 VI-J00
M2 M1
M1
M2
+
_
VI-J00 RAM
Remote Sense
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
+ Vout
VI-200/BatMOD
- Vout
Remote Interface
Voltage Limit Adjust
Current Limit Adjust
+
_
ModuPAC
JuniorPAC
DualPAC
RamPAC
BatPAC

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 7
ConverterPAC Functional Description (Cont.)
FlexPAC
The FlexPAC output assembly consists of from two to four discrete outputs that
convert the high voltage bus to the desired output voltage. Each FlexPAC output can
be manually trimmed from 2 V to 25 V and supports up to 5 Amps with a maximum
output power of 50 W per output. All outputs maintain less than 50 mV noise over the
entire output range. All outputs support local sense only. For electrical trim options and
specific output sequencing contact the factory.
List of ConverterPACs used in the Autoranging MegaPAC and their features
ConverterPAC OVP OCP OTL RS/AS* LS/AS* PG TrimPot
ModuPAC Std Std Std AS* AS* Opt Opt
DualPAC N/A Std N/A AS* AS* N/A Opt
JuniorPAC N/A Std N/A AS* AS* Opt Opt
RamPAC N/A Std N/A AS* AS* Opt Opt
BatPAC N/A Std N/A N/A N/A N/A Opt
FlexPAC Std Std Std N/A LS N/A Std
* See Page 10 and 14 for more information on Autosense.
OVP Overvoltage Protection (latching) OCP Overcurrent Protection
OTL Overtemperature Limiting (latching) RS Remote Sense
PG Power Good (DC OK TTL Signal) LS Local Sense (replaced by Autosense)
AS Autosense
Note: All ConverterPACs mentioned above can be paralleled EXCEPT the DualPAC, JuniorPAC,
RamPAC and FlexPAC.
M-1 STATUS
M-1 VOLTAGE ADJUSTMENT
M-4 STATUS
M-3 STATUS
M-2 VOLTAGE ADJUSTMENT
M-2 STATUS
M-4 VOLTAGE ADJUSTMENT
M-3 VOLTAGE ADJUSTMENT
CONNECTOR J1
FlexPAC

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 8
Part Numbering
Mini MegaPAC MMxA-1xBxxxx
eg. MM4-143605
MM = Mini MegaPAC Prefix
xA= number of outputs
1= Mini MegaPAC Chassis
xB= number of modules + FlexPACs
xxxx = assigned by Vicor
ConverterPAC XxDV/xEAxF
eg. M15V/10A eg. M15V/10ADFI eg. D15V/6.7A-12V/8.3AT
X= ConverterPAC type (For RoHS, add G to current prefix)
M = ModuPAC D = DualPAC R = RamPAC J = JuniorPAC B = BatPAC
(RoHS = GM) (RoHS = GD) (RoHS = GR) (RoHS = GJ) (RoHS = GB)
xD= Voltage out
xE= Current out (rounded to 1 decimal point)
xF= Can be multiple options*(see below)
FlexPAC Fxxaaa-bbb-ccc-ddd
F= FlexPAC xx = pack chassis variations
aaa = voltage setting for output 1 with implicit factor of 10 (103 = 10.3 V)
bbb = output 2 ccc = output 3 ddd = output 4
* ConverterPAC options
BBooster module MMilitary Grade module
DDC OK or Power Good[1] PPreload
FFull 50-110% output adjustment[2] RRAM external[3]
F1 50-107.5% output adjustment STrimpot removed for external BatPAC adjustment
F2 50-105% output adjustment T90-110% output adjustment[4]
F3 50-102.5% output adjustment T1 90-107.5% output adjustment
F4 50-100% output adjustment T2 90-105% output adjustment
F5 60-110% output adjustment T3 90-102.5% output adjustment
F6 70-110% output adjustment T4 90-100% output adjustment
F7 80-110% output adjustment T5 98-105% output adjustment
F8 90-110% output adjustment T6 100-110% output adjustment
F9 100-110% output adjustment V1 "VXI" low noise (150 mV)15 V < VOUT < 24 V output5
IIndustrial Grade module V2 "VXI" low noise (50 mV) VOUT < 15 Vdc
KCustom SRF module used V3 "VXI" low noise (1% ripple) for outputs >24 V
[1] D option: Optional for all ConverterPACs EXCEPT the DualPAC, BatPAC, and FlexPAC
[2] F option: Optional for all ConverterPACs EXCEPT the BatPAC, DualPAC and FlexPAC.
Trim Range based on module type and voltage.
[3] R option: When using an external RAM, components such as Autosense resistors and Local Sense
jumpers must be removed before turning on the supply. In addition, in order to insure proper operation,
sense pins must be connected either locally or remotely after the RAM's output. For further information,
contact Applications Engineering.
[4] T option: Optional for all ConverterPACs EXCEPT the BatPAC, DualPAC and FlexPAC. Trim range
determined based on module type and voltage.
[5] V option: Optional ONLY on the ModuPAC, DualPAC and JuniorPAC. N/A on all other
ConverterPACs.

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 9
ConverterPAC Output and Connector Pin Identification for the Mini MegaPAC
ModuPAC
JuniorPAC
RAMPAC
J2-PIN1
J3-PIN1
0UTPUT ADJUST
+ V0UT
- VOUT
(REMOTE SENSE)
J2
2
1
3- SENSE
+ SENSE
MATING HDWR:
TRIM PIN ACCESS
3POWER GOOD
2
1SIGNAL GROUND
POWER GOOD INVERTED
MATING HDWR:
4
J3 DC OK (POWER GOOD)
Vcc IN
HOUSING- MOLEX P/N: 50-57-9403
TERMINALS- MOLEX P/N: 16-02-0103
CRIMP TOOL MOLEX P/N: 11-01-0118
HOUSING- MOLEX P/N: 39-01-0043
TERMINALS- MOLEX P/N: 30-00-0031
CRIMP TOOL MOLEX P/N: 57005-5000
MODUPAC
DualPAC
J2-B-PIN1
OUTPUT ADJUST
J2-A-PIN1
J2
(REMOTE SENSE) MATING HDWR:
HOUSING- MOLEX P/N: 50-57-9403
TERMINALS- MOLEX P/N: 16-02-0103
CRIMP TOOL MOLEX P/N: 11-01-0118
3- SENSE
+ SENSE
1TRIM PIN ACCESS
2
OUTPUT ADJUST
J1-B-PIN1
J1-A-PIN1
(OUTPUT CONNECTORS)
1 AND 4 +V OUT
33 +R/SENSE 6 -R/SENSE
1
2
J1
TERMINALS- MOLEX P/N: 39-00-0039
HOUSING- MOLEX P/N: 39-01-2060
CRIMP TOOL MOLEX P/N: 11-01-0197
MATING HDWR:
6
5
4
2 AND 5 -V OUT
DUALPAC
VOLTAGE LIMIT ADJUST
J2 (BATPAC REMOTE INTERFACE)
CURRENT MONITOR
CURRENT LIMIT ADJUST
- VOUT
VOLTAGE LIMIT ADJUST
1
- VOUT
3
2
4
J2-PIN1
CURRENT LIMIT ADJUST
CRIMP TOOL MOLEX P/N: 57005-5000
TERMINALS- MOLEX P/N: 30-00-0031
HOUSING- MOLEX P/N: 39-01-0043
MATING HDWR:
BATPAC
+ V0UT
BatPAC
M-1 STATUS
M-1 VOLTAGE ADJUSTMENT
M-4 STATUS
M-3 STATUS
M-2 VOLTAGE ADJUSTMENT
M-2 STATUS
M-4 VOLTAGE ADJUSTMENT
M-3 VOLTAGE ADJUSTMENT
CONNECTOR J1
FlexPAC
MATING HDWR:
HOUSING MOLEX P/N 39-01-2120
TERMINALS MOLEX P/N 39-00-0039
CRIMP TOOL MOLEX P/N 11-01-0197
Note: New output studs have been installed on the ConverterPACs and are 1/8 inch longer.
Refer to Page 21 for more information.

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 10
Mini MegaPAC “Quick Install” Instructions (For Mechanical Drawing, see Page 13)
Mounting the Mini MegaPAC
nThe Mini MegaPAC can be mounted on any of four sides.
nUse #8-32 or 4 mm mounting screws. Maximum penetration should
not exceed 0.15” (3,8 mm).
nMaintain 2” (5,1 cm) clearance at either end for airflow.
nMaximum allowable torque is 20 lb-in.
Input Connections
Input Power J9
nInput AC power is applied to terminal block J9 using a pressure screw terminal.
nMaximum torque is 10 lb-in.
nWhen operating from 230 Vac, verify the strapping wire (provided) has been removed
from J9-4 and J9-5. Operation from 230 Vac with the strapping wire installed will
damage the power supply.
nWhen operating from 115 Vac, verify the strapping wire (provided) has been installed
between J9-4 and J9-5.
nA fuse or circuit breaker is reequired in the input line for safety reasons.
nUse a maximum wire size of 10 AWG with soldered terminals.
Output Connections
Power Connections
Installing ring lugs and/or bus bars on output studs:
nThe upper stud is Positive and the lower stud is the Return.
nRemove outer nut. Do not remove or loosen inner nut.
nPlace ring lug over output stud.
nReplace and tighten outer nut to a maximum torque of 45 lb-in.
Do Not Over-Tighten Nuts.
nVerify all output nuts are properly installed before turning on supply.
Installing power connectors on DualPACs (J1A and J1B):
nUse Molex mating receptacle #39-01-2060 with #39-00-0039 terminals provided.
nPins 1 and 4 are Positive, while pins 2 and 5 are the Return.
nAttach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0197.
Sense Connections
Note: Newer power supplies have a new feature called Autosense. If Remote Sense connections are
not made or needed, no Local Sense selection is necessary - simply hook up the output 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 outputs can cause failure to the unit.
115V OPERATIO
N
JUMPER FOR
J9-5 120 VAC
J9-4 120 VAC
J9-3 AC NEUTRAL
J9-2 AC HOT
J9-1 EARTH GROUND
J9 INPUT CONNECTIONS
L2S2 L1/N
HERE.
EARTH
JUMPER
230 VAC
AS IS
-OR-
115 VAC
WITH S1-S2
DO NOT
RUN W/O
GROUND
S1
J2-PIN1
J3-PIN1
0UTPUT ADJUS
T
+ V0UT
- VOUT
MODUPAC
6 -REMOTE SENSE
3 +REMOTE SENSE
2 & 5 -V OUT
1 & 4 +V OUT
PIN J1B
+
46
-
5
+
+RS
-
-RS
321
J1A
321
46
+RS
-RS
+
+
-
5
-
Input Panel Connectors
Single Output ModuPAC
DualPAC Output Connector