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

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 11
Mini MegaPAC “Quick Install” Instructions (Cont.)
Sense Connector J2:
nSense connections do not have to be made if the Local Sense option has been ordered.
nUse Molex mating receptacle #50-57-9403 with #16-02-0103 terminals provided.
nJ2-2 is the +Sense and J2-3 is the -Sense.
nAttach terminals to 22-24 AWG twisted pair wire using Molex tool #11-01-0118.
nAttach opposite ends of Sense lines to point where regulation is desired.
nVerify that Sense lines are not cross-connected before applying input power.
Sense Connections on DualPACs:
nSense connections do not have to be made if the Local Sense option has been ordered.
nSense connections are available on the J2 connector or the J1A and J1B connectors.
Either can be used.
nIf using J2 connector, see more information on Page 9.
nFor J1A and J1B, Pin 3 is the +Sense and Pin 6 is the -Sense.
nUse Molex mating receptacle #39-01-2060 with #39-00-0039 terminals provided.
nAttach terminals to 18-24 AWG twisted pair wire using Molex tool #11-01-0197.
nVerify that Sense lines are not cross-connected before applying input power.
Trim Pin Connection J2
nThe Trim J2 connection should only be made if the Trim option has not been
installed. (A “T” or “F” in the ConverterPAC part number means the
Trim option is installed; e.g. M5V/40AT.)
nUse Molex mating receptacle #50-57-9403 with #16-02-0103 terminals provided.
nAttach terminals to 22-24 AWG stranded wire using Molex tool #11-01-0118.
nJ2-1 provides Trim access.
DC OK (Power Good) Connection J3
nDC OK is available as an option and is only present when requested.
nJ3-4 is Vcc In , J3-3 is Power Good, J3-2 is Power Good inverted
and J3-1 is Signal Ground.
nUse Molex mating receptacle #39-01-0043 with #39-00-0031 terminals provided.
nAttach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.
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
-
DualPAC Output Connector
Sense Connector
1
2
3
Sense Connector
J2-1 Trim Pin Access
J2-2 +Sense
J2-3 -Sense
Pin
J2
1
2
3
Sense Connector
J2-1 Trim Pin Access
J2-2 +Sense
J2-3 -Sense
Pin
J2
4
3
2
1
J3
J3-4 Vcc
J3-3 Power Good
J3-2 Power Good Inverted
J3-1 Signal Ground
Pin
DC OK (Power Good)
Trim Pin Connector
DC OK (Power Good)

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 12
Mini MegaPAC “Quick Install” Instructions (Cont.)
Interface Connections J10
nUse Molex mating receptacle #39-01-2120 with #39-00-0039 terminals provided.
nJ10-1 to 8 are Enable/Disable for slots 1-8.
nJ10-9 is Vcc, J10-10 is Signal Ground, J10-11 is AC Power OK
and J10-12 is General Shutdown.
nAttach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0122.
is General Shutdown.
nAttach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0197.
FlexPAC Connections J1
nUse Molex mating receptacle #39-01-2120 with #39-00-0039 terminals provided.
nAttach terminals to 18-24 AWG stranded wire using Molex tool #11-01-0197.
nJ1 pins 11, 5, 12 and 6 are for special trim options. Contact factory for use.
nLocal Sense only.
NC
NC
NC
E/D-5
E/D-4
E/D-3
E/D-2
E/D-1
J10-8
J10-7
J10-6
J10-5
J10-4
J10-3
J10-2
J10-1
J10 INTERFACE PIN OUT
GEN SHUTDOWN
AC POWER OK
SIGNAL GROUND
Vcc +5V, 0.3A
J10-12
J10-11
J10-10
J10-9
123456
78910 11 12
1 +V OUT M1
7 -V OUT M1
2 +V OUT M2
8 -V OUT M2
3 +V OUT M3
9 -V OUT M3
4 +V OUT M4
10 -V OUT M4
5 DO NOT USE
11 DO NOT USE
6 DO NOT USE
12 DO NOT USE
NC
NC
NC
E/D-5
E/D-4
E/D-3
E/D-2
E/D-1
J10-8
J10-7
J10-6
J10-5
J10-4
J10-3
J10-2
J10-1
J10 INTERFACE PIN OUT
GEN SHUTDOWN
AC POWER OK
SIGNAL GROUND
Vcc +5V, 0.3A
J10-12
J10-11
J10-10
J10-9
123456
78910 11 12

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 13
PFC MegaPAC Mechanical Drawing
JUMPER
WITH S1-S2
HERE.
S2S1
230 VAC
AS IS
-OR-
115 VAC
L1/N L2
EARTH
DO NOT
RUN W/O
GROUND
ORIGINAL RE-DESIGNED
OUTPUT PANEL AND STUDS
NOTE: EITHER THE ORIGINAL OR RE-DESIGNED OUTPUT STUD AND PANEL COMBINATION
MAY BE PRESENT. THE NEW OUTPUT PANEL HAS A BRASS INSERT AND THE STUD IS 1/8 INCH LONGER.
FLANGED BRASS NUT INSERT
MAX SCREW PENETRATION - .15
AND 18-24 AWG STRANDED WIRE. HOUSING WITH #39-00-0039 TERMINALS MATING RECEPTACLE IS MOLEX #39-01-2060 ARE MOLEX #39-30-1060 MINI-FIT JR. HDRS. J1A & J1B REMOTE SENSE/OUTPUT CONNECTORS
6
+RS -RS
3
DUAL MODUPAC OUTPUT CONNECTIONS
321
USE MOLEX TOLL #11-01-0122.
SENSE
6 -REMOTE
SENSE
(SCALE: NONE)
NOTES: UNLESS OTHERWISE SPECIFIED
6
J1A
+RS -RS
1
3 +REMOTE 2 & 5 -V OUT 1 & 4 +V OUT
45
+-
+
-
PIN
INPUT LEGEND
21
AIR FLOW STANDARD
45
-+ - + J1B
115V OPERATION JUMPER FOR
J9-1 EARTH GROUND
THRU J9-5) FOR #10 AWG INPUT WIRES .20 SQ. (5.2 MM) OPENINGS (J9-1
INPUT CONNECTIONS
J9-5 120 VAC J9-4 120 VAC J9-3 AC NEUTRAL J9-2 AC HOT
J9
MAXIMUM TORQUE 10 IN-LBS CLAMPING SCREWS FOR INPUT LEADS, .040 X .13 SLOT
WITH TERMINAL #39-00-0039 AND 18-24 MATING RECEPTACLE MOLEX #39-01-2120. #39-30-1120. CUSTOMER I/O INTERFACE
#11-01-0122.
AWG STRANDED WIRE. USE MOLEX TOO
L
J10
MOLEX HEADER MINI-FIT JR. 12 POS
IDENTIFICATION CONNECTOR
J
10 INTERFACE
HDWR:
7
1
12
89
23
10 11
456
Vcc +5V, 0.3A GEN SHUTDOWN AC POWER OK SIGNAL GROUND
J10-12 J10-11 J10-1O
J10-11 J10-1O J10-12
MegaPAC
WESTCOR
mini
M4/#8-32 THDS 16 PLACES
GEN SHUTDOWN AC POWER OK SIGNAL GROUND
J10 (ACOK) INTERFACE PIN OUT
(10-040921-38 ASSEMBLY ONLY)
J10 (STD) INTERFACE PIN OUT
E/D-2J10-2
J10-8 J10-7 J10-6
J10-9
J10-5 J10-4 J10-3
NC NC NC E/D-5 E/D-4 E/D-3
J10-1 E/D-1
J10-6 J10-7
J10-9
J10-8 J10-4 J10-3 J10-5 J10-2 J10-1
E/D-2
Vcc +5V, 0.3A
/AC POWER OK NC NC E/D-4 E/D-3 E/D-5 E/D-1
TOOL #57005-5000. AND 22-28 AWG STRANDED WIRE. USE MOLEX #39-01-0043 USING #39-00-0031 TERMINALS MOLEX #39-27-0042 TO MATE WITH HSG
"POWER GOOD" CONNECTOR WHEN "POWER GOOD"
MODUPAC REMOVAL
MODUPACS, 5 PLACES TO SECURE/REMOVE #4-40 CAPTIVE SCREWS
APPROXIMATELY LABEL LOCATED AS SHOWN
PARALLEL OUTPUTS BUS BARS - FOR
OPTION IS SPECIFIED. HDWR:
J3
(MODULES MUST BE ADJACENT) SERIES OUTPUTS BUS BAR - FOR
SIGNAL GROUND
POWER GOOD INV.
POWER GOOD
2
J3
1
Vcc
4
3
PIN
TYP. -P1
HDWR: "REMOTE SENSE" & "TRIM PIN ACCESS" CONNECTOR
SERRATED FLANGED NUTS 1/4 - 20 ZINC PLATED STEEL,
AS SHOWN (TYP) (MODUPAC MODEL NO.) APPROXIMATELY LABEL LOCATED
45 IN-LBS ±5
(DUAL MOD)
J1B-PIN1
AIR BLOCK
(NO "POWER GOOD"
TYP. +P1
(EXAMPLE)
OPTION AVAILABLE) DUAL MODUPAC
1
R12
WHEN ADJUSTABLE OUTPUT
- REMOTE SENSE
+ REMOTE SENSE
TRIM PIN
J2-PIN1
TYP.
OPTION IS SPECIFIED. R4 "TRIMPOT" PRESENT
3
J2
+P5
2
PIN 1
J2
J1A-PIN1
(DUAL MOD)
J3-PIN1
(SAME AS J2)
R4
C
L
USE MOLEX TOOL #11-01-0118. TERMINALS AND 22-24 AWG STRANDED WIRE. #50-57-9403 HSG, USING #16-02-0103 MOLEX #705-53-0002 TO MATE WITH
(SAME AS J2)
J2B-PIN1 J2A-PIN1
-P5 TYP.
C
L
(238.8 MM)
J9-1
(26.9 MM)
.50 (12.7 MM)
1.06
(5.6 MM)
.220
(74.2 MM)
2.920
FAN
.45 (11.4 MM)
(231.3 MM)
9.10
9.40
(121.8 MM)
4.800
3.38 (85.8 MM)
(89.4 MM)
3.52
(30.2 MM)
(153.4 MM)
6.04
1.19
1.80
J9-5
(129.5 MM)
5.10
.60 (15.2 MM)
8.78 (223.0 MM)
(45.7 MM)
(69.6 MM)
(15.7 MM)
.62
(35.6 MM)
2.74
1.40
.729 (18.52)
(18.5 MM)
2.91 (73.9 MM)
4=SP. @ .7285
1.93 (49.0 MM)
V
COR
I

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 14
Interface Connections
Chassis Input Power Terminals (J9)
Input AC power is applied to terminal block J9 using a pressure screw terminal that
accepts a maximum wire size of 10 AWG. The maximum torque recommended is
10 lb-in. J9-1 (GND) is Earth Ground for safety; J9-2 (L2) is the Hot connection; J9-3
(L1/N) is the other Hot or input Neutral connection. Mini MegaPACs are normally
shipped for operation from a 230 Vac source. To operate from a 115 Vac source, a
strapping wire should be connected from S1(J9-5) to S2 (J9-4). Strapping wires are
included with every shipment. When operating from a 300 Vdc source, remove strap.
A fault clearing device, such as a fuse or circuit breaker at the power supply input, is
required per safety agency conditions of acceptability. It should be sized to handle the
start-up inrush current.
Output Power Connections (+P, -P for Single Output, or J1A/J1B for Dual Outputs)
For single output ConverterPACs, these terminals are two 1/4-20 plated steel studs. The
upper stud is positive with respect to the lower stud. For dual output ConverterPACs,
there is a 6-pin Molex connector for each output. J1A pins 1 and 4 are the +Output,
and J1A pins 2 and 5 are the -Output. Pins 3 and 6 are duplicates of the Remote Sense
terminals present on J2A and J2B. Use appropriate wire size rated to handle the full
output current, including short circuit levels. Avoid large current loops in output cables;
run power and return cables next to one another to minimize inductive eects. All
outputs are isolated and can provide positive or negative outputs.
Output +/-Sense Connections - J2 for Single Output, or J1A/J1B for Dual Outputs
Newer power supplies have outputs configured with the Autosense feature that
automatically locally senses the output if remote sense is not used. To check if an
output has the Autosense feature, measure the impedance from the +Out to +Sense
and -Out to -Sense pins. If the impedance is 5 Ohms, then the output has Autosense and
does not require local sense jumpers.
If units do not have Autosense, sense connections must be made. When making sense
connections, keep in mind that although all outputs are open -Sense protected, the
+/-Sense terminals MUST be connected to their respective outputs before the MegaPAC
is powered up. Regardless of the output polarity configured, the +Sense should always
connect to the +Power output. The -Sense connects to the -Power output.
Sense connections are not required on Booster ConverterPACs and BatPACs. Sense pins
can be accessed on J1A/J1B on dual output units.
Figure 3.
Input Panel Connectors
115V OPERATION
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

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 15
Interface Connections (Cont.)
Signal Ground (J10-10)
Signal Ground (see Figure 4 and Connector Pin Identification on Page 9) is an isolated
ground reference for all J10 interfacing signals, and can be used for ConverterPAC
output status signals such as Power Good. This is not the same as Earth Ground on input
power connector J9.
Enable/Disable (J10-1 to J10-5)
The Enable/Disable control pins allow ConverterPAC outputs to be sequenced either
on or o. J10-1 through J10-5 are the control pins for output positions 1 through 5,
respectively (see Figure 5 and Connector Pin Identification above). For DualPACs,
both outputs are sequenced. In parallel arrays, only the driver ConverterPAC need be
controlled. The Enable/Disable pins should be pulled low to less than 0.7 V with respect
to Signal Ground to disable the outputs. They will sink 10 mA maximum. These pins
should be open circuited or allowed to exceed 4.5 V when enabled. Do not apply more
than 6 V to these inputs at any time.
General Shutdown/GSD (J10-12)
The GSD control pin on J10-12 allows simultaneous shutdown of all ConverterPAC
outputs (see Connector Pin Identification on Page 12). This pin must be pulled down
to less than 0.7 V, and will sink 10 mA maximum to shut down all outputs. The GSD
pin should be open circuited or allowed to exceed 4.5 V when not in use, or when the
outputs are to be enabled. Do not apply more than 6 V to this input at any time. Normal
open circuit voltage is 1.5 to 3 V with respect to Signal Ground.
Figure 4.
Interface Connector (J10)
NC
NC
NC
E/D-5
E/D-4
E/D-3
E/D-2
E/D-1
J10-8
J10-7
J10-6
J10-5
J10-4
J10-3
J10-2
J10-1
J10 INTERFACE PIN OUT
GEN SHUTDOWN
AC POWER OK
SIGNAL GROUND
Vcc +5V, 0.3A
J10-12
J10-11
J10-10
J10-9
123456
78910 11 12
Mini MegaPAC
1
10
12
Signal Ground
General Shutdown
Enable/Disable Output 1
J10
1
0
TTL "1" (OFF)
TTL "0" (ON)
A TTL "1" applied to the base of the transistor turns
output OFF. Pin 1 (or Pin 12 for GSD) is pulled Low
with respect to Signal Ground. 9Vcc
Enable/Disable Control
Figure 5.
Enable/Disable and
General Shutdown

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 16
Interface Connections (Cont.)
AC OK / Power Fail (J10-11)
This is an active high TTL compatible signal and provides a status indication of the AC
input power (see Figure 6 and Connector Pin Identification on Page 12). It is capable of
sinking 20 mA maximum. This signal switches to a TTL “1” when the high voltage bus
exceeds low-line condition during turn-on, and switches to a TTL “0” 3 ms (minimum)
before loss of output regulation due to the loss of input AC power. This signal can be
used to warn external control circuits of an impending loss of power.
Auxiliary Vcc +5V/0.3A (J10-9)
The Vcc on J10-9 is an auxiliary 5 V regulated power source (see Figure 7 and Connector
Pin Identification on Page 15). It is +5 Vdc +/–5% with respect to Signal Ground and can
supply 300 mA maximum. It is short-circuit-proof, but if shorted all outputs will shut
down through the Enable/Disable circuitry. The Auxiliary Vcc typically powers user
circuitry or is used with the Power Good circuitry to provide a pull-up reference for the
outputs of the DC Power Good circuit on a ConverterPAC. If used for this purpose, the
Signal Ground on J10-10 must also be connected to the J3-1 Signal Ground pin of the
ConverterPAC.
10K
Signal Ground
AC Power OK
11
+5V
10
J10
2.49K
PN2222
Figure 6.
AC OK / Power Fail
78M05 Auxiliary Vcc
9
0.1 µF
Signal Ground
J10
10
+5V/300 mA
Figure 7.
Auxiliary Vcc

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 17
Interface Connections (Cont.)
Power Good (J3-2)
The optional Power Good signal on J3-3 is referenced to Signal Ground on J3-1, and
indicates the status of the output voltage. This signal is asserted a TTL “1” when the
output voltage is above 95% of nominal. It is a TTL “0” when the output voltage is below
85% of nominal.
If the Trim option is also used, the Power Good trip points DO NOT track with the
trimmed voltage. It is possible to trim the output below the fixed setpoints of the Power
Good circuit and cause a negative Power Good signal.
Power Good Inverted (J3-3)
This is the inverse of the Power Good signal and is referenced to Signal Ground on J3-1.
Signal Ground (J3-1)
Signal Ground on J3-1 is an isolated secondary ground reference for J3 status signals
(see Figure 8). It is used to provide a reference point for the Power Good circuitry and is
not the same as Earth Ground on input power connector J9.
Vcc In (J3-4)
The Vcc In on J3-4 is an input that requires +5 V either from the J10 Auxiliary Vcc, or
from another source. Input current to this pin is limited by an internal resistor to
3 mA. If the J10 Auxiliary Vcc is connected to Vcc In on J3-3, then at least one J10 Signal
Ground must be connected to Signal Ground on J3-1.
+Sense/–Sense (J2-2 and J2-3) (See Page 10 and 13 for more information on Autosense)
The +Sense on J2-2 should be connected to the +Power Out, and the –Sense on J2-3 to
the –Power Out terminal. Do not reverse or leave the Sense pins open. Sense pins can
be terminated locally at the output of the power supply, in which case the power supply
will provide regulation at the output terminals. The voltage appearing at the load may
drop slightly due to voltage drop in the power cables. If it is necessary to compensate
for voltage drop along the output power cables, this termination should be made close
to the output load. Compensation of up to 0.5 V (0.25 V per lead) can be obtained. Use
twisted pair 22-24 AWG wire for this purpose.
For DualPACs, the +Sense pins are available on connectors designated as J2A-2 and
J2B-2 for outputs A and B, respectively. –Sense pins are on J2A-3 and J2B-3, respectively.
These pins are also duplicated on the power connectors J1A and J1B.
Reminder: Only units with Autosense will automatically operate in Local Sense mode
if no sense connections are made. It will operate in remote sense mode if Remote Sense
connections are made. Units without Autosense MUST have sense connections (Local
or Remote) terminated to their respective output for the unit to operate properly.
Signal Ground
2
Vcc In
4
J3
20K
10K
2N2222
10K
1
Power Good
3
Power Good
Figure 8.
Power Good and Vcc

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 18
Interface Connections (Cont.)
External Trim (J2-1)
Output voltage can be trimmed using an optional factory-installed Trim potentiometer or
with the Trim pin (see Figure 10). The Trim potentiometer is located on the ConverterPAC.
If the Trim potentiometer has not been ordered, the Trim pin must be used. When using the
Trim pin, the Trim limits are determined by the DC-DC converter used on the ConverterPAC.
Maximum Trim ranges are 10% above the nominal converter voltage and 50% below the
nominal converter voltage (except 10 V, 12 V, 13.8 V and 15 V outputs which are 10% below
nominal) as measured from the output studs or output connector of the power supply.
Note: The combined effects of module trim up, remote sense and dynamic load step may cause the module
to trip OVP. (See page 19 for information on restart).
The Trim pin on J2 can be used to control the output voltage. It is referenced to the -Sense
pin on J2 and can be controlled by either a resistor network or an external voltage source.
To increase an output voltage above its nominal, it is necessary to increase the voltage at
the Trim pin above the internal reference voltage (Vref). The reverse is true to decrease an
output voltage.
Note: Converters are sometimes pretrimmed at the factory if a nonstandard output voltage is requested.
Standard voltages include 2 V, 3.3 V, 5 V, 10 V, 12 V, 15 V, 24 V, 28 V, and 48 V. If using a nonstandard
voltage, or if a ConverterPAC is ordered with a Trim option, the resistor calculations will differ from those on
Page 19. Please consult the factory for assistance.
Output Module Vref RTH
VI-200/VI-J00 ³3.3 V 2.50 V 10.0 kW
VI-200/VI-J00 <3.3 V 0.97 V 3.88 kW
(Remote Sense)
Load
(Local Sense)
+P +Out
J2-2 +Sense
J2-3 -Sense
-P -Out
Use 22-24 AWG
Twisted Pair Wire
s
Figure 9.
Sense Leads
Table 1.
Module Internal Reference
Voltages and Thevenin
Resistances

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 19
Interface Connections (Cont.)
Example:
±10% Trim adjust on a 12 V nominal output.
Figure 10 shows a typical variable Trim circuit. Using a 10 k trimpot (R7), the resistor
values for R6 and R8 can be calculated as follows:
V1= Vref + 10% = 2.75 V Given: Vref = 2.5 V (see Table 1)
IR5 = (2.75 V - Vref)/RTH = (2.75 V - 2.5 V)/10 kW = 25 mA
Setting the bottom limit:
VR6 = 2.5 V - 10% = 2.25 V
And since IR5 = IR6 = 25 mA,
R6 = VR6/IR6= 2.25 V/25 mA = 90 kW
V2= V1+ VR6 = 2.75 V + 2.25 V = 5 V
IR7 = V2/R7 = 5 V/10 kW = 500 mA
IR8 = IR7 + IR6 = 525 mA
VR8 = (Vnom +10%) - V2= 13.2 V - 5 V = 8.2 V Given: Vnom = 12 V
R8 = VR8/IR8 = 8.2 V/525 mA = 15.62 kW
Using the above resistor combination, a 12 V output can be trimmed externally up
to 13.2 V and down to 10.8 V. For further information on external trimming, refer to
Chapter 5 of the Applications Manual or consult the factory for assistance.
CONSULT APPLICATIONS ENGINEERING WHEN TRIMMING OUTPUTS THAT ARE 5 V OR LESS.
(Remote Sense)
Load
+P +Out
J2-2 +Sense
J2-3 -Sense
-P -Out
Use 22-24 AWG Twisted Pair Wire
s
R5
V
Ref
J2-1
R6
R8
R7
To Error
Amplifier
R4
R3
R2
R1
+
+
V2
V1
-
-
RTH
Use 22-24 AWG
Twisted Pair Wires
Figure 10.
External Trim

UG:110 vicorpower.com Applications Engineering: 800 927.9474 Page 20
Input Characterisitcs
Input Voltage 90-132 Vac, 180-264 Vac; 47-500 Hz; 260-380 Vdc
Power Factor (passive) 0.65 typical
Inrush Current (Cold Start) 80 A pk @ 115 Vac
80 A pk @ 115 Vac
Ride Through Time >20 ms at nominal line, full load
Power Fail >3 ms warning
Conducted EMI EN55022 Class A and B
Surge Immunity EN61000-4-5 Installation Class 3, Performance Criteria B
(Temporary loss of output power may occur which is self recoverable)
Dielectric Withstand
Primary to Chassis GND = 2,121 Vdc
Primary to Secondary = 4,242 Vdc
Secondary to Chassis GND = 750 Vdc
Ouput Characterisitcs
Line/Load Regulation 0.2% max. from 10% to 100% load
0.5% max. from 0% to 10% load
Setpoint Accuracy 1% for standard voltages
2% for special or adjustable voltages
Ripple and Noise
Std. outputs: 2% or 100 mV p-p, whichever is greater, 75% min. load;
VXI options: V1 = (150 mVp-p or less) 15 V < Vout < 24 V outputs
V2 = (50 mVp-p or less) Vout < 15 Vdc
V3 = (1% ripple or less) Vout > 24 V
(VXI options require 15% minimum load)
RamPAC: 10 mVp-p. or 0.15% whichever is greater
FlexPAC: 50 mVp-p
Output Trim Range 50% -110% of nominal voltage VI-200/VI-J00 series modules
90% -110% of nominal voltage VI-200/VI-J00 series modules 10-15 V
Overcurrent Trip Point 105-125% of full load capability of VI-200/VI-J00 series modules
Overvoltage Protection ModuPAC 115- 135%; N/A to DualPACs, JuniorPACs, BatPACs, RAMPACs
Efficiency 82% typical
Output Power 1,000 W @115 Vac or 230 Vac (strappable)
Environmental Characteristics
Storage Temperature -40°C to 85°C
Operating Temperature* -20°C to 45°C, -20°C to 65°C half power
Altitude Derate 2.6% total output power for each 1,000 ft to a maximum operating
altitude of 15,000 ft. Non-operating storage maximum altitude is 40 K.
Humidity 0 to 95% non-condensing
Safety Approvals
TUV CUE
Standards: CSA-C22.2 No. 60950-00, UL 60950 3rd Edition, EN 60950:2000
CE Mark to the LVD, 73/23/EEC amended by 93/68/EEC
Product Weights 6.25 lbs (2,84 kg) fully configured
0.7 lbs (0,32 kg) ConverterPAC
Warranty 2 years limited warranty.
See vicorpower.com for complete warranty statement.
* Operating temperature is 45°C using any combination of modules and output voltages as long as the
front end rating is not exceeded. Normal derating applies to half power if the ambient temperature is
20°C hotter.
Specifications