Vicor 4kW MegaPAC AC-DC Switchers User Manual

USER GUIDE | UG:107

S

NRTL

CUS

3 Phase MegaPACTM
4kW MegaPAC

TM

AC-DC Switcher

August 2013

Contents Page

Overview 1
of Product

Mechanical 2
Considerations

MegaPAC 3
Do’s and Don’ts

Technical Description 4

Configuring and 5
Reconfiguring
MegaPACs

ConverterPAC 6
Description

Part Numbering 10

Quick Install 12
Instructions

Mechanical Drawings 15

Interface Connections 17

Specifications 24

Current Share Boards 26

Low Leakage Version 29

4kW MegaPAC

3 Phase MegaPAC

Overview

The 3 Phase MegaPAC and 4kW MegaPAC are field-configurable, single or multiple
output switchers providing up to 2,000 W (3 Phase MegaPAC) to 4,000 W (4kW
MegaPAC) of output power. The chassis has 10 slots and can provide up to 40 regulated,
fully isolated outputs. It achieves power densities of 4.4 Watts per cubic inch (3 Phase
MegaPAC) to 7.8 Watts (4kW MegaPAC) per cubic inch. The dimensions of the 3 Phase
MegaPAC are 4.9"H x 7.5"W x 12.3"L (124,5 mm x 190,5 mm x 312,4 mm) and the
dimensions of the 4kW MegaPAC are 4.9"H x 7.5"W x 14"L (124,5 mm x 190,5 mm x
355,6 mm). The 4kW MegaPAC is longer than the 3 Phase MegaPAC to
accommodate a 2nd fan.

A complete power supply is configured at the factory by selecting and inserting up
to ten same length slide-in output assemblies called ConverterPACs. ConverterPACs
incorporate one or two VI-200/VI-J00 and/or Maxi Vicor DC to DC converters and are
available in a wide selection of outputs 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 ConverterPACS, refer to
the ConverterPAC information sheet. The 4kW MegaPAC uses VI-200/VI-J00 and Maxi
Vicor DC to DC converters while the 3 Phase MegaPAC uses VI-200/VI-J00 Vicor
DC to DC converters.

Manufactured at Westcor, a division of 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 with one of the same length and has the
desired voltage power rating. For additional flexibility, same length ConverterPACs
can be connected in parallel to increase output power (booster ConverterPACs), or in
series for higher voltages (total output voltage should not exceed 400V). 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.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 1

Standard Features

n Input: 3Æ 208/240 Vac Wye or Delta, 1Æ 180-264 (47-500Hz) or 260–352 Vdc

n Power Output: 3 Phase MegaPAC: 2,000W with 3Æ input; 1,200W

with 1Æ input; 1–20 outputs

4kW MegaPAC: 4,000W with 3Æ input; 1,500W
with 1Æ input; 1–20 outputs

n 10 slots (up to 20 outputs)

n Fan cooled (the 4kW MegaPAC has 2 fans)

n Full power to 45°C; half power to 65°C

n Power factor correction (passive) 0.92 PF (3Æ input)

n Conducted EMI meets EN 55022 Level A

n AC Power OK and AC Power Fail status signals

n Output Sequencing and General Shutdown

(Consult Applications Engineering for automatic sequencing circuitry.)

n Autosense (Refer to page 11 and page 15 for more information on Autosense)

n Overcurrent protection on all outputs

n Overtemperature limiting (not applicable with VI-J00 modules)

n Output overvoltage protection (not applicable with VI-J00 modules)

n Ride-Through time: >20 ms at nominal line (full load)

n Size: 4 kW MegaPAC: 4.9"H x 7.5"W x 14"L

(124,5mm x 190,5mm x 355,6mm) Regular chassis

Size: 3 Phase MegaPAC: 4.9"H x 7.5"W x 12.3"L
(124,5mm x 190,5mm x 312,4mm) Regular chassis

n Safety Agency Approvals: CE Mark, UL, CSA, TUV

Optional Features

n DC OK status signal

n Output voltage adjustment range with built-in potentiometer

n Reversed fan airflow direction

n Industrial-grade screening of output converters

n Current Share Boards - See page 27 and 28

Mechanical Considerations

The 3 Phase MegaPAC and 4kW 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" minimum clearance at both ends of the 3 Phase
MegaPAC and 4kW MegaPAC and route all cables so airflow is not obstructed. The
standard unit draws air in at the fan side/AC input side and exhausts air out the load
side. If airflow ducting is used, use caution, as sharp turns could present back pressure
to the 3 Phase MegaPAC and 4kW MegaPAC. The fans move approximately 50 CFM of air
for the 4kW MegaPAC and 30 CFM for the 3 Phase MegaPAC. The 4kW MegaPAC has a
second fan for additional cooling capabilities.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 2

Avoid excessive bending of output power cables aer they are connected to the 4kW
MegaPAC or 3 Phase MegaPAC. For high-current outputs, use cable ties to support heavy
cables in order to minimize mechanical stress on output studs. Be careful not to short­out to neighboring output studs. The 3 Phase MegaPAC and 4kW MegaPAC is supplied
with serrated, flanged hex-nuts on all output studs, so thread locking compounds or lock
washers are not required. The maximum torque recommended on flanged nuts is 45 lb­in. 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.

MegaPAC Do’s and Don’ts

n For units without Autosense, do not leave ConverterPAC Sense lines open. Always

terminate them at their respective outputs locally or at the load. Use twisted
pair 22-24 AWG wire. If ConverterPAC has Autosense, no local sense connection
is required. See page 13 and 17 for more information on Autosense.

n If needed, use Connector Kit # 19-130041 for the 3 Phase/4kW MegaPACs.

n Always 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 degrade thermal performance can result in overheating and

damage to the power supply.

n Do not unplug ConverterPACs while input power is applied. They are not

designed for hot-plug applications.

n Do not restrict airflow to the unit. Leave 2 inch minimum space in front and

behind the supply. The cooling fan draws air into the unit and forces it out at the

output power terminals.

n For power expansion, use booster ConverterPACs. Viewing the unit from the output

terminal side, always insert boosters to the right side of the driver.

n Do not use boosters as independent outputs. Disconnecting bus bars will damage

booster ConverterPACs.

n Always ensure that output hex-nuts arer properly torqued before applying

power to supply.

n For booster arrays, do not remove busbars.

n Run the output (+/–) power cables next to each other to minimize inductance.

n Wait 5 minutes aer shutting o power before inserting or removing ConverterPACs.

n The MegaPACs does 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.

n Insert proper fault protection at power supply input terminals (i.e., a fuse).

n Use proper size wires to avoid overheating and excessive voltage drop.

n Never loosen the inner nut on a ConverterPAC.

n Verify output nuts are tight before powering up.

n Only use the regular length ConverterPACs in the 3 Phase/4kW MegaPAC chassis.

You cannot use any of the Extended Length ConverterPACS which are only used in
the EL (Low Noise) products.

n Keep in mind that currently, the UniPAC ConverterPAC can only be used in

the 4kW MegaPAC.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 3

Technical Description

The 3 Phase MegaPAC and 4kW MegaPAC are configured by installing same length
ConverterPAC assemblies into the chassis. The chassis takes AC input power and
performs filtering and rectification functions. The ConverterPACs plug into a high­voltage backplane and provide low-noise, independently regulated and fully isolated
outputs.

Input AC mains voltage (L1, L2, L3 and GND) is applied to an agency approved mating
plug. The input current is passed through an EMI filter designed to meet EN 55022 Level
A before it is passed to a three-phase full-wave bridge rectifier. The rectifier charges
storage capacitors and delivers unregulated 300 Vdc to a backplane aer passing
through a large choke that improves input power factor. The power factor typically
exceeds 0.9 depending upon load, line voltage, frequency and line balance. Inrush
current is actively controlled with an IGBT and never exceeds 30A peak regardless of hot
or cold starts.

A housekeeping supply, isolated from the AC input, powers the brushless DC cooling
fan and other input monitoring circuits, in addition to providing an auxiliary +5V power
source for the user. The 4kW MEGAPAC HAS A SECOND FAN FOR EXTRA COOLING.
Excessive input currents caused by loss of a phase or excessive output loading in single
phase operation will safely shut down the unit until input power is recycled. This occurs
when the peak input current reaches 30A . An analog temperature monitor is provided,
as well as overtemperature shutdown. An active-high TTL compatible Enable control is
included for each ConverterPAC assembly, as well as an active-low General Shutdown
control; the polarities, active-high or active-low, are factory set. The 3 Phase MegaPAC
and 4kW MegaPAC can be safely paralleled (with another of its own kind) with accurate
current sharing for high power systems. All interface signals are safety isolated using a
common floating return.

Upon power-up, all outputs are first disabled to limit the inrush current, and to allow
the unregulated bus to reach correct operating levels for ConverterPAC assemblies. The
internal housekeeping supply comes up within 500 ms aer input power is applied, and
the AC Power OK signal asserts to a TTL "1," indicating the input power is OK. The low
voltage power outputs come up within 10-20 ms aer the AC Power OK asserts to a TTL
"1." Output ramp-up time from Enable or General Shutdown is 10-20 ms. Output fall
time from Disable is dependent on load, but is typically a few hundred microseconds.

Figure 1.

3 Phase MegaPAC and 4kW

MegaPAC Architectures

J1
Input
Power

J10
Customer
Interface

3 Phase/4kW MegaPAC Chassis

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 4

EN 55022

Level A

Start-up Control

Circuits

Opto-isolated

Control/Status

3 Phase

Full-Wave

Rectifier

DC Brushless

Cooling Fan

PFC Choke

IGBT

Isolated
Housekeeping
Power Supply

Fuse

ConverterPAC (Up to 10)

DC/DC

Converter

+P, -P
Output
Power

Remote Sense,
Trim Interface

Power Good
Interface

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. 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. For outputs
greater than 500 Watts (in the 4kW MegaPAC), a driver UniPAC and one or more booster
UniPACs 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 5 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 of the same length 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, as 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 10. Please note that
total output voltage should not exceed the converter baseplate-output isolation rating of
400V. For detailed guideline on how outputs should be placed in series, please refer to
the Applications note available on the website at www.vicorpower.com.

Figure 2.

Paralleling ConverterPACs

Bus Bars for Paralleling

Loosen screw to

remove ConverterPAC

4

1

2

3

Driver

Boosters: Slots 2, 3, 4

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 5

L1 L2 L3

5

6

8

7

9

10

Remote Sense

VI-200

Output Adjust

- Vout

+ Vout

DC OK (Power Good)

Remote Sense
Output Adjust

- Vout

+ Vout

DC OK (Power Good)

Remote Sense

Output #2 Adjust

Output #2

Output #1

Remote Sense

Output #1 Adjust

Remote Sense
Output Adjust

- Vout

+ Vout

DC OK (Power Good)

+ Vout

- Vout

Remote Interface

Voltage Limit Adjust

Current Limit Adjust

Remote Sense

Output Adjust

- Vout

+ Vout

DC OK (Power Good)

VI-J00

VI-J00 VI-J00

M2

M1

ModuPAC

JuniorPAC

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 or between dierent AC input chassis. They can be added, moved, or changed
as necessary. The following ConverterPACs can be used in the 3 Phase and 4kW
MegaPACs.

ModuPAC

+

The ModuPAC output assembly consists of a VI-200 Vicor DC to DC converter that
converts the unregulated 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.

+

JuniorPAC

The JuniorPAC consists of a VI-J00 Vicor DC to DC converter that converts the

_

unregulated high voltage bus to the desired regulated output voltage. JuniorPACs can
provide up to 100 Watts of output power.

M1

DualPAC

This output assembly consists of two VI-J00 Vicor DC to DC converters that convert the

M2

unregulated high voltage bus to the desired regulated output voltages.

VI-J00 RAM

VI-200/BatMOD

Maxi

DualPAC

RAMPAC

BatPAC

UniPAC

+

RAMPAC

This output assembly consists of a VI-J00 Vicor DC to DC converter with a Ripple

_

Attenuator Module (RAM) and is designed for applications requiring low output ripple/
noise.

+

BatPAC

The BatPAC output assembly consists of a VI-200 BatMod current source that converts

_

the unregulated high voltage bus to the desired regulated output voltage. The BatPAC is
a 200 Watts programmable current source that can be configured as a battery charger.

UniPAC

+

The UniPAC output assembly consists of a Maxi Vicor DC-DC module that converts
the unregulated high voltage bus to the desired regulated output voltage. UniPACs can

_

provide up to 500W of power. Multiple UniPACs can be paralleled in a driver-booster
configuration to provide more power. The UniPAC can only be used in the 4kW

MegaPAC (not in the 3 Phase MegaPAC or any other MegaPACs).

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 6

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

ConverterPAC Functional Description (Cont.)

FlexPAC

The FlexPAC output assembly consists of from 2 to 4 discrete outputs that convert the
high output bus to the desired output voltage. Each FlexPAC output can be manually
trimmed from 2V to 25V and supports up to 5 amps with a maximum output powerof
50W per output. All outputs maintain less than 50mV 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 3 Phase/4kW MegaPACs and their features

ConverterPAC OVP OCP OTL RS/AS* LS/AS* PG TrimPot

ModuPAC Std Std Std AS* AS* Opt Opt

JuniorPAC N/A Std N/A AS* AS* Opt Opt

DualPAC N/A Std N/A AS* AS* N/A Opt

RAMPAC N/A Std N/A AS* AS* Opt Opt

BatPAC N/A Std N/A N/A N/A N/A Std

UniPAC** Std Std N/A AS* AS* Opt Opt

* See page 13 and 17 for more information on Autosense.
** Currently, the UniPAC (XU) can only be used in the 4kW MegaPAC.

OVP Overvoltage Protection (latching) OCP Overcurrent Protection (auto-recovery)

OTL Overtemperature Limiting (latching) RS Remote Sense

PG Power Good (DC OK TTL Signal) LS Local Sense

AS Autosense

Note: All ConverterPACs mentioned above can be paralleled EXCEPT the DualPAC,
JuniorPAC and RamPAC.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 7

DUALPAC

BATPAC

DualPAC

20-130182-TAB

ConverterPAC Output and Connector Pin Identification for the
3 Phase/4kW MegaPACs

J1-B-PIN1

J2-B-PIN1

OUTPUT ADJUST

J1-A-PIN1

J2-A-PIN1

OUTPUT ADJUST

(OUTPUT CONNECTORS)

1 AND 4 +V OUT

1

4

2 AND 5 -V OUT

2

5

6

3

3 +R/SENSE 6 -R/SENSE

J2

(REMOTE SENSE)

TRIM PIN ACCESS

1

2

+ SENSE

3

- SENSE

MATING HDWR:

HOUSING- MOLEX P/N: 39-01-2060

TERMINALS- MOLEX P/N: 39-00-0039

CRIMP TOOL MOLEX P/N: 11-01-0197

MATING HDWR:

HOUSING- MOLEX P/N: 50-57-9403

TERMINALS- MOLEX P/N: 16-02-0103

CRIMP TOOL MOLEX P/N: 11-01-0208

J1

DUALPAC - COMPONENT SIDE VIEW

BatPAC

Output A
48V/2.1A

+ V0UT

CURRENT LIMIT ADJUST

VOLTAGE LIMIT ADJUST

- VOUT

J2-PIN1

M2

M1

Output B
12V/8.3A

Example: D12V/8.3A-48V/2.1A

J2 (BATPAC REMOTE INTERFACE)

CURRENT LIMIT ADJUST

4

3

VOLTAGE LIMIT ADJUST

2

CURRENT MONITOR

1

- VOUT

J1-B (M1)

J1-A (M2)

MATING HDWR:

HOUSING- MOLEX P/N: 39-01-0043

TERMINALS- MOLEX P/N: 30-00-0031

CRIMP TOOL MOLEX P/N: 57005-5000

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 8

ConverterPAC Output and Connector Pin Identification for the

UNIPAC

3 Phase/4kW MegaPACs (Cont.)

UniPAC

ModuPAC

JuniorPAC

RamPAC

+ V0UT

OUTPUT ADJUST

- VOUT

P2-PIN1

+ V0UT

J2-PIN1

0UTPUT ADJUST

- VOUT

J3-PIN1

P2 REMOTE SENSE TRIM/SC & POWER GOOD

+SENSE

7

6

-SENSE

5

TRIM

4

Vcc IN

3

POWER GOOD

2

POWER GOOD INVERTED

1

SIGNAL GROUND

(REMOTE SENSE)

J2

TRIM PIN ACCESS

1

2

+ SENSE

3

- SENSE

J3 DC OK (POWER GOOD)

Vcc IN

4

3

POWER GOOD

2

POWER GOOD INVERTED

1

SIGNAL GROUND

MATING HDWR:

HOUSING- MOLEX P/N: 39-01-0073

TERMINALS- MOLEX P/N: 39-00-0031

CRIMP TOOL MOLEX P/N: 57005-5000

MATING HDWR:

HOUSING- MOLEX P/N: 50-57-9403

TERMINALS- MOLEX P/N: 16-02-0103

CRIMP TOOL MOLEX P/N: 11-01-0208

MATING HDWR:

HOUSING- MOLEX P/N: 39-01-0043

TERMINALS- MOLEX P/N: 30-00-0031

CRIMP TOOL MOLEX P/N: 57005-5000

FlexPAC

M-1 STATUS

M-2 STATUS
M-1 VOLTAGE ADJUSTMENT
M-2 VOLTAGE ADJUSTMENT

CONNECTOR J1

M-3 VOLTAGE ADJUSTMENT
M-4 VOLTAGE ADJUSTMENT

M-3 STATUS

M-4 STATUS

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: The UniPAC can ONLY be used in the 4kW MegaPAC.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 9

Part Numbering

3Ø MegaPAC MPx1-5x2xxxx

eg. MP4-510108

MP = MP

x1 = number of outputs

9 = 3 Phase MegaPAC chassis

x2 = number of modules

xxxx = assigned by Westcor

4kW MegaPAC MPx1-4x2xxxx-x3x4-x5-x

With VI-200/VI-J00 eg. MP10-410008-23
With Maxi eg. MX10-410008-23

MP = MP

6

x1 = number of outputs
4 = 4kW MegaPAC chassis
x2 = number of modules
xxxx = assigned by Westcor

x

= Optional Code 2 = VI-J00 or VI-200 module in slot #1; 3 = Maxi in Slot 1

3

x4 = Optional Code 2 = VI-J00 or VI-200 module in slot #10; 3 = Maxi in Slot 10
x5 = Optional Code
x6 = Optional Code

ConverterPAC XxDV/xEAx

eg. M15V/10A
eg. M15V/10ADF
eg. D15V/6.7A-12V/8.3AT

X = ConverterPAC type - If RoHS precede with a “G”

F

M = ModuPAC D = DualPAC R = RamPAC J = JuniorPAC B = BatPAC
XU = UniPAC (currently only used in the 4kW MegaPAC)
xD = Voltage out

x

= Current out (rounded to 1 decimal point)

E

xF = Can be multiple options* (see below)

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 10

* ConverterPAC options

Booster module (SI for FasTrak)

B

D DC OK or Power Good

1

F Full 50-110% output adjustment

50-107.5% output adjustment

F1

50-105% output adjustment

F2

50-102.5% output adjustment

F3

50-100% output adjustment

F4

60-110% output adjustment

F5

70-110% output adjustment

F6

80-110% output adjustment

F7

90-110% output adjustment

F8

100-110% output adjustment

F9

I-/H-Grade module

I/H

Custom SRF module used

K

2

M Grade module

M

Preload

P

R RAM external

Trimpot removed for external BatPAC adjustment

S

T 90-110% output adjustment

90-107.5% output adjustment

T1

90-105% output adjustment

T2

90-102.5% output adjustment

T3

90-100% output adjustment

T4

98-105% output adjustment

T5

100-110% output adjustment

T6

V1 "VXI" low noise (150 mV)15 V < V

"VXI" low noise (50 mV) V

V2

1% ripple for outputs >24 V

V3

3

4

≤ 24 V outputs

OUT

≤ 15 Vdc

OUT

5

[1]

D option: Optional for all ConverterPACs EXCEPT the DualPAC, BatPAC

[2]

F option: Optional for all ConverterPACs EXCEPT the BatPAC and DualQPAC

[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 options: Optional for all ConverterPACs EXCEPT the BatPAC and DualQPAC

[5]

V options: Optional ONLY on the ModuPAC, DualPAC and JuniorPAC. N/A on all other
ConverterPACs.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 11

3 Phase and 4kW MegaPACs

MODUPAC

“Quick Install” Instructions (For Mechanical Drawing, see pages 15)

Mounting the 3 Phase MegaPAC and 4kW MegaPAC

n The 3 Phase MegaPAC and 4kW MegaPAC can be mounted on any of four sides.

n Use #8-32 or 4mm mounting screws. Maximum penetration should

not exceed 0.15" (3,8mm).

n A minimum of 2" (5,1cm) clearance must be maintained at either end of

the supply in order to insure proper airflow and cooling.

n Maximum allowable torque is 20 lb-in.

J1

J1-1 Line 3

J1-2 Line 2

J1-3 Line 1

J1-4 Earth Ground

Input Panel Connectors

+ V0UT

J2-PIN1

0UTPUT ADJUST

- VOUT

J3-PIN1

Single Output ModuPAC

46

++-

PIN

J1B

5

-RS

-

+RS

321

+46-

+

J1A

5

-RS

-

+RS

321

1 & 4 +V OUT

2 & 5 -V OUT

3 +REMOTE SENSE

6 -REMOTE SENSE

DualPAC Output Connector

Input Connections

Input Power J1

n Input AC power is applied to terminal block J1 using mating receptacle AMP

#54483-4 with #53892-4 crimp or #54329-1 solder terminals provided.

n Use size 12 AWG wire with soldered terminals.

n A fuse or circuit breaker in the input line is required for safety reasons.

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 Remove outer nut. Do not remove or loosen inner 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.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 12

Sense Connector

J2

Pin

1

J2-1 Trim Pin Access

2

J2-2 +Sense

3

J2-3 -Sense

J2 Sense Connectors

P2 REMOTE SENSE,
TRIM/SC & POWER GOOD

+SENSE

7

6

-SENSE

5

TRIM

4

Vcc IN

3

POWER GOOD

2

POWER GOOD INVERTED

1

SIGNAL GROUND

3 Phase and 4kW MegaPACs “Quick Install” Instructions (Cont.)

Sense Connections

Note: Newer power supplies may have a new feature installed called Autosense. For
units with Autosense, 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 15 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.

Sense Connector J2 (P2 for the UniPAC):

n 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. Only applies to units without Autosense.)

n Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals provided.

n J2-2 is the +Sense and J2-3 is the -Sense.

n Attach terminals to 22-24 AWG twisted pair wire using Molex tool #11-01-0208.

n Attach opposite ends of Sense lines to point where regulation is desired.

n Verify that Sense lines are not cross-connected before applying input power.

n For the UniPAC, P2-7 is the + Sense and P2-6 is the -Sense.

n Use Molex mating receptacle #39-01-0073 with #39-00-0031 terminals provided

n Attach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.

46

++-

PIN

J1B

5

-RS

-

+RS

321

+46-

+

J1A

5

-RS

-

+RS

321

1 & 4 +V OUT

2 & 5 -V OUT

3 +REMOTE SENSE

6 -REMOTE SENSE

DualPAC Output Connectors

Sense Connectors on DualPACs:

n 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. Only applies to units without Autosense.)

n Sense connections are available on the J2, P2 or the J1A and J1B connectors.

n If using J2 or P2 connectors, see page 11.

n For J1A and J1B, Pin 3 is the +Sense and Pin 6 is the -Sense.

n Use Molex mating receptacle #39-01-2060 with #39-00-0039 terminals provided.

n Attach terminals to 18-24 AWG twisted pair wire using Molex tool #11-01-0197.

n Verify that Sense lines are not cross-connected before applying input power.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 13

3 Phase and 4kW MegaPACs “Quick Install” Instructions (Cont.)

Sense Connector

J2

Pin

1

J2-1 Trim Pin Access

2

J2-2 +Sense

3

J2-3 -Sense

J2 Connectors

DC OK (Power Good)

Pin

J3

4

4 Vcc

3

3 Power Good

2
1

2 Power Good Inverted
1 Signal Ground

J3 Connectors

PIN

P2

7

6

5

4

3

2

1

J3 Connectors

+ Sense

-Sense

Trim

Vcc In

Power Good

Power Good Inverted

Signal Ground

J2 Trim Connection (and P2 for UniPACs)

n The J2 remote Trim connection should only be used if the local Trim option has not

been installed. (A “T” or an “F” in the ConverterPAC part number means the Trim
option is installed; e.g. M5V/40AT.)

n Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals provided and

22-24 AWG stranded wire using Molex tool 11-01-0208.

n J2-1 provides Trim access.

n For the UniPAC, refer to P2 Connector. P2-5 provides Trim Access.

n Use Molex mating receptacle #39-01-0073 with #39-00-0031 terminals provided.

n Attach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.

DC OK (Power Good)

n DC OK is only available as an option and is only present when requested.

n Use Molex mating receptacle #39-01-0043 with #39-00-0031 terminals provided.

n Attach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.

n For the UniPAC, refer to the P2 Connector. P2-3 is Power Good.

n Use Molex mating receptacle #39-01-0073 with #39-00-0031 terminals provided.

n Attach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.

Interface Connections J10

n J10-7 to 11 and J10-20 to 24 are Enable/Disable for slots 1-10.

n J10-16, 17 are Vcc, J10-12 and 15 are Signal Ground, J10-18 is AC Power OK,

and J10-5 is General Shutdown.

J10 INTERFACE CONNECTOR IDENTIFICATION

Phase Fail

14
15

Signal Ground

16

Vcc +5 volt, 300 mA

17

Vcc +5 volt, 300 mA

18

A.C. Power OK

19

A.C. Power Fail

20

Enable/Disable # 9

21

Enable/Disable # 7

22

Enable/Disable # 5

23

Enable/Disable # 3

24

Enable/Disable # 1

25

Gate # 10 (Output (Isolated)

1411615

234

56

191817

78 9

Signal Ground1

2

1110 12

13

25

222120

2423

Signal Ground

3

Overtemperature Warning

4

Analog Temperature

5

General Shutdown

6

No Connection

7

Enable/Disable # 10

8

Enable/Disable # 8

9

Enable/Disable # 6

10

Enable/Disable # 4

11

Enable/Disable # 2

12

Signal Ground

13

Gate # 1 Input (isolated)

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 14

3 Phase MegaPAC Mechanical Drawings

4.90 (124.5 MM)

2

BUS BARS - FOR
PARALLEL OUTPUTS

J2B-PIN1

(SAME AS J2)

DUAL CONVERTERPAC

1

(NO "POWER GOOD"
OPTION AVAILABLE)

J1B-PIN1

(DUALPAC)

J1A-PIN1

(DUALPAC)

AIR BLOCK
(EXAMPLE)

BUS BAR - FOR
SERIES OUTPUTS

J2-PIN1

+P8
TYP.

+P1
TYP.

-P1
TYP.

R12

J2A-PIN1

(SAME AS J2)

1.15 (29.2 MM)

.560 (14.2 MM)

-P8 TYP.

R4

.54 (13.7 MM)

AMP NO. 746862-2 PLUG

FOR FLAT RIBBON CABLE

MATES WITH HSG AMP NO.
747547-2 PLUS SLIDE
LATCH OR SIMILAR.

(10.2 MM)

.40

1.852

(47.0 MM)

LL

C

(12X) 1/8 X 1/2 SLOTS

.240 (6.1MM)

6.56 (166.6 MM)
9=SP. @ .7285

(18.5 MM)

1.852

(47.0 MM)

J3-PIN1

L3

L2L1

208/240 VAC 3ÿ

15A 47-440 HZ

1.20 (30.5 MM)

NO. 54489-4 HOUSING

MATING HSG IS AMP NO.
ARE AMP 53892-5 CRIMP

SOLDER.

2.068

(52.5 MM)

.31 X 1.25 AMP

C

.46 (11.7 MM)

FOR 3 PHASE INPUT W/GROUND.

54483-4 AND CONTACTS

OR AMP NO. 54329-1

(16X) M4/#8-32 TAPPED HOLE
.15 MAX. PENETRATION

(190.5 MM)

.150 (3.8 MM)

7.50

3O

MegaPAC

COR
I

V

2.25

(57.2 MM)

STANDARD AIR FLOW

2.25 6.75 (171.5 MM)

(57.2 MM)

WESTCOR

6.75 (171.5 MM)

11.95 (303.5 MM)

12.28 (311.2 MM)

LABEL LOCATED
APPROXIMATELY
AS SHOWN

DO NOT LOOSEN OR

TIGHTEN INNER NUTS

5.10 (129.5 MM)

#4-40 CAPTIVE SCREWS
TO SECURE CONVERTERPACS
10 PLACES

1.20 (30.5 MM)

LABEL LOCATED
APPROXIMATELY
AS SHOWN (TYP)
(CONVERTERPAC MODEL NO.)

.60 (15.2 MM)

CONVERTERPAC REMOVAL

1.40

(35.6 MM)

4.00

(101.6 MM)

.65 (16.5 MM)

1/4 - 20 ZINC PLATED STEEL,
SERRATED FLANGED NUTS
45 IN-LBS ±5
(OUTER NUT ONLY)

6.50 (165.1 MM)

.50 (12.7 MM)

2.25

(57.2 MM)

BOTTOM VIEW

6.75

(171.5 MM)

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 15

4kW MegaPAC Mechanical Drawings

LL

C

AMP NO. 746862-2 PLUG

MATES WITH HSG AMP NO.

FOR FLAT RIBBON CABLE

LATCH OR SIMILAR.

747547-2 PLUS SLIDE

.40

(10.2 MM)

1.852
(47.0 MM)

(12X) 1/8 X 1/2 SLOTS

.240 (6.1MM)

(18.5 MM)

9=SP. @ .7285

6.56 (166.6 MM)

1.852

3

(47.0 MM)

GOOD

J3-PIN1

POWER

2.068

L3

(52.5 MM)

L2L1

C

.46 (11.7 MM)

1.20 (30.5 MM)

15A 47-440 HZ
208/240 VAC 3Ø

.31 X 1.25 AMP

NO. 54489-4 HOUSING

MATING HSG IS AMP NO.

54483-4 AND CONTACTS

ARE AMP 53892-5 CRIMP

FOR 3Ø INPUT W/GROUND.

OR AMP NO. 54329-1

SOLDER.

1/4 - 20 ZINC PLATED STEEL,

SERRATED FLANGED NUTS

45 IN-LBS ±5

(OUTER NUT ONLY)

DO NOT LOOSEN OR

TIGHTEN INNER NUTS

BOTTOM VIEW

6.75

(171.5 MM)

J2-PIN1

2

-P8 TYP.

.560 (14.2 MM)

TYP.

+P8

BUS BARS - FOR

PARALLEL OUTPUTS

R4 "TRIMPOT" PRESENT

WHEN ADJUSTABLE OUTPUT

5.10 (129.5 MM)

R4

J2B-PIN1

(SAME AS J2)

DUAL MODUPAC

(NO "POWER GOOD"

1

OPTION IS SPECIFIED

J2A-PIN1

R12

(SAME AS J2)

J1B-PIN1

(DUAL MOD)

J1A-PIN1

OPTION AVAILABLE)

1.20 (30.5 MM)

6.75 (171.5 MM)

(DUAL MOD)

AIR BLOCK

(EXAMPLE)

BUS BAR - FOR

LABEL LOCATED

APPROXIMATELY

AS SHOWN (TYP)

(MODUPAC MODEL NO.)

LABEL LOCATED

APPROXIMATELY

AS SHOWN

-P1

+P1

SERIES OUTPUTS

.25 (6.35 MM)

.54 (13.7 MM)

TYP.

TYP.

1.40

(35.6 MM)

1.15 (29.2 MM)

4.00

(101.6 MM)

.65 (16.5 MM)

12.28 (311.9 MM)

11.95 (303.5 MM)

2.25

6.50 (165.1 MM)

(57.2 MM)

.50 (12.7 MM)

V

I

COR

2.25

(57.2 MM)

AIR FLOW

STANDARD

2.25 6.75 (171.5 MM)

(57.2 MM)

1.64
(41.8 MM)

7.50

.15 MAX. PENETRATION

(16X) M4/#8-32 TAPPED HOLE

(190.5 MM)

4.90 (124.5 MM)

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 16

Figure 3.

Input Panel Connector

Interface Connections

Chassis Input Power Terminals (J1)

Input AC power is applied to a plug-in connector, J1, that accepts soldered terminals
with a wire size of 12 AWG. For operation on high voltage DC input, input power can be
connected to any two input lines. A fault-clearing device should be installed at the input
of the unit. A user-accessible input fuse is not present within the unit. For an output
of 2,000-4,000W with operation on 208 Vac, 3Æ input, a 20A fuse in each input line is
acceptable. Input power cables should be shielded to minimize radiated noise eects.

J1

J1-1 Line 3

J1-2 Line 2

J1-3 Line 1

J1-4 Earth Ground

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 J1B. 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 may have some 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.

For units without 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 3 Phase
MegaPAC or 4kW 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, BatPACs,
or if the Local Sense option is specified.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 17

Figure 4.

Interface Connector (J10)

Interface Connections (Cont.)

Signal Ground (J10-1, J10-2, J10-12, J10-15)

Signal Ground (see Figure 4) is an isolated ground reference for all J10 interface 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 J1.

J10 INTERFACE CONNECTOR IDENTIFICATION

Signal Ground1

2

Signal Ground

3

Overtemperature Warning

4

Analog Temperature

5

General Shutdown

6

No Connection

7

Enable/Disable # 10

8

Enable/Disable # 8

9

Enable/Disable # 6

10

Enable/Disable # 4

11

Enable/Disable # 2

12

Signal Ground

13

Gate # 1 Input (isolated)

1411615

234

56

191817

78 9

1110 12

13

25

222120

2423

Enable/Disable and General Shutdown (GSD)

The Enable/Disable control lines allow ConverterPAC outputs to be sequenced either
on or o. For DualPACs, both outputs are sequenced. In parallel arrays, only the
driver ConverterPAC needs to be sequenced. The GSD control line on J10-5 allows
simultaneous shutdown of all ConverterPAC outputs. An internal factory-configured
jumper selects polarity, either active-high or active-low. Another jumper selects a pull­up or pull-down source for the HCMOS control inputs.

The standard Enable/Disable controls are configured as active-low with internal pull-up;
outputs are enabled when these pins are open-circuited or allowed to exceed 4.5 V with
respect to Signal Ground. Outputs are disabled when the Enable/Disable control lines
are pulled low to less than 0.7 V. The GSD control line is configured to be active-low with
internal pull-up; all outputs are simultaneously inhibited when the GSD control line
is pulled low to less than 0.7 V. All outputs are enabled when GSD is open circuited or
allowed to exceed 4.5 V. Do not apply more than 5 V to these inputs at any time. The E/D
and GSD circuits will sink up to 0.6 mA. If driven from an electromechanical switch or
relay, a small capacitor should be connected between the control line and Signal Ground
to eliminate latch-up due to the eects of switch bounce (1mF, typical). As noted, active
polarity and pull-up/down can be altered in the factory.

Phase Fail

14
15

Signal Ground

16

Vcc +5 volt, 300 mA

17

Vcc +5 volt, 300 mA

18

A.C. Power OK

19

A.C. Power Fail

20

Enable/Disable # 9

21

Enable/Disable # 7

22

Enable/Disable # 5

23

Enable/Disable # 3

24

Enable/Disable # 1

25

Gate # 10 (Output (Isolated)

Figure 5.

Enable/Disable and
General Shutdown

J10

+5 Volt Vcc 16

10K

Enable/Disable Output #1 24

499

10K

General Shutdown 5

Signal Ground 1, 2, 12, 15

3

1 2

JP1

1 2

3

JP2

499

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 18

Figure 6.

2

2

Enable/Disable Control

of Maxi Arrays

Interface Connections (Cont.)

Enable/Disable Control of Maxi Module Arrays

When using the Enable/Disable function on an output that consists of two or more Maxi
modules, it is necessary to connect the E/D pins of the corresponding module locations
together such that both modules are commanded to turn ON or OFF simultaneously.

Example: Slots 1 through 6 have been configured as a single output parallel array
(see Fig. 6)

In order to disable this array, E/Ds 1 through 6 should be shorted together as shown in
Fig. 6. With the E/Ds connected together, a single switch can then be used to remotely
enable and disable the output.

**Note: For single output power supply configurations, the simplest method of remotely enabling and
disabling the output is to use the General Shutdown (GSD) function.

12345678 109

Figure 7.

AC OK/Power Fail

2

4

6

8

10

L1 L2 L3

1

3

5

7

9

14

15 16

17 18

19 20

21 22

11

23 24

122513

AC Power OK (J10-18)

This signal on J10-18 provides a status indication of the AC input power (see Figure 7).
It is active high, TTL compatible and capable of sourcing 10 mA maximum. This signal
switches to a TTL “1” when the high voltage bus exceeds low-line condition during turn­on, 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.

2.49K

J10

14 Phase Fail

18 AC Power OK

19 AC Power Fail

+5V

4.99K

2.49K

222

2

10K

N222

2222

1, 2, 12,15 Signal Ground

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 19

Interface Connections (Cont.)

AC Power Fail (J10-19)

J10-19 is the inverse of AC Power OK, and goes to a TTL “1” when the input AC power is
not OK. It is capable of sourcing 10 mA maximum. The fan out is 20.

Phase Fail (Input Overcurrent) (J10-14)

J10-14 is a TTL level active-high signal that is asserted when the peak input current
reaches 30A due to the loss of an input phase or severe line imbalance. This occurs when
one input phase is lost with approximately 1400W output loading. Maximum current
that can be sourced is 10 mA.

Overtemperature Warning (J10-3)

J10-3 is a signal that asserts a TTL level "1" if the air temperature exceeds the following
factory set levels. The warning trip point is 65°C to 76°C, typically, and recovery point is
60°C to 71°C, typically.

Overtemperature Shutdown

If the inlet ambient air temperature exceeds the following factory set levels, the outputs
are disabled. The shutdown trip point is 70°C to 81°C, typically, and recovery point is
40°C to 48°C, typically.

Analog Temperature Monitor (J10-4)

This signal on J10-4, referenced to Signal Ground, provides an analog DC voltage output
between 0V and 10V that represents the air temperature of 0°C to 100°C inside the
power supply. The inlet air temperature is monitored close to the fan.

Gate IN/Gate OUT (J10-13, 25)

The 3 Phase MegaPAC and 4kW MegaPAC can be paralleled with other 3 Phase
MegaPACs and 4kW MegaPACs respectively to increase output power. The Gate Out
(or PC) pin of the ConverterPAC in slot #10 is available on J10-25, and can be used to
provide input to the Gate In (or PC) pin of the ConverterPAC in slot #1 of a dierent 3
Phase MegaPAC or 4kW MegaPAC. The ConverterPAC in slot #1 of the second chassis
must be a booster, and additional boosters can be connected in parallel to it. The
ConverterPAC in slot #10 of the first 3 Phase MegaPAC or the 4kW MegaPAC must be
either a driver or a booster in a parallel array. ConverterPACs paralleled from chassis to
chassis must be of the same type, voltage, and power.

The 3 Phase MegaPAC and 4kW MegaPAC are configured at the factory to allow box­to-box paralleling using the ConverterPACs originally shipped in the chassis. Since the
MegaPAC is a field configurable supply, the proper configuration must be verified before
paralleling from chassis to chassis. The last two digits of the 4kW MegaPAC part number
will identify whether slot #1 and slot #10 were configured for use with VI-200/VI-J00 or
Maxi ConverterPACs.

Using the example of MX7-410108-32, the last two digits, "-32," identify the type of
module in slot #1 and slot #10, respectively. A "3" indicates the chassis is configured to
parallel box-to-box using a Maxi converter. A "2" indicates the chassis is configured to
parallel box-to-box using a VI-200 converter. The above example shows the chassis is
configured for a Maxi converter in slot #1 and a VI-200 converter in slot #10.

When connecting multiple chassis in parallel, the signal ground on J10 of each chassis
should be tied together. Chassis outputs should be tied together near the power supply
and then cabled to the load. Using separate cables to provide power to the load will limit
the supplies' ability to current share properly.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 20

Figure 8.

Auxiliary Vcc

Interface Connections (Cont.)

Auxiliary Vcc +5V/0.3A (J10-16, 17)

The Vcc on J10-16, 17 is an auxiliary 5 V regulated power source (see Figure 8 and
Connector Pin Identification of page 18). 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, a J10 Signal Ground must also be connected to the J3-1 Signal Ground pin
of the ConverterPAC.

J10

78M05

+5V/300 mA

0.1 µF

Auxiliary Vcc

16, 17

1, 2, 12, 15

Signal Ground

Figure 9.

Power Good and Vcc

Power Good (J3-3)

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.

ConverterPAC

J3

2N2222

2.49K

10K

2.49K

4

3

2

1

Vcc In

Power Good

Power Good Inverted

Signal Ground

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 21

Interface Connections (Cont.)

Power Good Inverted (J3-2)

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. 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 J1.

Vcc In (J3-4)

The Vcc In on J3-4 is an input that requires +5V 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 J3-4, then at least one J10 Signal
Ground must be connected to Signal Ground on J3-1.

+Sense/ –Sense (J2-2 and J2-3)

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 0.5V (0.25 V per lead) can be obtained. Use
twisted pair 22-24 AWG wire for this purpose.

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.

Figure 10.

Sense Leads

+P +Out

J2-2 +Sense

J2-3 -Sense

-P -Out

(Local Sense)

(Remote Sense)

Use 22-24 AWG

Load

Twisted Pair Wires

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 22

External Trim (J2-1)

Output voltage can be trimmed using an optional factory-installed Trim potentiometer
or with the Trim pin (see Figure 11). 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 to 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 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 7 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 dier from those below. Please consult the
factory for assistance.

Figure 11.

External Trim

Output Module V

ref

R

TH

VE-200/VE-J00 ³3.3 V 2.5 V 10.0 kW

VE-200/VE-J00 <3.3 V 0.97 V 3.88 kW

Maxi (Pre-Defined) 1.23 V 1.0 kW

Maxi (User Defined) 1.23 V Consult Factory

Use 22-24 AWG Twisted Pair Wires

(Remote Sense)

+

2

V

-

Use 22-24 AWG Twisted Pair Wires

Load

To Error
Amplifier

+Out

R1

+Sense

R2

Trim

+

RTH

R5

V1

-

V

Ref

R3

R4

R6

-Sense

-Out

R8

R7

Example:

±10% Trim adjust on a 12 V nominal output.

Figure 11 shows a typical variable Trim circuit. Using a 10k trimpot (R7), the resistor
values for R6 and R8 can be calculated as follows:

V1 = V

IR5 = (2.75 V - V

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 23

+ 10% = 2.75 V Given: V

ref

)/RTH = (2.75 V - 2.5 V)/10 kW = 25 mA

ref

= 2.5 V (see Table 1)

ref

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 = (V

+10%) - V2 = 13.2 V - 5 V = 8.2 V Given: V

nom

nom

= 12 V

R8 = VR8/IR8 = 8.2 V/525 mA = 15.62 kΩ

Using the previous 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 BELOW 5V.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 24

Specifications

Input Characterisitcs

Input Voltage 3Æ 208/240 Vac, 1Æ 180-264 Vac, (47-500Hz) 260-352 Vdc

Power Factor (passive) 0.92 (3 Phase operation)

Inrush Current 30A rms @ 230 Vac

Ride Through Time >20 ms at nominal line, full load

Power Fail >3 ms warning

Conducted EMI (47-63 Hz) EN55022 Level A

Surge Immunity

(Common

Mode and Normal Mode)

Dielectric Withstand

Ouput Characterisitcs

VI-200/VI-J00

Line/Load Regulation

Maxi Line Regulation* 0.20% max to 0.30% max

Maxi Load Regulation* 0.20% max to 0.70% max

VI-200/VI-J00

Setpoint Accuracy*

Maxi Setpoint Accuracy

Ripple and Noise

Output Trim Range

Overcurrent Trip Point

Overvoltage Protection ModuPACs: 115-135%

Efficiency 82% typical

Output Power

4kW MegaPAC

3 Phase MegaPAC

Environmental Characteristics

Storage Temperature -40°C to 85°C

Operating Temperature* -20°C to +45°C full power, -20°C to +65°C half power

Humidity 0 to 95% non-condensing

Altitude

Safety Approvals

Product Weights

Warranty

EN 61000-4-5 Class 3

(Temporary loss of output power may occur which is self recoverable)

Primary to Chassis GND = 2,121 Vdc

Primary to Secondary = 4,242 Vdc

Secondary to Chassis GND = 750 Vdc

0.2% max. from 10% to 100% load;

0.5% max. from 0% to 10% load

1% for standard voltages; 2% for special or adjustable voltages

1% for standard voltages;

2% for special, adjustable voltages and 48 Vdc outputs

Std. outputs: 2% or 100 mV p-p max., whichever is greater, 10% min. load

VXI options: 50 mV p-p <15 Vdc; 150 mV p-p max. for >15V < 24

1% ripple for > 24V;

RAMPAC: 10mV p-p max. or 0.15% whichever is greater

UniPAC: see Vicor module specifications

10% -110% of nominal voltage Maxi modules

50% -110% of nominal voltage VI-200/VI-J00 modules

90% -110% of nominal voltage VI-200/VI-J00 modules 10-15 V

105-125% of full load capability of VI-200/VI-J00 modules

115% typical of full load capability of Maxi modules

4,000W at 45°C (3 Phase); 1,500W at 45°C (1 Phase)

2,000W at 45°C (3 Phase); 1,200W at 45°C (1 Phase)

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 40K

cURus – UL 60950-1, CSA 60950-1

cTUVus – EN 60950-1, UL 60950-1, CSA 60950-1

CE Mark – Low Voltage Directive, 73/23/EEC amended by 93/68/EEC

3 Phase MegaPAC: 18.1lbs (8.21kgs) fully configured

4KW MegaPAC: 21.5lbs (9.77 kgs) fully configured

2 years limited warranty.

See vicorpower.com for complete warranty statement.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 25

Current Share Boards - Optional Feature

"Current sharing" also know as Load Sharing, is the ability to divide the output current
evenly across all active power supplies. This greatly reduces stresses on each power
supply and allows them to run cooler, resulting in higher reliability. Standard "current
sharing" techniques typically utilize shunt resistors or Hall Eect devices to measure
the current from each power supply. Power shunt resistors continually dissipate power
and require cooling especially when dealing with high output currents of >100Amps.
Hall Eect devices measure magnetic fields generated by current flowing through a
conductor and, although they dissipate no power, they tend to be large and expensive.

First developed by Westcor Engineering for paralleling MegaPAC supplies, the Box-to­Box Current Share Board or CSB allows two or more Vicor power supplies to current
share by utilizing the inherent voltage drop produced in the negative output return
cable. This eliminates the need for additional shunt resistors or expensive Hall Eect
devices and provides a simple 5 wire connection method to achieve a +/-1mV accuracy
between the Negative Output power rails. This accuracy translates to a 1% current
sharing if there is a total of 100mV conductional voltage drop in the negative return
path.

Constructed as a current source to drive the Trim pin of a Vicor module, the design
uses an accurate comparator circuit to monitor the power returns. In addition, the
circuit is unidirectional and can only trim an output voltage up. The benefit is that
only the supply that is supporting less current is adjusted up. This action balances the
currents to the load by matching the output voltages of the supplies. In the case of one
supply failing, the circuit will attempt to trim the failed supply only. This will leave the
remaining functional supply alone to provide power to the load at its nominal voltage.
Thus the circuit also oers simple redundancy. In addition, because CSB functions as
a current source, the Trim outputs (T1 and T2) of the CSB can be placed in parallel to
create a summing node. This allows current sharing between more than two supplies by
paralleling the T2 output of one CSB circuit with the T1 output of the next CSB.

Figure 12.

CSB Interconnect Example

Please note: The CSB is not intended for use in Hotswap Applications.

Power Supply 1

24V@1kW

Power Supply 2

24V@1kW

+OUT

+S

TRIM

-S

- OUT

+OUT

+S

TRIM

-S

- OUT

Ye llow

Brown

White

Black

D*

D*

T1

-V1

T2

-V2

CSB02

Power

Red

+VOUT

-VOUT

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 26

Requirements:

1. For proper operation, the power supplies being paralleled should be enabled at the

same time.

2. -Out conductors must be of equal length and wire gauge. Separate -Out conductors
must be used from each supply to the load, or the use of a "Y" connection to a
common point must be used as shown in figure 1. Each leg of the "Y" must have a
minimum of a few millivolts of drop in order for proper operation. 50mV to 100mV
of drop will provide from 5% to 1% accuracy.

3. -V1 and -V2 for all Box-to-Box circuits must be connected directly at the negative
output power studs or terminals to achieve accurate current sharing.

4. D* can be added if redundancy is needed. If redundancy is not required, D* can be
replaced with direct wire connections.

5. When using D*, the Power input should be connected on the cathode side of the
paralleling diodes as shown above.

6. Terminate Sense Leads either locally or remotely as shown in Figure 1.

7. For paralleling more than 2 supplies consult factory for assistance.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 27

Current Share Boards - Optional Feature (Cont.)

Figure 14. Cable Drawing

P1

24.0" +/- 1.0"

Power

T1

-V1

T2

-V2

Red, 22 AWG

Yellow, 22 AWG

Brown, 22 AWG

White, 22 AWG

Black, 22 AWG

12

34

56

1.74"

(44.2mm)

0.12"

(3.0mm)

1.500"

(38.1mm)

0.12"

(3.0mm)

0.900"

(22.9mm)

1.14"

(29.0mm)

0.13" (3.3mm) Dia Non
Plated thru hole 4
places

Molex CT43045F surface mountable
connector. .390" height above board.

Pin Description

1 Power
2T1
3 -V1
4T2
5 -V2
6 No Connection

J1 Pinout

Figure 13. Mechanical Drawing

Specifications:

1. Power: 2-50 Vdc at 5 mA maximum.

2. Accuracy: +/- 1 mV between -Vout connections.

3. Output current when not trimming up: +/- 1 uA (VI-200/J00), +/-5 uA (Maxi).

4. Use 4 non-plated through holes with standos for mounting.

5. CSB01 MUST be used for current sharing VI-200/VI-J00 converters.

6. CSB02 MUST be used for current sharing Maxi converters .

Please note: The CSB is NOT intended for Hotswap Applications

Contact your Regional Applications Engineer at 1-800-927-9474 for additional information.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 28

Low Leakage Version

If Low Leakage is required, the MegaPAC Family of Power Supplies has a model
variant (must be requested). This model enables the user to meet various additional
specifications. Presently, the PFC MegaPAC, Mini MegaPAC and Autoranging MegaPAC
are available in Low Leakage versions. Other models can be made available. The
MegaPAC Family of Power Supplies consist of:

n PFC MegaPAC

n PFC MegaPAC-High Power

n PFC MegaPAC-EL (Low Noise)

n Mini MegaPAC

n Autoranging MegaPAC

n 4 kW MegaPAC

n 4 kW MegaPAC-EL (Low Noise)

The advantage of the Low Leakage MegaPAC power supply is in multiple power supply
systems that have one AC input. This option will lower the input leakage current for
these products to 500mA or less. An additional external EMI filter may be required.

How Low Leakage is obtained

Low Leakage for the MegaPAC Family of power supplies is obtained with the removal
of the "Y" capacitors from within the EMI filter of the MegaPAC as well as the "Y"
capacitors on the input of the ConverterPACs*. This reduces the leakage current from
the AC input to AC ground (chassis) to below 500mA. At the same time, since the "Y"
capacitors are a vital component of the EMI filter, without them, the EMI will go up.
When this happens, the unit will no longer meet Westcor’s published specifications for
conducted EMI. In order to reduce the EMI to within an acceptable limit, an additional
external EMI filter may be required. All safety agency certifications for the MegaPAC
Power Supplies remain intact. Contact Applications Engineering for more information.

Westcor currently has the following ConverterPACs (See ConverterPAC information
sheet and/or Design Guide for more information):

VI-200/VI-J00 Maxi FlexPAC

ModuPAC (M) FinPAC (PZ) FlexPAC (FSS)

JuniorPAC (J) UniPAC (XU)

DualPAC (D) QPAC (XQ)

RamPAC (R) 375 V UniPAC (XT)

BatPAC (B)

QPAC (L)

DualQPAC (LD)

Junior QPAC (LJ)

For RoHS compliant versions a preceeding G is added to the part number.

Please note: The MegaPACs (including the Low Leakage versions) are not UL 2601/60601

compliant or EN60601 compliant.

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 29

NOTES:

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 30

For Vicor Global Office Locations, please go to: http://www.vicorpower.com/contact-us
or call 800-735-6200.

For more information about this or other Vicor products, or for assistance with component-based power
system design, contact the Vicor office nearest you. Vicor's comprehensive line of power solutions includes
modular, high-density DC-DC converters and accessory components, configurable power supplies, and custom
power systems. Westcor, a division of Vicor, designs and builds, configurable power supplies incorporating
Vicor’s high density DC-DC converters and accessory components.

Westcor’s product line includes:

LOPAC FAMILY:

• PFC MicroS

• PFC Micro

• PFC Mini

MEGAPAC FAMILY:

• PFC MegaPAC

• 4kW MegaPAC

• 4kW MegaPAC-EL (Low Noise)

• PFC MegaPAC (High Power)

• PFC MegaPAC (Low Noise/High Power)

• PFC MegaPAC-EL (Low Noise)

• Mini MegaPAC

• Autoranging MegaPAC

• ConverterPACs

OTHERS:

• FlatPAC-EN

• PFC FrontEnd

• MicroPAC

• Conduction Cooled MicroPAC

Rugged COTS versions (MI) are available for the PFC Micro, PFC MicroS, PFC Mini, and PFC MegaPAC.

INFORMATION FURNISHED By VICOR IS BELIEVED TO BE ACCURATE AND RELIABLE. HOWEVER, NO RESPON­SIBILITy IS ASSUMED By VICOR FOR ITS USE. NO LICENSE IS GRANTED By IMPLICATION OR OTHERWISE
UNDER ANy PATENT OR PATENT RIGHTS OF VICOR. VICOR COMPONENTS ARE NOT DESIGNED TO BE USED
IN APPLICATIONS, SUCH AS LIFE SUPPORT SySTEMS, WHEREIN A FAILURE OR MALFUNCTION COULD RESULT
IN INJURy OR DEATH. ALL SALES ARE SUBJECT TO VICOR'S TERMS AND CONDITIONS OF SALE, WHICH ARE
AVAILABLE UPON REqUEST.

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. THE LATEST DATA IS AVAILABLE ON THE
VICOR WEBSITE AT VICORPOWER.COM

The Power Behind Performance

Rev 1.2 01/2014 P/N 07-040831-01A vicorpower.com Applications Engineering: 800 927.9474 Page 31