Unipower DPP2U Series User manual

OPERATING MANUAL
DPP2U SERIES
DC POWER DISTRIBUTION PANELS
Manual No. DPP2U-MAN Rev. 5
UNIPOWER, LLC
65 Industrial Park Rd
Dunlap, TN 37327
Phone: [phone]
Toll Free: 1-800-440-3504
Web site: www.unipowerco.com
© 2019 UNIPOWER LLC
All Rights Reserved
POWERING TECHNOLOGY

Page 2
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
Contents
1.0 INTRODUCTION ...............................................................................................................4
2.0 FEATURES..........................................................................................................................4
3.0 PRODUCT LINE.................................................................................................................5
4.0 SAFETY & INDUSTRY STANDARDS.............................................................................6
5.0 WARRANTY (summary) ....................................................................................................6
6.0 DESCRIPTION OF OPERATION......................................................................................7
7.0 SPECIFICATIONS..............................................................................................................8
8.0 FRONT PANEL DESCRIPTION........................................................................................8
9.0 BACK PANEL DESCRIPTION..........................................................................................9
10.0 UNPACKING AND INSPECTION...................................................................................13
11.0 INSTALLATION...............................................................................................................14
13.0 SETUPAND TESTING ....................................................................................................18
REV DESCRIPTION CHK’d & APPR’d / DATE
5 PCO# 45395 MM / 07-31-19

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
FIGURES
Figure 1. DPP2U DC Power Distribution Panel ...........................................................................4
Figure 2. Block Diagram...............................................................................................................7
Figure 3. Front Panel View............................................................................................................8
Figure 4. Back Panel View............................................................................................................9
Figure 5. Input Bus Bar Detail ......................................................................................................9
Figure 6. Output Barrier Strip Detail...........................................................................................10
Figure 7. Alarm Connection Detail.............................................................................................11
Figure 8. Form-C Relay Schematic.............................................................................................11
Figure 9. Chassis Ground Connection.........................................................................................12
Figure 10. Series Connection of Multiple Panels..........................................................................14

Page 4
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
OPERATING MANUAL
DPP2U SERIES DC POWER DISTRIBUTION PANELS
1.0 INTRODUCTION
DPP2U Series circuit breaker panels provide distribution and overload protection for 1 to
20 circuits with circuit breakers that can be eld installed/exchanged using a supplied puller
tool. The panels are only two mounting positions (3.5 inches) high.
The panels provide up to 20 breakers single bus 450Aor 10A+10B 450A+450Adistribution
and alarm capabilities. The A and B sections of the dual-bus panel are fully isolated, can
be separately congured for 12 or 24/48 volts and are polarity neutral. Breaker capacities
range from 2.5 to 200 amperes.
Breaker alarm is indicated by a dual color LED (green/red) and Form C relay contacts for
each bus
.
Figure 1. DPP2U DC Power Distribution Panel
2.0 FEATURES
 48/24V and 12V or Dual Voltage  Tapered entry for easy insertion
 POLARITY NEUTRAL  NO or NC alarm contacts
 450A bus bar inputs  Alarm LEDs
 Single or Dual Feed  Power Fail form-C alarm
 Rear panel safety cover standard  19" & 23" mounting brackets

Page 5
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
3.0 PRODUCT LINE
3.1 Congurations
The following table lists the 5 available congurations of the DPP2U series.
STANDARD DUAL FEED CONFIGURATIONS
MODEL
NUMBER VOLTS EACH FEED INPUT FEEDS MAX. # BREAKERS AMPS EACH FEED TOTAL AMPS
DPP2U-A1-B1 48/24 - 48/24 210 A side
&
10 B side 450 900DPP2U-A6-B6 12 - 12
DPP2U-A1-B6 48/24 - 12
OPTIONAL SINGLE FEED CONFIGURATIONS
MODEL
NUMBER VOLTS EACH FEED INPUT FEEDS MAX. # BREAKERS AMPS EACH FEED TOTAL AMPS
DPP2U-A1-B1-S 48/24 1 20 450 450
DPP2U-A6-B6-S 12
3.2 AvailableBreakers 1
AMPS PART NUMBER AMPS PART NUMBER
2.5 348-1441-0020 50 348-1441-0500
5 348-1441-0050 60 348-1441-0600
10 348-1441-0100 80 348-1441-0800
15 348-1441-0150 100 348-1441-1000
20 348-1441-0200 1252 775-1524-0000
25 348-1441-0250 1502 775-1524-0010
30 348-1441-0300 2002 775-1524-0020
40 348-1441-0400
NOTES:
1. Breakers need to be ordered individually and are shipped separately.
2. Require two positions. Includes paralleling bars to connect output load terminals.
3. Breakersaremagnetic-hydraulicplug-intypewithauxiliarycontacts(NormallyOpen)andmid-trip
function. Only the following types may be installed.
2.5A to 100A:
CBI D-Frame Series single pole,
D-2A23XANBSXXXXLXB-XXXXXWDVAX2-X
or
Carling C-Series Handle single pole, CT1-B2-14-XXX-A11-MJ
125A to 200A:
CBI D-Frame Series, parallel pole, D-2A23XBNBSXXXXLAM-XXXXXWDVAX3-X
or
Carling C-Series Handle Parallel pole, CT2-P2-04-XXX-A11-MK

Page 6
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
4.0 SAFETY & INDUSTRY STANDARDS
4.1 DPP2U Series power distribution panels meet the following safety
requirements:
STANDARD
UL60950-1, 2nd Edition
CSA22.2 No. 60950-1, 2nd Edition
EN60950-1, 2nd Edition
4.2 DPP2U Series power distribution panels are CE marked to indicate
conformance to the European Union’s Low Voltage Directive.
4.3 These Distribution Panels operate at voltages that could potentially be
hazardous. Furthermore, inadvertent short circuiting of the system battery
and/or rectier by mis-connection or other error could be harmful. This
product should be handled, tested and installed only by qualied technical
persons who are trained in the use of power systems and are well aware of
the hazards involved.
4.4 When operating this Distribution Panels the chassis ground terminal must
be connected to the system frame ground or other proper safety ground for
the protection of personnel.
4.5 All connections to the Distribution Panels should be carefully checked for
errors before applying power to them.
4.6 The internal voltages may be at hazardous potentials. The top cover should
not be removed. There are no user-serviceable components in these units.
Removing the top cover will void the warranty.
5.0 WARRANTY(summary)
DPP2U Seriespower distributionpanels arewarranted fortwo(2) yearsfrom dateof shipment
against defects in material and workmanship. This warranty does not extend to products
which have been opened, altered or repaired by persons other than persons authorized by
the manufacturer or to products which become defective due to acts of God, negligence or
the failure of customer to fully follow instructions with respect to installation, application
or maintenance.
For a complete text of UNIPOWER’s warranty conditions please request a copy from your
local Sales Oce.

Page 7
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
6.0 DESCRIPTION OF OPERATION
6.1 Power Distribution Circuits. A simplified schematic diagram of the
distribution panels is shown in Figure 2. The battery input to each load
connects to a high-current copper bus bar from which the individual fuses or
circuit breakers distribute power to the loads. The return input connects to a
similarbus bar towhich the individualloads terminate. TheAand Bloads are
totally independent and isolated with the exception of models incorporating
the ‘S’ option.
CIRCUIT
BREAKERS
BATT.
BATT.
INPUT
RET.
INPUT
RET.
HI-CURRENT BUS BAR HI-CURRENT BUS BAR
HI-CURRENT BUS BAR HI-CURRENT BUS BAR
LOADS LOADS
1 2 3... N
A SIDE
ALARM
CIRCUITS
B SIDE
ALARM
CIRCUITS
A SIDE B SIDE
-S OPTION
-S OPTION
1 2 3... N
Figure 2. Block Diagram
6.2 AlarmCircuits. The alarm circuits detect a tripped circuit breaker and, in
this event, turn on the red part of the LEDs. The alarm circuits also each
drive Form C relay contacts. If one or more circuits open or if there is an
input power failure, the relays are de-energized and the contacts are used
to control external audible or visual alarms. The A and B alarm circuits are
also independent and isolated from each other.
LED & RELAY STATE MEANINGS
LED State RelayState Meaning
Green Energized (N.O. is closed) OK
Red De-energized
(N.O. is open) Breaker Trip
OFF No Input Power

Page 8
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
7.0 SPECIFICATIONS
The following specications are typical at 25°C unless otherwise noted.
INPUT/OUTPUT
Panel Capacity
@35°C..............................................................................450A per Bus
@40°C..............................................................................400A per Bus
@50°C..............................................................................320A per Bus
@70°C..............................................................................200A per Bus
Conguration ..................................450A Single Bus with 1 to 20 Breakers
900A Dual Bus 1 to 10 Breakers Each Bus
Breaker Capacity 1................................................................. 2.5A to 200A
Voltage 1
24/48V Version......................................................................21-60VDC
12V Version........................................................................10.5-15VDC
Polarity ............................................Neutral, Positive or Negative Ground
ALARMS
Alarm Indicator ....................................................Dual Color LED Per Bus
LED Status Indication........................................................Green = Normal
Red = CB Trip Alarm
O󰀨 = No Power
Alarm Relays.............................................. Form C Contacts for each Bus
SAFETY.................... UL60950-1 2nd Ed., CSA22.2 No. 60950-1 2nd Ed.,
EN60950-1 2nd Ed.
ENVIRONMENTAL
Operating Temp. Range ..................................................... -10°C to +70°C
Storage Temp. Range........................................................ -40°C to + 85°C
Humidity........................................................ 0% to 95%, Non-Condensing
PHYSICAL SPECIFICATIONS
Case Material ......................................................................................Steel
Finish............................................................................Powder Coat Black
Case Dimensions, Inches (mm) ........................3.45 H x 17.16 W x 5.98 D
(87.6 x 435.9 x 151.9
Weight (approx.)........................................................... 12.5 lbs. (5.67 kg.)
Rack Mounting...................................................................... 19 or 23 Inch
CONNECTIONS
Input Connections...........................................................................Bus Bar
Output Connections...............................................1/4-20 Stud, 2-hole lugs
Chassis Ground Connection..................................1/4-20 Stud, 2-hole lugs
Alarm Relay Connections...................Spring Clamp Terminals,16-26AWG
Notes:
1. See ordering guide to specify.
8.0 FRONT PANEL DESCRIPTION
The front panel of the DPP2U, shown in Figure 3 below, consists of the A and B
sides and a center section. The A and B sides can each accommodate up to 10 eld
installed/replaceable hydraulic magnetic circuit breakers rated from 2.5A to 200A.
The center section has two green/red LEDs, one for the A side (left) and the other
for the B side (right). At the bottom of this center section is a slot for a wallet and
designator card. This card permits the recording of each output circuit by number.
A - ALM B - ALM
123456789 10
A BUS - 450A MAX/100A MAX PER CB
123456789 10
B BUS - 450A MAX/100A MAX PER CB
NO-C-NC NO-C-NC
ALM-B
ALM-A
NO-C-NC NO-C-NC
1098765432 1
0.63
(16.0)
0.76
(19.3)
0.42
(10.7)
0.25
(6.4)
1/4-20 stud
length = 0.50 (12.7),
0.625 (15.88) spacing
1/4-20 stud
length = 0.38 (9.7),
0.625 (15.88) spacing
0.57
(14.5)
0.37
(9.4)
0.90
(22.9)
ø 0.306 (7.8)
0.49 (12.5) x
0.31 (7.9) slot
3.50
(88.9)
1.25
(31.8)
5.98
(151.9)
0.60
(15.2)
17.16
(435.9)
0.76
(19.3)
1.725
(43.82)
0.56
(14.2)
0.21
(5.3)
1.13
(28.7) 0.22
(5.6)
3.45
(87.6)
A - BUS OUTPUT FEEDB - BUS OUTPUT FEED
A - BUS RETURNB - BUS RETURN
B - BUS FEED BREAKERS
A - BUS FEED BREAKERS
Alarm connector
Chassis GND
(1/4-20 THREAD)
A - BUS INPUT
FEED
B - BUS INPUT
FEED
1098765432 1
Shorting Bus (-S Models)
OUTLINE OF SAFETY COVER
(blue dotted line)
4.60
(116.8)
0.625
(15.88)
0.500
(12.70)
0.750
(19.05)
4.642
(117.91)
Figure 3. Front Panel View

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
9.0 BACK PANEL DESCRIPTION
9.1 Back View. Figure 4 shows the back of the DPP2U distribution panel. Inputs are at
the left and right ends of the back panel. Side B outputs are at two rows of barrier
terminal strips on the left side, and sideAoutputs are the same on the right side. At
the center of the back panel are two spring clamp terminal blocks for the Form C
relay contact outputs.
Below these is a chassis ground terminal.
A - ALM B - ALM
123456789 10
A BUS - 450A MAX/100A MAX PER CB
123456789 10
B BUS - 450A MAX/100A MAX PER CB
NO-C-NC NO-C-NC
ALM-B
ALM-A
NO-C-NC NO-C-NC
1098765432 1
0.63
(16.0)
0.76
(19.3)
0.42
(10.7)
0.25
(6.4)
1/4-20 stud
length = 0.50 (12.7),
0.625 (15.88) spacing
1/4-20 stud
length = 0.38 (9.7),
0.625 (15.88) spacing
0.57
(14.5)
0.37
(9.4)
0.90
(22.9)
ø 0.306 (7.8)
0.49 (12.5) x
0.31 (7.9) slot
3.50
(88.9)
1.25
(31.8)
5.98
(151.9)
0.60
(15.2)
17.16
(435.9)
0.76
(19.3)
1.725
(43.82)
0.56
(14.2)
0.21
(5.3)
1.13
(28.7) 0.22
(5.6)
3.45
(87.6)
A - BUS OUTPUT FEEDB - BUS OUTPUT FEED
A - BUS RETURNB - BUS RETURN
B - BUS FEED BREAKERS
A - BUS FEED BREAKERS
Alarm connector
Chassis GND
(1/4-20 THREAD)
A - BUS INPUT
FEED
B - BUS INPUT
FEED
1098765432 1
Shorting Bus (-S Models)
OUTLINE OF SAFETY COVER
(blue dotted line)
4.60
(116.8)
0.625
(15.88)
0.500
(12.70)
0.750
(19.05)
4.642
(117.91)
Figure 4. Back Panel View
9.2 Input Connections. See Figure 5. The DC power inputs to the distribution panel
are made by means of crimp type lugs to two copper bus bars on sideA and side B.
The upper bus bar is the battery connection (whether + or -) and the lower bus bar
is the return (whether + or -).
0.37
(9.4)
0.90
(22.9)
ø
0.306 (7.8)
0.49 (12.5) x 0.31 (7.9) slot
0.76
(19.3)
1.12
(28.4)
0.56
(14.2)
1.13
(28.7)
Figure 5. Input Bus Bar Detail

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
9.3 Recommended Input Cable Sizes and Lugs
The following table details the recommended cable size for various input current.
MAXIMUM
CURRENT CONDUCTOR SIZE PANDUIT CORP. PART NUMBER TORQUE 1/4 x 20 BOLT
450A 350KCMIL LCC350-14BW-X 62 in-lbs
400A 300KCMIL LCCX250-14B-X 62 in-lbs
320A 4/0 AWG LCCX4/0-14B-X 62 in-lbs
200A 3/0 AWG LCCX3/0-14B-X 62 in-lbs
150A 1/0 AWG LCCX1/0-14B-X 62 in-lbs
9.4 Output Connections. Output connections forAand B loads are shown in Figure 4.
There are 10 sets of bus bar terminals for each side, A and B. The connections are
numbered to correspond with the numbers of the front panel breakers. The upper
strip connections are from the battery (FEED) through the breakers; the lower strip
connections are the RETURNS. Side B is on the left and side A on the right when
viewed from the rear.
All connections use 1/4-20 threaded studs and are rated up to 100 amperes. Maximum
wiresize is2AWG. UNIPOWER recommendsusing FLEXwire witheitherPanduit
LCDXN2-14A-E or LCDXN2-14AF-E (90deg angle) lugs. When 125A, 150A or
200Abreakers are installed two positions are utilized. Figure 6 below shows detailed
spacing of the terminals.
A - ALM B - ALM
123456789 10
A BUS - 450A MAX/100A MAX PER CB
123456789 10
B BUS - 450A MAX/100A MAX PER CB
NO-C-NC NO-C-NC
ALM-B
ALM-A
NO-C-NC NO-C-NC
1098765432 1
0.63
(16.0)
0.76
(19.3)
0.42
(10.7)
0.25
(6.4)
1/4-20 stud
length = 0.50 (12.7),
0.625 (15.88) spacing
1/4-20 stud
length = 0.38 (9.7),
0.625 (15.88) spacing
0.57
(14.5)
0.37
(9.4)
0.90
(22.9)
ø 0.306 (7.8)
0.49 (12.5) x
0.31 (7.9) slot
3.50
(88.9)
1.25
(31.8)
5.98
(151.9)
0.60
(15.2)
17.16
(435.9)
0.76
(19.3)
1.725
(43.82)
0.56
(14.2)
0.21
(5.3)
1.13
(28.7) 0.22
(5.6)
3.45
(87.6)
A - BUS OUTPUT FEEDB - BUS OUTPUT FEED
A - BUS RETURNB - BUS RETURN
B - BUS FEED BREAKERS
A - BUS FEED BREAKERS
Alarm connector
Chassis GND
(1/4-20 THREAD)
A - BUS INPUT
FEED
B - BUS INPUT
FEED
1098765432 1
Shorting Bus (-S Models)
OUTLINE OF SAFETY COVER
(blue dotted line)
4.60
(116.8)
0.625
(15.88)
0.500
(12.70)
0.750
(19.05)
4.642
(117.91)
Figure 6. Output Barrier Strip Detail
The following table lists a range of cable sizes with matching lugs that will t the
output terminals. The indicated current rating is the maximum assuming that the
cables are bundled/conned.

Page 11
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
MAXIMUM
CURRENT CONDUCTOR SIZE PANDUIT CORP. PART NUMBER TORQUE 1/4 x 20 BOLT
200A (2 pos) 3/0 AWG LCDX3/0-14A-X 62 in-lbs
150A (2 pos) 1/0 AWG LCDX1/0-14A-X 62 in-lbs
125A (2 pos) 1 AWG LCDX1-14A-X 62 in-lbs
100A (1 pos) 2 AWG LCDXN2-14A-E 62 in-lbs
80A (1 pos) 4 AWG LCDX4-14A-L 62 in-lbs
60A (1 pos) 6 AWG LCDX6-14A-L 62 in-lbs
50A (1 pos) 8 AWG LCDX8-14A-L 62 in-lbs
9.5 Form C Relay Contact Outputs. The center of the back panel has connections to
the Form C relay contact outputs for connection to external audible or visual alarm
circuits. See Figure 7 below.
ALM-B
ALM-A
NO-C-NC NO-C-NC
Figure 7. Alarm Connection Detail
Connection is made via two Phoenix Contact spring clamp terminal blocks. J3 is for
the Form C relay contact of side B and J4 is for the Form C relay contact of side B.
Terminals 1, 2 and 3 viewed from left to right are the normally open (NO) common
(C) and normally closed (NC) contacts, respectively. See gure 8 below.
“Normally Closed” and “Normally Open” are dened with the distribution panel
powered and providing power to all outputs, i.e., no circuit breakers tripped.
The ratings of the relay contacts are 0.6Aat 125VAC or 2Aat 30VDC. The spring
clamp terminals accept wire sizes nos. 16 to 26 AWG.
When the input power is connected to a side (Aor B), the Form C relay of that side is
energized. If there is either loss of input power, one or more circuit breakers trip or
the relay is de-energized, the normally open contacts close and the normally closed
contacts open. See gure 8 below.
RELAY
C
ONTACTS
OUTPUTS
NC
C
NO
Figure 8. Form-C Relay Schematic

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
9.6 ChassisGround Connection.This is located on the left side of the chassis as shown
in gure 9 below and is a pair of 1/4-20 bolts.
A - ALM B - ALM
123456789 10
A BUS - 450A MAX/100A MAX PER CB
123456789 10
B BUS - 450A MAX/100A MAX PER CB
NO-C-NC NO-C-NC
ALM-B
ALM-A
NO-C-NC NO-C-NC
1098765432 1
0.63
(16.0)
0.76
(19.3)
0.42
(10.7)
0.25
(6.4)
1/4-20 stud
length = 0.50 (12.7),
0.625 (15.88) spacing
1/4-20 stud
length = 0.38 (9.7),
0.625 (15.88) spacing
0.57
(14.5)
0.37
(9.4)
0.90
(22.9)
ø 0.306 (7.8)
0.49 (12.5) x
0.31 (7.9) slot
3.50
(88.9)
1.25
(31.8)
5.98
(151.9)
0.60
(15.2)
17.16
(435.9)
0.76
(19.3)
1.725
(43.82)
0.56
(14.2)
0.21
(5.3)
1.13
(28.7) 0.22
(5.6)
3.45
(87.6)
A - BUS OUTPUT FEEDB - BUS OUTPUT FEED
A - BUS RETURNB - BUS RETURN
B - BUS FEED BREAKERS
A - BUS FEED BREAKERS
Alarm connector
Chassis GND
(1/4-20 THREAD)
A - BUS INPUT
FEED
B - BUS INPUT
FEED
1098765432 1
Shorting Bus (-S Models)
OUTLINE OF SAFETY COVER
(blue dotted line)
4.60
(116.8)
0.625
(15.88)
0.500
(12.70)
0.750
(19.05)
4.642
(117.91)
Figure 9. Chassis Ground Connection
The recommended cable size for this connection is 2/0 AWG terminated with a
Panduit LCDN2/0-14A-X or equivalent lug. Torque bolts to 62 in-lbs.
NOTE THAT IT IS ESSENTIAL THAT THIS TERMINAL IS CONNECTED TO
THE SYSTEM FRAME GROUND TO ENSURE SAFE OPERATION.

Page 13
DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
10.0 UNPACKING AND INSPECTION
10.1 This DPP2U Series power distribution panel was carefully tested, inspected and
packaged for shipment from our factory. The unit and circuit breakers are shipped
separately. Upon receipt of the unit it should be carefully unpacked and inspected
for any damage in shipment.
10.2 If there is evidence of damage, do not attempt to test the unit. The freight carrier
should be notied immediately and a claim for the cost of the rectier system should
be led with the carrier for direct reimbursement. Be sure to include the model and
serial number of the damaged unit in all correspondence with the freight carrier.
Also save the shipping carton and packing material as evidence of damage for the
freight carrier’s inspection.
10.3 UNIPOWER will cooperate fully in case of any shipping damage investigation.
10.4 Always save the packing materials for later use in shipping the unit. Never ship the
unit without proper packing.

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
11.0 INSTALLATION
11.1 Mounting. This distribution panel can be mounted in either 19- or 23-inch racks by
using the supplied reversible brackets. Mount it from the front of the rack using the
correct osets to align with existing rack-mounted equipment. The bracket osets
are every quarter inch from front to back.
Aminimum air clearance of 1.5” above and below the unit must be maintained after
installation in the rack. Care should be taken not to compromise the stability of the
rack by the installation of this unit.
11.2 Connections. Input connections should be made with two-terminal crimp type lugs.
See Sections 9.2 and 9.3.
Connection to Supply
a) Connect to a reliably grounded 12VDC to 48VDC SELV source.
b) The branch circuit over-current protection shall be sized appropriate to the input
current and shall not exceed 600A.
c) Use minimum 350Kmcm copper conductors for max. rated input current.
d) A readily accessible disconnect device that is suitably approved and rated is
recommended to be incorporated in the eld wiring.
e) To be installed in a Restricted Access Location.
NOTE: Single feed models DPP2U-A1-B1-S and DPP2U-A6-B6-S have both left
and right side input bus bars tted. It is only necessary to connect the input feed to
one side for correct operation.
The unused side is directly connected to the live input feed and can be used for
supplying additional panels. See gure 10 below.
CAUTION: The total load must not exceed 450A on any one pair of bus bars in the
chain.
450A MAX. FEED
RETURN
Figure 10. Series Connection of Multiple Panels
Output connections are made to individual output bus bars and common return. See
Section 9.4 and Figure 6.

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Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
The Form C relay contact output connections are made to the spring clamp terminal
blocks. See Section 9.5. The chassis ground connection is made to the 1/4-20 studs.
See Section 9.6. This safety ground connection should be made before operating
the panel.
11.3 Checking Connections. Carefully check the polarity of input connections to the
distribution panel and output connections to the load before operating the panel.
Reverse connections will not harm the distribution panel which is POLARITY
NEUTRAL but may cause serious harm to the load. Check to make sure that the
chassis safety ground connection is made. Make sure that all connections are clean
and secure to minimize contact resistance.
11.4 Rear Safety Cover. Once all of the above have been completed, t the clear plastic
safety cover to the back of the unit using the supplied mounting studs and screws.
Instruction for tting the mounting studs the panel are included in the accessory kit.

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
12.0 INSTALLING CIRCUIT BREAKERS
The DPP2U Series employs pluggable circuit breakers that can be easily installed, removed
or replaced using the supplied puller tools. This operation is carried out without the need
to dismount the unit from it’s installation.
Installation, removal or replacement of a circuit breaker and connection or disconnection
of a load circuit should be carried out only by only by qualied technical persons who are
trained in the use of power systems and are well aware of the hazards involved.
Although it may be necessary on some occasions to carry out this operation while power
remains applied to the panel, it is always preferable to switch o the power if possible
before proceeding.
12.1 Removingthe coverplate. To remove the coverplate undo thetwo knurledretaining
screws at the left and right side of the unit and pull forward.
12.2 Removing a breaker or blanking panel. To remove a breaker pull the toggle
switch handle using the supplied puller tool until the breaker comes free. To remove
a blanking panel lever it out at the top or bottom using a at bladed screwdriver.
12.3 Installing a breakerorblank panel. To insert a breaker carefully push the breaker
rmly into the socket and make sure that it is fully seated. To t a blanking panel
use the two supplied retaining screws to t it into position.
Repeat the above procedure from 12.2 to 12.3 for all positions and then replace the
cover plate.
12.4 Conditions forbreakerpositioning. For thermal reasons, when operating the panel
continuously at the current ratings stated in note (2) on page 15, the circuit breaker
current shall not exceed the continuous rating as dened in the table.
Adjoining gaps on each side of the circuit breaker must be provided for current
ratings 70A to 200A. None are required for 2.5A to 60A.

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
Circuit Breaker Gap Requirements
CBCurrent
Rating
Number
Poles Max.Continuous Load AdjoiningGap (eachside)
2.5A to 60A 1 80% of CB rating
(70% @ 70°C) NO
70A to 100A 1 75% of CB rating
(50% @ 70°C) YES
125A to 200A 2 62.5% of CB rating
(37.5% @ 70°C) YES
The above table is based on the following:
1) Use of Carling (C Series) breakers or CBI (D Frame) breakers. Breakers in these
series are equivalent in t, form, and function and can be used interchangeably
within the same system.
2) The DPP2U panel is rated for continuous operation at a maximum input of 450A
per side @ 35C max., 400A per side @ 40C max., 320A per side @ 50C max.,
and 200A per side @ 70C max.
12.5 Connecting or disconnecting load circuits. In cases where a breaker has been
installed follow the instructions in section 9.4 to connect the new output wiring.
Ensure that the breaker is in the OFF position until all connections have been made
and thoroughly checked.
Remember that if any 125A, 150A or 200A breakers have been tted these will
require that the supplied link bar is tted across the associated output bus bars.
Note that if power remains applied to the panel during breakerinstallation the
alarm LED will show red and the alarm relay will be activated until the new
cables have been connected and the breaker set to the ON position.

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
13.0 SETUP AND TESTING
13.1 It is not necessary to have the distribution panel mounted in a rack for initial testing.
This can be done on a bench. It is also not necessary to have loads connected to the
panel for this testing.
13.2 With the input power source o, connect the input wires to the A side of the
distribution panel. Connect ground to the chassis ground terminal. Set all circuit
breakers to on.
13.3 Turn on the input power source. The A side LED should be green. If it is red, one
of the circuit breaker is tripped. If the LED is o, there is no input power to the unit.
Check the output voltage at each set of output terminals with a digital voltmeter.
13.4 With the A side LED green, use an ohmmeter to check the Form C relay contact
outputs. On J4 measure the resistance between pins 1 and 2. This should read
“open”. Measure the resistance between pins 2 and 3. This should read “short”.
13.5 On the A side trip circuit breaker no. 1. The A side LED should turn red. On J4
measure the resistance between pins 1 and 2. This should read “short”. Measure the
resistance between pins 2 and 3. This should read “open”. Reset the circuit breaker.
13.6 On theAside check each succeeding breaker by tripping it, and verify that the LED
turns red. It is not necessary to recheck the Form C relay contacts.
13.7 Repeat the same tests of Sections 13.2 through 13.6 on the B side of the distribution
panel, use J3 to check the Form-C relay operation.
13.8 The distribution panel may now be connected to its intended application.
13.9 If the distribution panel did not operate properly in the above tests, go back and
double check the connections and the polarity of the input source to make sure it is
correct.
Please note that there are no user serviceable parts inside either the modules or the shelves
and that opening either will void the warranty.

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DPP2U SERIES
OPERATING MANUAL
POWERING TECHNOLOGY
Manual No. DPP2U-MAN Rev. 5 dpp2u-man-rev5-0719.indd
This document is believed to be correct at time of publication and UNIPOWER LLC accepts no responsibility for
consequences from printing errors or inaccuracies. Specications are subject to change without notice.
Product support can be obtained using the following addresses and telephone numbers.
Corporate oce:
UNIPOWER, LLC
210 N University Dr
Coral Springs, FL 33071
United States
Manufacturing facility:
UNIPOWER, LLC
65 Industrial Park Rd
Dunlap, TN 37327
United States
Manufacturing facility:
UNIPOWER Slovakia SRO
ZLATOVSKA 1279
Business Center 22
91105 Trencin, Slovakia
Phone: [phone]
Toll Free: 1-800-440-3504
Web site – www.unipowerco.com
When contacting UNIPOWER, please be prepared to provide:
1. The product model number, spec number, S build number, and serial number
- see the equipment nameplate on the front panel
2. Your company’s name and address
3. Your name and title
4. The reason for the contact
5. If there is a problem with product operation:
• Is the problem intermittent or continuous?
• What revision is the rmware?
• What actions were being performed prior to the appearance of the problem?
• What actions have been taken since the problem occurred?