Page 8
DPP1U SERIES
OPERATING MANUAL
P O W E R I N G T E C H N O L O G Y
Document Number: DPP1U-MAN Rev. 7
dpp1u-man-Rev7-0422.indd
8.0 FRONT PANEL DESCRIPTION
The front panel of the DPP1U, 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 8 field installable/replaceable hydraulic
magnetic circuit breakers rated from 1A to 30A. 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.
ALM B ALM A
BAT
BAT
RTN
RTN
NO-C-NC
NO-C-NC
BAT
RTN
BAT
RTN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
150A MAX PER BUS
150A MAX PER BUS
A
B
ALARM
1
1
8
8
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
17.12 (434.9)
1.74
(44.2)
Alarm
Contacts
Alarm LEDs
B Input
¼-20 Studs
REAR VIEW
FRONT VIEW
Case depth: 8.94 (227.1)
Ground
8-32 Stud
A Side Breakers
B Side Breakers
A Outputs
6-32 Terminal Strip
B Outputs
6-32 Terminal Strip
A Input
¼-20 Studs
2.28
(57.8)
Clear Perspex
Safety Cover
ALM B ALM A
BAT
BAT
RTN
RTN
NO-C-NC
NO-C-NC
BAT
RTN
BAT
RTN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
NEG
POS
NEG
POS
POS
NEG
POS
NEG
NEG
POS
NEG
POS
POS
NEG
POS
NEG
Figure 3. Front Panel View
9.0 BACK PANEL DESCRIPTION
9.1
Back View
. Figure 4 shows the back of the DPU1U 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 side A outputs 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.
ALM B ALM A
BAT
BAT
RTN
RTN
NO-C-NC
NO-C-NC
BAT
RTN
BAT
RTN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
150A MAX PER BUS
150A MAX PER BUS
A
B
ALARM
1
1
8
8
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
ON
I
O
OFF
17.12 (434.9)
1.74
(44.2)
Alarm
Contacts
Alarm LEDs
B Input
¼-20 Studs
REAR VIEW
FRONT VIEW
Case depth: 8.94 (227.1)
Ground
8-32 Stud
A Side Breakers
B Side Breakers
A Outputs
6-32 Terminal Strip
B Outputs
6-32 Terminal Strip
A Input
¼-20 Studs
2.28
(57.8)
Clear Perspex
Safety Cover
ALM B ALM A
BAT
BAT
RTN
RTN
NO-C-NC
NO-C-NC
BAT
RTN
BAT
RTN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
NEG
POS
NEG
POS
POS
NEG
POS
NEG
NEG
POS
NEG
POS
POS
NEG
POS
NEG
Figure 4. Back Panel View
9.2
Input Connections
. See Figure 5. The DC power inputs to the distribution panels are made
by means of crimp type lugs or direct connection to ¼-20 studs to two copper bus bars on
side A and side B. The upper bus bar is the battery connection (w or -) and the
lower bus bar is the return (w or -).
0.625”
1.48”
0.5”
0.34”
0.375”
0.65”
0.32”
Figure 5. Input Bus Bar Detail
Positive Return
-48V/-24V, -12V
Negative Return
+24V/+48V, +12V
