Page 5 of 6 Rev 1
February 3, 2020
DRB-480 Handbook
DDA Series Instruction Manual
For
DDA325N-D2PN-1212-001
(Dual Output with one (1) Negative Rail)
0
2
4
6
8
10
12
14
16
25
45
65
85
105
125
O
ut
pu
t
C
ur
re
nt
(
A
)
Ambient Temperature (°C)
24V
5V
0
2
4
6
8
10
12
14
16
0
1
2
3
4
5
6
7
O
u
tp
u
t
C
u
rr
e
n
t
1
Output Current 2
Ta=60
Ta=70
Typical output current vs. ambient temperature derating per
indicated output voltage setpoints at Vin = 24V.
Combined Output current derating example for Vo1 = 12V;
Vo2 = -12V at Vin = 15V.
0
2
4
6
8
10
12
14
16
0
2
4
6
8
O
u
tp
u
t
Cu
rr
en
t
1
Output Current 2
Ta=70
Ta=80
0
2
4
6
8
10
12
14
16
0
1
2
3
4
O
u
tp
u
t
C
u
rr
en
t
1
Output Current 2
Ta=60
Ta=70
Ta=80
Combined Output current derating example for Vo1 = 5V; Vo2
= -5V at Vin = 24V.
Combined Output current derating example for Vo1 = 18V;
Vo2 = -24V at Vin = 24V.
5. Orientation
5-1. Orientation
The power supply must be orientated vertically with input lowest.
Leave space around the unit to ventilate heat efficiently.
6. Internal Fuse Rating
Single or Dual internal fuse based on number of outputs; Littelfuse 0463025.ER 25A / 100VDC or equivalent.
7. Power supply mounting on DIN RAIL (TS35 or equivalent)
Make sure the input and output wiring is disconnected prior to mounting the power supply onto the din rail
8. Before concluding that the unit is faulty
Before concluding that the unit is faulty, make the following checks.
Check if the rated input voltage is connected.
Check if the wiring of input and output is correct.
Check if the wire material is not too thin.
Check if the output voltage control (VO_ADJ) is properly adjusted.
Check if the output current and output wattage do not exceed the specification.
Audible noise can be heard during Dynamic-Load operation.
