H Series Data Sheet
50 Watt DC-DC Cassette Converters
Features
Wide input voltage ranges up to 60 VDC
1, 2, or 3 outputs up to 48 VDC
Class I equipment
• Wide input voltage range suitable for battery operation
• Efficient input filter and built-in surge and transient
suppression circuitry
• Outputs individually isolated
• Outputs fully protected against overload
111
4.37"
3U
39
1.54"
8TE
168
6.6"
Safety according to IEC/EN 60950
Description
The H series of DC-DC converters represents a broad and
flexible range of cassette power supplies for use in
advanced electronic systems. Features include high
efficiency, reliability, and reasonable output voltage noise.
The converter inputs are protected against surges and
transients occuring at the source lines. Input over- and
undervoltage cut-out circuitry disables the outputs if the
input voltage is outside the specified range.
All outputs are open- and short-circuit proof and are
protected against overvoltages by means of built-in
suppressor diodes. The outputs can be inhibited by a logic
signal applied to the connector pin 2 (i). If the inhibit
function is not used, pin 2 should be connected to pin 23 to
enable the outputs.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Full input-to-output, input-to-case, output-to-case, and
output-to-output isolation is provided. The converters are
designed and built according to the international safety
standard IEC/EN 60950 and have been approved by the
safety agencies TÜV and UL (USA and Canada).
The case design allows operation at nominal load up to
50 °C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 50 °C, but
the case temperature should remain below 80 °C under all
conditions.
A temperature sensor generates an inhibit signal which
disables the outputs if the case temperature
T
C
exceeds the
limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
Various options are available to adapt the converters to
individual applications.
The converters may either be plugged into 19-inch rack
systems according to DIN 41494, or be chassis mounted.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ............................ 10
Mechanical Data ............................................................ 11
Immunity to Environmental Conditions ........................... 12
Safety and Installation Instructions ................................ 12
Description of Options .................................................... 15
Accessories .................................................................... 19
Description ....................................................................... 1
Model Selection ............................................................... 2
Part Number Description and Product Marking ............... 2
Functional Description ..................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 5
Auxiliary Functions ........................................................... 8
REV. MAR 27, 2006
Page 1 of 19
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H Series Data Sheet
50 Watt DC-DC Cassette Converters
Model Selection
Table 1: Model types
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency
1
Option
η
min
[%]
76
82
83
85
86
82
83
79
80
V2, V3
D1 to D8
-7
V
o nom
I
o nom
[VDC] [A]
5.1
12.0
15.0
24.0
48.0
12.0
15.0
5.1
5.1
1
2
V
o nom
I
o nom
[VDC] [A]
-
-
-
-
-
12.0
15.0
12.0
15.0
-
-
-
-
-
2.0
1.7
0.7
0.6
V
o nom
I
o nom
[VDC] [A]
-
-
-
-
-
-
-
12.0
15.0
-
-
-
-
-
-
-
0.7
0.6
V
i min
to
V
max
8 to 15 VDC
2
12H1001-2R
12H1301-2R
12H1501-2R
12H1601-2R
12H1901-2R
2
12H2320-2
12H2540-2
12H3020-2
12H3040-2
η
min
[%]
73
79
80
81
83
79
80
77
77
V
i min
to
V
i max
14 to 30 VDC
2
24H1001-2R
24H1301-2R
24H1501-2R
24H1601-2R
24H1901-2R
2
24H2320-2
24H2540-2
24H3020-2
24H3040-2
η
min
[%]
75
82
82
83
85
80
81
78
79
V
i min
to
V
i max
28 to 60VDC
2
48H1001-2R
48H1301-2R
48H1501-2R
48H1601-2R
48H1901-2R
2
48H2320-2
48H2540-2
48H3020-2
48H3040-2
8.0
4.0
3.4
2.0
1.0
2.0
1.7
5.0
5.0
Efficiency measured at
V
i nom
and
I
o nom
Input voltage range 12H1901-2R: 9 to 15 VDC, 24H1901-2R: 18 to 30 VDC, 48H1901-2R: 36 to 60 VDC
Model numbers highlighted in yellow or shaded are not recommended for new designs.
Part Number Description and Product Marking
Type Key
Input voltage range
V
i
:
48 H 2 5 40 -2 R D V
8 to 15 VDC ............. 12
14 to 30 VDC ............. 24
28 to 60 VDC ............. 48
Series ............................................................................... H
Number of outputs .................................................... 1 to 3
Output 1,
V
o1 nom
:
5.1 V
12 V
15 V
24 V
48 V
............... 0
............... 3
............... 5
............... 6
............... 9
Single output modules ................................................... 01
Output 2 and 3,
V
o2 nom
,
V
o3 nom
:
12 V ............. 20
15 V ............. 40
Options and features:
Ambient temperature range
T
A
–10 to 50 °C .................. -2
Extended temperature range
T
A
–25 to 71 °C ................. -7
Output voltage control input (single output modules only)R
Save data signal (D1 to D8, to be specified) .................... D
1
ACFAIL signal (V2, V3, to be specified) ........................... V
1
1
Option D excludes option V and vice versa
Example:
48H1501-2RD3: DC-DC converter, input voltage range 28 to 60 V, providing output with 15 V/3.4 A;
equipped with an output voltage control input and undervoltage monitoring.
REV. MAR 27, 2006
Page 2 of 19
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H Series Data Sheet
50 Watt DC-DC Cassette Converters
Functional Description
The input voltage is fed via an input filter to the input
capacitor. This capacitor sources a single-transistor forward
converter. Each output is powered by a separate secondary
winding of the main transformer. The resultant voltages are
rectified and their ripples smoothed by a power choke. The
control logic senses the main output voltage
V
o1
and
generates, with respect to the maximum admissible output
currents, the control signal for the primary switching
transistor. This signal is fed back via a coupling transformer.
The auxiliary outputs
V
o2
and
V
o3
are unregulated. Each
auxiliary output's current is sensed and transferred to the
main control circuit using a current transformer. If one of the
outputs is driven into current limit, the other outputs will
reduce their output voltages as well because all output
currents are controlled by the same control circuit.
03067
2
5
i
D/V
R
G
Main control circuit
1
1
14
17
20
Y
Vi+
29
23
Forward converter
approx. 70 kHz
Input filter
C
MKT
Current
limitation
output 2
C
MKT
Current
limitation
output 3
Y
Y
Y
8
14
17
Vi–
32
Y
26
11
1
Single output modules H1000 (R input)
Fig. 1
DC-DC converter block diagram
REV. MAR 27, 2006
Page 3 of 19
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H Series Data Sheet
50 Watt DC-DC Cassette Converters
Electrical Input Data
General conditions:
–
T
A
= 25 °C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, R input not connected.
Table 2: Input data
Input
Characteristics
Conditions
min
8
9
12
12H
typ
max
15
15
min
14
18
24
2.5
1.5
6
6
2
380
60
110
50
75
80
3300
20
750
0
1200
40
175
190
0
300
80
1
4
4
1.5
6
6
2
380
20
40
mΩ
μF
VDC
24H
typ
max
30
30
min
28
36
48
1.3
1
4
4
1.5
6
6
2
350
A
μs
A
W
48H
typ
max
60
60
Unit
VDC
V
i
Operating input voltage
I
o
= 0 to
I
o nom
T
to
T
C max
..H1901-2R
C min
V
i nom
Nominal input voltage
I
i
P
i 0
Input current
No-load input power:
Single output
Double output
Triple output
Idle input power
V
i nom
,
I
o nom 1
V
i nom
I
o1,2,3
= 0
5.0
1
4
4
P
i inh
t
inr r
t
inr h
R
i
C
i
inhibit mode
I
inr p 3
Peak inrush current
Rise time
Time to half value
Input resistance
Input capacitance
V
i
=
V
i max
R
S
= 0
Ω
2
T
C
= 25°C
T
C
= 25 °C
40
2200
0
U
i abs
Input voltage limits
without any damage
1
2
With multiple output modules, the same condition for each output applies.
R
S
= source resistance
3
I
inr p
=
V
i
/(R
s
+
R
i
)
Input Under-/Overvoltage Lockout
If the input voltage remains below 0.8
V
i min
or exceeds
1.1
V
i max
(approx. values), an internally generated inhibit
signal disables the output(s). When checking this function
the absolute maximum input voltage rating
V
i abs
must be
carefully considered (see table:
Electrical Input Data).
Between
V
i min
and the undervoltage lockout level the output
voltage may be below the value defined in table:
Output
data
(see:
Technical Information: Measuring and Testing).
Reverse Polarity
The converter is not protected against reverse polarity at
the input. (Reverse polarity will cause the external fuse to
blow.)
Input Fuse
The converters do not incorporate any fuse. External fuses
installed in the wiring to the inputs are essential.
Table 3: Recommended fuse types
Series
12H
24H
48H
Schurter type
SPT
SPT
10 A
8A
250 V
250 V
250 V
Part number
0001.2514
0001.2513
0001.2509
SPT 3.15 A
REV. MAR 27, 2006
Page 4 of 19
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H Series Data Sheet
50 Watt DC-DC Cassette Converters
Electrical Output Data
General conditions
–
T
A
= 25 °C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, R input not connected.
Table 4a: Output data
Output
Characteristics
Conditions
min
5.00
-
5.1 V
typ
max
5.20
min
11.76
11.10
12 V
typ
max
12.24
12.90
13.80
21
25
see:
Type Survey and Key Data
see fig.:
Typical output voltage V
o1
versus output currents I
o
30
60
50
200
±50
-
50
-
±5
-
±15
60
70
100
200
±100
±150
150
see:
H2320/H3020
= Δ
V
o 2/3
vers. I
o 2/3
±10
±30
see:
H2320/H3020
= Δ
V
o 2/3
vers. I
o 2/3
50
75
80
200
±100
±150
150
see:
H2540/H3040
=
Δ
V
o 2/3
vers. I
o 2/3
±15
±45
see:
H2540/H3040
= Δ
V
o 2/3
vers. I
o 2/3
mV
mV
pp
25
31
min
14.70
13.90
15 V
typ
max
15.30
16.10
17.25
Unit
V
V
o1
V
o2/3
V
o2/3 0
V
o1 P
V
o2/3 P
I
o nom
I
o L
V
o1/2/3
Output voltage
V
i nom
,
I
o nom 1
V
i min
to
V
i max
I
o2/3
= 0
-
7.5
-
Output overvoltage
protection
Output current
Output current
limitation response
V
i min
to
V
i max
T
C min
T
C max
to
Output Switch. freq.
V
i nom
,
I
o nom 1
voltage
IEC/EN 61204
Total
noise
BW = 20 MHz
Static line regulation
Δ
V
o1 U
Δ
V
o2/3 U
Δ
V
o1 I
Δ
V
o2/3 I
Δ
V
o1 Ic
Δ
V
o2/3 Ic
V
i min
to
V
i nom
V
i nom
to
V
i max
I
o nom 1
Static load regulation
V
i nom
I
o
=
I
o nom
to 0
2
Static cross load
regulation
3
V
i nom
I
o
=
I
o nom
to 0
4
Table 4b: Output data
Output
Characteristics
Conditions
min
23.52
41
24 V
typ
max
24.48
min
47.04
85
48 V
typ
max
48.96
Unit
V
V
o1
V
o P
I
o1 nom
I
o1 L
V
o1/2/3
Output voltage
Overvoltage prot.
Output current
Output current
limitation response
V
i nom
,
I
o1 nom
V
i min
to
V
i max
T
C min
to
T
C max
see:
Type Survey and Key Data
see:
Typical output voltage V
o1
versus output currents I
o
30
75
50
200
±150
20
35
40
150
±150
mV
mV
pp
Output Switch. freq.
V
i nom
,
I
o nom 1
voltage
IEC/EN 61204
Total
noise
BW = 20 MHz
Static line regulation
Δ
V
o1 U
V
i min
to
V
i nom
V
i nom
to
V
i max
I
o1 nom
Δ
V
o1 I
1
2
3
4
Static load regulation
V
i nom
I
o1
=
I
o1 nom
to 0
150
150
With multiple-output models, the same condition for each output applies.
Condition for specified output. With multiple output models, other output(s) loaded with constant current
I
o
=
I
o nom
.
Condition for non-specified output, individually tested, other output(s) loaded with constant current
I
o
=
I
o nom
.
Multiple-output models.
REV. MAR 27, 2006
Page 5 of 19
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