Cassette Style
AC-DC Converters
M Series
50 Watt AC-DC (DC-DC) Converters
Input voltage range 85...264 V AC
1, 2 or 3 isolated outputs up to 48 V DC
3 kV AC I/O electric strength test voltage
• Extremely wide input voltage range suitable for most
AC mains around the world
• Efficient input filter and built-in surge and transient
suppression circuitry
• Outputs individually isolated and controlled
• Outputs fully protected against overload
Safety according to IEC/EN 60950
LGA
M Series
111
4.37"
3U
Summary
The M series of AC-DC (DC-DC) converters represents a
broad and flexible range of power supplies for use in ad-
vanced industrial electronic systems. Features include high
efficiency, reliability, low output voltage noise and excellent
dynamic response to load/line changes due to individual
regulation of each output.
The converter inputs are protected against surges and tran-
sients occuring at the Input. An input over- and under-
voltage lock-out circuitry disables the outputs if the input
voltage is outside the specified range. These types include
an inrush current limitation preventing circuit breakers and
fuses from being damaged at switch-on.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppressor
diodes. The outputs can be inhibited by a logic signal ap-
plied to the connector pin 2 (i). If the inhibit function is not
used pin 2 should be connected to pin 23 to enable the out-
puts.
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 modules are designed
and built according to the international safety standard
IEC/EN 60950 and have been approved by the safety agen-
39
1.54"
8 TE
168
6.6"
cies LGA (Germany) and UL (USA). The UL Mark for
Canada has been officially recognized by regulatory au-
thorities in provinces across Canada.
The case design allows operation at nominal load up to
71°C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 71°C but
the case temperature should remain below 95°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 in-
dividual applications.
The modules may either be plugged into 19" rack systems
according to DIN 41494, or be chassis mounted.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ............................ 11
Immunity to Environmental Conditions ........................... 13
Mechanical Data ............................................................ 14
Safety and Installation Instructions ................................ 15
Description of Options .................................................... 18
Accessories .................................................................... 24
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 3
Functional Description ...................................................... 4
Electrical Input Data ......................................................... 5
Electrical Output Data ...................................................... 6
Auxiliary Functions ........................................................... 9
Edition 5/5.2000
1/24
Cassette Style
Type Survey and Key Data
AC-DC Converters
M Series
Non standard input/output configurations or special custom adaptions are available on request. See also:
Commercial In-
formation: Inquiry Form for Customized Power Supply.
The type survey tables provide an overview of the basic input and output configurations. More than 1000 different types
have been manufactured providing different output configurations and customized specialities. Please consult Power-
One's field sales engineers for specific requirements. The best technical solution will carefully be considered and a detailed
proposal submitted.
Table 1: Class I equipment
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency
1
Options
U
o nom
I
o nom
[V DC] [A]
5.1
12.0
15.0
24.0
48.0
12.0
15.0
5.1
5.1
8.0
4.0
3.4
2.0
1.0
2.0
1.7
5.0
5.0
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
12.0
15.0
12.0
15.0
-
-
-
-
-
2.0
1.7
0.7
0.6
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
-
-
12.0
15.0
-
-
-
-
-
-
-
0.7
0.6
U
i min
...U
i max
85…264 V AC/47...440 Hz
(88…372 V DC)
LM 1001-7R
LM 1301-7R
LM 1501-7R
LM 1601-7R
LM 1901-7R
LM 2320-7
LM 2540-7
LM 3020-7
LM 3040-7
h
min
[%]
73
79
78
81
81
77
78
73
71
–9
E
P
D0...D9
V0,V2,V3
A
H
F
Table 2: Class II equipment (double insulation)
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency
1
Options
U
o nom
I
o nom
[V DC] [A]
5.1
12.0
15.0
24.0
48.0
12.0
15.0
5.1
5.1
1
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
12.0
15.0
12.0
15.0
-
-
-
-
-
2.0
1.7
0.7
0.6
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
-
-
12.0
15.0
-
-
-
-
-
-
-
0.7
0.6
U
i min
...U
i max
85…264 V AC/47...65 Hz
(88…372 V DC)
LMZ 1001-7R
LMZ 1301-7R
LMZ 1501-7R
LMZ 1601-7R
LMZ 1901-7R
LMZ 2320-7
LMZ 2540-7
LMZ 3020-7
LMZ 3040-7
η
min
[%]
73
79
78
81
81
77
78
73
71
–9
E
P
D0…D9
V0,V2,V3
A
H
F
8.0
4.0
3.4
2.0
1.0
2.0
1.7
5.0
5.0
Efficiency at
U
i nom
and
I
o nom
.
Edition 5/5.2000
2/24
Cassette Style
Type Key
Type Key
AC-DC Converters
M Series
L M Z 2 5 40 -7 E R P D V A H F
Input voltage range
U
i
: 85...264 V AC, 88...372 V DC .... L
Series .............................................................................. M
Class II Equipment ........................................................... Z
Number of outputs ...................................................... 1...3
Output 1,
U
o1 nom
:
5.1 V ....................................................... 0...2
12 V ............................................................. 3
15 V ........................................................ 4...5
24 V ............................................................. 6
other voltages ......................................... 7...8
48 V ............................................................. 9
other specs for single output modules .................... 01...99
Output 2 and 3,
U
o2 nom
,
U
o3 nom
:
5.1 V ................................................... 01...19
12 V .................................................... 20...39
15 V .................................................... 40...59
24 V .................................................... 60...69
other voltages for multiple output modules ............. 70...99
Ambient temperature range
T
A
:
–25…71°C .................................................. -7
–40…71°C .................................................. -9
customer specific .................................. -0...-6
Auxiliary functions and options:
Inrush current limitation ............................... E
Output voltage control input
(single output modules only) ....................... R
Potentiometers for fine adjustment
of output voltages ........................................ P
Save data signal (D0...D9, to be specified) D
ACFAIL signal (V0, V2, V3, to be specified) V
Output voltage test sockets ......................... A
Increased electric strength test voltage (o/c)H
Input fuse built-in (not accessible) ............... F
1
2
1
1
2
2
Feature R excludes option P and vice versa
Option D excludes option V and vice versa
Example:
LM 2540-7PD3A: AC-DC converter, input voltage range 85...264 V, providing output 1 with 15 V/1.7 A and
output 2 with 15 V/1.7 A; equipped with potentiometers, undervoltage monitoring and test sockets.
Edition 5/5.2000
3/24
Cassette Style
Functional Description
AC-DC Converters
M Series
The input voltage is fed via an input fuse, an input filter, a
rectifier and an inrush current limiter 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 and an output
filter. The control logic senses the main output voltage
U
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
U
o2
and
U
o3
are individually regulated
by means of secondary switching transistors. Each auxili-
ary output's current is sensed using a current transformer. If
one of the outputs is driven into current limit, the other out-
puts will reduce their output voltages as well because all
output currents are controlled by the same main control cir-
cuit.
P (option)
03081
2
5
i
D/V
R
G
Main control circuit
2
2
14
17
20
23
C
Y
N
29
Output 1
filter
Forward converter
approx. 70 kHz
VDR
C
MKT
Control
circuit
Output 2
filter
14
17
Input filter
Fuse
1
C
MKT
Control
circuit
Output 3
filter
8
11
P
32
NTC
26
C
Y
Fig. 1a
Block diagram, class I equipment
P (option)
03082
C
Y
C
Y
2
5
i
D/V
R
G
Main control circuit
2
2
14
17
20
23
N
29
Output 1
filter
Forward converter
approx. 70 kHz
VDR
C
MKT
Control
circuit
Output 2
filter
14
17
Input filter
Fuse
1
C
MKT
Control
circuit
Output 3
filter
8
11
P
32
NTC
1
Fig. 1b
Block diagram, class II equipment (double insulation)
2
Inrush current limiter (option E: refer to the description of
option E)
Single output modules LM 1000 and LMZ 1000 with feature R
Edition 5/5.2000
4/24
Cassette Style
Electrical Input Data
AC-DC Converters
M Series
General conditions:
–
T
A
= 25°C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, with option P:
U
o
=
U
o nom
, R input not connected.
Table 3: Input data
Input
Characteristics
Conditions
min
85
88
310
2
LM/LMZ
typ
max
264
372
7
Unit
V AC
1
V DC
1
U
i
U
i nom
I
i
i
i
P
i 0
Operating Input voltage
I
o
= 0…I
o nom
T
C min
…
T
C max
Nominal input voltage
DC input current
AC input current
U
i
= 310 V DC,
I
o nom 3
U
i
= 115 V AC,
I
o nom 3
U
i
= 230 V AC,
I
o nom 3
U
i nom
I
o1,2,3
= 0
0.20
0.77
0.43
1
7
6
1.5
9
9
2
60
6
300
900
6200
6
140
–400
0
270
400
284
A DC
A
rms
1
No-load input power:
Single output
Double output
Triple output
Idle input power
Peak inrush current
8
Rise time
8
Time to half value
8
Input resistance
8
Input capacitance
Input voltage limits
without any damage
W
P
i inh
I
inr p 4
t
inr r
t
inr h
R
i
C
i
U
i abs
inhibit mode
U
i
=
U
i max
R
S
= 0
Ω
5
T
C
= 25°C
T
C
= 25°C
A
µs
mΩ
µF
V DC
V AC
In AC powered mode:
LM types: 47...440 Hz;
LMZ types: 47...65 Hz.
2
310 V DC corresponds with
220 V AC.
3
With multiple output modules,
the same condition for each
output applies.
4
I
inr p
=
U
i
/(R
s
+
R
i
).
5
R
= source resistance.
S
6
Value for initial switch-on cy-
cle.
7
With LMZ converters, the
maximum nominal DC output
voltage from the front end is
250 V according to IEC/EN
60950.
8
Not valid for units with option
E. See description of options.
Input fuse
A fuse holder containing a slow-blow type fuse (Dimension:
5
×
20 mm) is mounted in the converter's back plate. The
fuse protects the module against severe defects. It may not
fully protect the module at input voltages exceeding
200 V DC. In applications where the converters operate at
DC source voltages above 200 V DC, an external fuse or a
circuit breaker at system level should be installed.
For applications where the fuse should be inaccessible: see
Option F.
Input Under-/Overvoltage Lock-out
If the input voltage remains below 0.8
U
i min
or exceeds
1.1U
i max
(approx. values), an internally generated inhibit
signal disables the output(s). When checking this function
the absolute maximum input voltage rating
U
i abs
must be
carefully considered (see table:
Input Data).
Between
U
i min
and the undervoltage lock-out level the output voltage may
be below the value defined in table:
Output data
(see:
Tech-
nical Information: Measuring and Testing).
Inrush Current
Part number
0001.2508
Table 4: Fuse type (slow-blow)
Series
LM/LMZ 1000...3000
Schurter type
SPT 2.5 A
250 V
I
i
[A]
04046
1.00
The modules incorporate an NTC resistor in the input cir-
cuitry which (during the initial switch-on cycle) limits the
peak inrush current to avoid damage to connectors and
switching devices. Subsequent switch-on cycles within a
short interval will cause an increase of the peak inrush cur-
rent due to the warming up of the NTC resistor. Refer also
to:
Option E
description.
I
i
[A]
50
40
30
20
04053
0.10
1
2
3
4
5
6
U
i
DC
____
U
i min
DC
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
t
[ms]
Fig. 2
Typical input current versus relative input voltage at
nominal output load
Edition 5/5.2000
Fig. 3
Typical inrush current at initial switch-on cycle and at
U
i max
(DC) versus time
5/24
Analog electronics
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