X Series Data Sheet
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
375, 500 Watt AC-DC (DC-DC) Converters Convert Select
Features
• RoHS lead-free-solder and lead-solder-exempted
products are available
• Rugged 35 mm DIN-rail snap-fit design
• Class I equipment
• Universal AC-input with single stage conversion AC to
DC or DC input of 90 to 350 V
• Power factor correction, harmonics IEC/EN 61000-3-2
• Virtually no inrush current
• Immunity to IEC/EN 61000-4-2, -3, -4, -5, -6, -11
• Emissions according to EN 55011/022
• Very high efficiency; up to 89%
• Short-term output peak power capability, rectangular
current limiting characteristic
• Single or two independently regulated outputs with 24,
36, or 48 V
• Outputs no-load, overload, and short-circuit proof
• PCBs protected by lacquer
• Very high reliability
Safety according to IEC/EN 50178, IEC 61010-1, IEC
60950-1, UL/CSA 60950-1 2
nd
Ed.
138
5.43"
194
7.64"
114
4.49"
Description
The Convert Select front end series represents a family of
DIN-rail mountable AC-DC and DC-DC converters with power
factor correction. The converters have been designed
according to the latest industry requirements and standards.
They are ideal for use in outdoor and other demanding
applications to power building control systems, factory
automation, industrial controls, instrumentation, electro-
magnetic drives, fans, and other DC loads. Different models
are available with a single output or two independently
regulated, electrically isolated outputs with 24, 36, or 48 V.
Special models for battery charging are available.
Key features of the Convert Select line include power factor
correction with low harmonic distortion, negligibly low inrush
current, high immunity to transients and surges, and low
electromagnetic emissions. Internal protection circuits such as
input over- and undervoltage lockout, thermal protection, as
well as output overvoltage protection by a second control loop
ensure safe operation of the final system.
The outputs deliver an electrically-isolated Safety Extra Low
Voltage, SELV, (except models LXR/LXN1740) and low output
noise. They are no-load, overload, and short-circuit proof. The
electronically controlled short-term peak power capability of up
to 150% of the rated output power enables the front end
converters to deliver additional power to start-up motors or to
safely operate subsequent circuit breakers. Built-in large sized
output capacitors absorb possible reverse energy, which may
Table of Contents
Page
Page
Immunity to Environmental Conditions ............................... 13
Mechanical Data ................................................................. 14
Safety and Installation Instructions ..................................... 15
Description of Options ........................................................ 17
Accessories ......................................................................... 20
Description ............................................................................ 1
Model Selection .................................................................... 2
Functional Description .......................................................... 4
Electrical Input Data .............................................................. 5
Electrical Output Data ........................................................... 7
Electromagnetic Compatibility (EMC) ................................. 12
Copyright © 2015, Bel Power Solutions Inc. All rights reserved.
BCD20021-G Rev AD, 29-Jul-2015
MELCHER
The Power Partners.
Page 1 of 21
X Series Data Sheet
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
be caused by quick deceleration of electromagnetic drives
connected directly to the output. A green LED at the front cover
displays the status of the output(s).
The Convert Select Series was designed according to all
relevant international safety standards. The converters are
approved by TÜV and UL, and are UL 508 listed. Adequate
clearances and creepage distances allow operation in
pollution degree 3 environment (with AC input). All board
assemblies are coated with a protective lacquer.
The thermal concept allows operation at full load up to an
ambient temperature of 60 °C in free air without forced cooling.
A rugged DIN snap-fit device allows easy and reliable fixing
onto the various 35 mm DIN-rail models. The converters are
fitted with cage clamp terminals easily accessible from the
front. System connectors with screw terminals for use with pre-
assembled harnesses, external adjustment of the output
voltage, as well as various auxiliary functions are available as
options.
Model Selection
Table 1: Standard models
Output 1
V
o1 nom1
I
o1 nom
[VDC]
[A]
24.7
24.7
37
37
49.4
49.4
24.7
37
49.4
1
2
3
4
5
6
7
Output 2
V
o2 nom1
I
o2 nom
[VDC]
[A]
-
-
-
-
-
-
24.7
37
49.4
-
-
-
-
-
-
10
6.7
5
Output Power
P
o nom
[W]
371
494
370
496
371
494
494
496
494
Operating Input
Voltage
V
i min
-
V
i max
85
2
– 264 VAC,
47 – 63 Hz
4
,
90
2
– 350 VDC
6
Type
Designation
LXR1601-6
LXN1601-6
LXR1701-6
3
LXN1701-6
3
LXR1801-6
LXN1801-6
LXN2660-6
LXN2770-6
3
LXN2880-6
Effic.
η
min 7
[%]
87
87
88
88
88
88
87
88
88
Options
3, 5
15
20
10
13.4
7.5
10
10
6.7
5
R
D1, D2, D5
M1, M2
F, K2
G
R-input not connected.
For derating at low input voltage see section
Output Power Derating.
For minimum quantity and lead times contact Power-One.
The converters have been tested up to 440 Hz; for operating frequencies <47 Hz or >63 Hz contact Power-One.
On double-output models the options R, M2, D1, D2, D5 are related to the 2
nd
output only.
V
i
≤
250 VDC for models with option F
Min. efficiency at
V
i nom
,
I
o nom
, and
T
A
= 25 °C. Typical values are approx. 2% better.
Table 2: Battery charger models (M1 included)
V
Bat
[VDC]
24
Output Voltage
V
o safe1
V
o max
[VDC]
[VDC]
25.68
1
38.52
1
51.36
1
29.3
Nominal Output Values
V
o nom 5
I
o nom 5
P
o nom 5
[VDC]
[A]
[W]
27.3
12.6
16.8
36
43.95
40.88
8.4
11.2
48
58.6
54.5
6.3
8.4
1
2
3
4
5
6
7
Operating Input
Voltage
V
i min
-
V
i max
85
2
– 264 VAC,
47 – 63 Hz
4
,
90
2
– 350 VDC
6
Type Designation
Effic. Options
3
η
min 7
[%]
87
87
87
87
87
87
F, K2,
G
344
458
343
458
343
458
LXR1240-6M1
LXN1240-6M1
LXR1840-6M1
3
LXN1840-6M1
3
LXR1740-6M1
LXN1740-6M1
Setting voltage (typ.) with open R-input
For derating at low input voltage see section
Output Power Derating.
For minimum quantity and lead times consult the factory.
The converters have been tested up to 440 Hz; for operating frequency <47 Hz or >63 Hz contact the factory
Nominal output figures, calculated with a cell voltage of 2.27 V at 20 °C.
V
i
≤
250 VDC for models with option F.
Min. efficiency at
V
i nom
,
V
o nom
,
I
o nom
, and
T
A
= 25 °C. Typical values are approx. 2% better.
NFND: Not for new designs.
Preferred for new designs
BCD20021-G Rev AD, 29-Jul-2015
MELCHER
The Power Partners.
Page 2 of 21
X Series Data Sheet
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
Part Number Description
L X N 2 660 -6 D2 F K2 G
Input voltage range .......................................................................... L
Series ............................................................................................. X
Nominal output power
375W .......................................................................... R
500 W ......................................................................... N
Number of outputs ....................................................................... 1, 2
Type specification .............................................................. 000 – 999
Operational ambient temperature range
T
A
–40 to 60 °C ............................................................... -6
Customer-specific .................................................. -0, -5
Options
Output voltage control input
2 .......................................................
R
Save data signal
2 ..........................................................
D1, D2, D5
Multiple functions via D-SUB connector
1 ..................
M1, M2
Built-in second fuse, input diode ................................. F
System connector ...................................................... K2
RoHS compliant for all six substances ....................... G
1
Only one of these options is possible.
Note:
The sequence of options must follow the order above.
NFND: Not for new designs.
Preferred for new designs
Example:
LXN2660-6D2FK2G: Power factor corrected AC-DC converter, operating input voltage range 85 – 264 VAC,
2 electrically isolated and individually regulated outputs, each providing 24.7 V, 10 A, options D2, F, K2, and RoHS-
compatible for all 6 substances.
Product Marking
Basic type designation, applicable safety approval and
recognition marks, CE mark, warnings, pin designation,
Company logo.
Specific type designation, input voltage range, nominal output
voltages and currents, degree of protection, batch and serial
number, data code including production site, version, date of
production.
BCD20021-G Rev AD, 29-Jul-2015
MELCHER
The Power Partners.
Page 3 of 21
X Series Data Sheet
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
Functional Description
The X Series converters are primary controlled AC-DC or DC-
DC flyback converters with a constant switching frequency of
130 kHz. The power-factor-corrected single-step conversion of
the input voltage to a low output voltage results in extremely
high efficiency. Depending on the output power, the converters
are fitted with three (375 W) or four (500 W) powertrains.
03105
Fuse
L
3
Output filter
Input filter
Input filter
C
y
C
Y
2
Vo+
3
6
7
Rectifier
Shunt
C
y
C
y
Shunt
N
2
2
nd
fuse
(option F)
C
Y
4
Vo–
5
8
9
1
Control circuit
including
PFC and
input OVP/UVP
V
o
/I
o
control
1
12
10
Aux1
11
Aux2
2
nd
control loop (SELV)
Fig. 1
LXR 375 W single-output converter.
03106
Fuse
Output filter
L
3
Input filter
Input filter
C
y
Rectifier
C
y
2
3
Vo+
+
Shunt
C
y
Shunt
N
2
2
nd
fuse
(option F)
1
C
y
C
y
4
5
Vo–
Control circuit
including
PFC and
input OVP/UVP
V
o
/I
o
control
2
nd
control loop (SELV)
C
y
6
7
Output filter
Input filter
Vo+
+
Shunt
C
y
Shunt
C
y
8
9
Vo–
Control circuit
including
PFC and
input OVP/UVP
V
o
/I
o
control
2
nd
control loop (SELV)
1
12
10
Aux1
11
Aux2
Fig. 2
LXN 500 W double-output converter
For the pinout of 500 W single-output models see fig. 1.
BCD20021-G Rev AD, 29-Jul-2015
MELCHER
The Power Partners.
Page 4 of 21
X Series Data Sheet
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
Models with four powertrains have one or two outputs. Double-
output models exhibit individual control of each output.
The input voltage is fed via fuse, filter, and rectifier to the
powertrains with main transformers designed in planar
technique. The input filter with very small input capacitance
generates virtually no inrush current. An input transient
suppressor protects the converter against high voltage peaks
and surges. Input over- and undervoltage lockout as well as
input current limitation protect the converter from operation
outside of its specification. The input voltage waveform is
sensed by the primary control logic to allow active power factor
correction, forcing the input current to follow the input voltage
waveform.
The secondary side of each main transformer supplies via the
rectifier diode a large electrolytic output storage capacitor
providing for the hold-up time. Double-output models exhibit an
individual control logic for each output. The output voltage and
the output current are measured and fed back to the primary
control logic via an optocoupler. A second control loop monitors
the output voltage. It disables the output in the case of a failure
in the control logic and limits the output voltage.
Built-in temperature sensors monitor the internal temperature of
each powertrain. If the temperature exceeds the limit, the
converter reduces the output power continuously to keep the
temperature below its limit. A green LED on the front cover
confirms the presence of the output voltage(s).
The R input (option R, M1, or M2) allows for external adjustment
of the output voltage by means of a resistor or an external
voltage source. An external sensor can be connected to the R
input and allows for temperature-controlled battery charging;
see
Accessories.
Electrical Input Data
General conditions:
T
A
= 25 °C, unless
T
C
is specified.
Table 3: Input data LW models
Input
AC-Input
Characteristic
V
i
V
i nom
f
i
I
i
P
i0
I
inrush
C
i
PF
V
i RFI
Operating input voltage
range
Rated input volt. range
Rated input frequency
1
Input current
No-load input power
Inrush current
Input capacitance
Power factor
Conducted input RFI
Radiated input RFI
f
switch
1
2
3
LXR
DC-Input
typ
max
350
3
220
--
1.95
5.0
3
5
5
--
A
A
0.90
A
AC-Input
min
85
2
LXN
DC-Input
typ
max
350
3
220
--
2.6
6.6
3
5
6
--
A
Unit
Conditions
I
o
= 0 –
I
o nom
T
c
–
T
c max
min
85
2
100
typ
max min
264
90
2
typ max min
264
90
2
V
(230) 240
50 – 60
100 (230) 240
50
–
60
2.6
7.0
3
5
6
Hz
A
W
A
µF
I
o nom,
V
i
=
V
i nom
I
o nom,
V
i
=
V
i min
V
i min
–
V
i max
V
i max
, t
> 0.1 ms
1.9
5.2
3
5
5
V
i nom
= 230 V,
I
o nom
EN 55011/55022
V
i nom,
I
o nom
0.90
Switching frequency
130
130
130
130
kHz
For operating frequencies <47 Hz and >63 Hz contact the factory. The converters have been tested up to 440 Hz.
Output power derating at low input voltage and/or high case temperature
T
C
; see
Output Power Derating.
V
i
≤
250 VDC for models with option F.
BCD20021-G Rev AD, 29-Jul-2015
MELCHER
The Power Partners.
Page 5 of 21
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