LWN1240-6EM1 POWER ONE, LWN1240-6EM1 Datasheet - Page 23

• Manufacturer Part Number: LWN1240-6EM1
• Manufacturer: POWER ONE

Specifications of LWN1240-6EM1

• Input Voltage: 85 to 264V
• Number Of Outputs: 1
• Input Frequency: 47 to 65Hz
• Screening Level: Commercial
• Product Length (mm): 138mm
• Product Height (mm): 128mm
• Product Depth (mm): 113.6mm
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 60C
• Mounting Style: Din-Rail
• Pin Count: 5
• Lead Free Status / RoHS Status: Not Compliant

R: Adjustment of V
The R input allows external adjustment of the output voltage in
the range of 50% to 110% V
only adjustment of output 2 (connected to the terminals 6, 7, 8
and 9). This enables asymmetric output voltage configuration.
Adjustment can be achieved via a resistor or an external
voltage source (in the range of 1.25 – 2.75 V).
a) Adjustment by an external resistor:
b) Adjustment by an external control voltage V
In battery charging systems, an external battery temperature
sensor (see Accessories) can be connected to optimize V
However, adjustment using the R input (pin 2 of D-SUB) is
possible as well. The above shown formulas are valid, but
V
F: Built-in Second Fuse
A built-in second fuse in the neutral line provides safe phase-
BCD20020-G Rev AB1, 17-Nov-09
Table
V
o nom
System Status
System OK
Battery overchared / temp. sensor
defect / control voltage to high
Overload, converter cannot follow the
control signal
Output does not follow control signal,
since battery would be overcharged
System OK
Note: If the R input is not connected: V
Caution: To prevent damage, V
negative.
Note: If longer wires are used to connect the R input at the D-SUB
connector, the wiring to pin 1 (GND1) should be done as star point
connection. If wired differently, the output voltage setting may be
adversely affected.
o
Note: If the R function is not included in M1 or M2, refer to figure
20 how to connect
Resistor R
1) of the D-SUB connector or according to fig. 20.
Resistor R
of the D-SUB connector or according to fig. 20.
V), connected between R (pin 2) and GND (pin 1) of the D-
SUB connector or according to fig. 20.
V
= 100 – 110% V
o
= 50 – 100% V
V
19:
stands for the voltage with open R input (= V
ext
System OK (M1 with external battery sensor)
2.5 V • –––––
ext1
ext2
, connected between R (pin 2) and VCC (pin 3)
, connected between R (pin 2) and GND1 (pin
o nom
R
V
o nom
ext1
o nom
V
o
o
. R
®
or V
or
. R
ext2
R
ext2
o nom
o2
ext1
ext
4 k • –––––– ––––––––––
.
V
. Double-output models allow
should not exceed 3 V, nor be
o
4 k • –––––– –––
o
V
or V
o nom
2.5 V•(V
o2
V
V
• ––––
o nom
o
– 2.5 V
2.5 V
V
V
V
o
/ V
o nom
o
ext
ext
125, 250 Watt AC-DC and DC-DC DIN-Rail Converters
– V
o nom
Input
O.K.
O.K.
O.K.
O.K.
O.K.
(1.25 – 2.75
.
o
o safe
–1)
).
Page 23 of 25
o
.
sensor signal
to-phase connection at low mains voltages (e.g., USA 120 V/
208 V / 60 Hz systems).
The built-in second fuse also enables safe connection to the
mains, where phase and neutral are not defined or cannot be
identified, as e.g., in the case of plug and socket connection to
the mains via German Schuko-plugs; see also Safety and
Installation Instructions.
Option F limits the DC input voltage to 250 V.
Q: Reverse Polarity Protection
EW models have no bridge rectifier at the input. To provide
reverse polarity protection, an additional diode can be fitted.
However this lowers the efficiency by approximately 1%.
K2: System Connectors
For installation in systems using pre-assembled harnesses the
converters are available with system connectors. They are UL-
listed, approved for currents up to 15 A at –40 to 105 °C.
The mating system connectors with screw terminals and
retainers are delivered together with every converter with
option K2. Use max. 2.5 mm
wires, or max. 1.5 mm
termination, stripped length 6 mm. Tightening torque of input/
output terminals: max. 0.79 Nm (7 lbs.in.).
G: RoHS
RoHS compliant for all six substances.
Fig. 24
System connectors Option K2
V
2.7 V
2.7 V
2.7 V
3.0 V
2.5 V
control
theoretical
27 V
27 V
27 V
30 V
25 V
V
Bat
2
(AWG 14) stranded wires with crimp
measured
W Series Data Sheet
2
27 V
28 V
24 V
27 V
V
25V
(AWG 12) solid or stranded
Bat
www.power-one.com
High ohmic
High ohmic
High ohmic
Low ohmic
Low ohmic
Sys-OK
output