LWN1240-6EM1 POWER ONE, LWN1240-6EM1 Datasheet - Page 12

• 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

certain temperature is reached, the concerned powertrain
reduces its output power continuously.
Thermal Considerations
The thermal conditions are influenced by input voltage, output
current, airflow, and temperature of surrounding components.
T
Battery Charging and Temperature Sensor
BCD20020-G Rev AB1, 17-Nov-09
Fig. 8
Short term peak power characteristic: overcurrent versus
time (typical values).
Fig. 9
Trickle charge voltage versus temperature for different
temperature coefficients (V
A max
Cell voltage [V]
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
Caution: The installer must ensure that under all operating
conditions T
Temperature specifications.
Note: Sufficient forced cooling allows T
provided that T
continuous operation under worst case conditions of the
following 3 parameters be avoided: Minimum input voltage,
maximum output power, and maximum temperature.
1.6
1.4
1.2
1.0
0.6
0.8
o
- - 0.5
/
–20
is therefore, contrary to T
o nom
o safe
C
C
–10
= 2.27 V, –3 mV/K
= 2.23 V, –3 mV/K
C
0
remains within the limits stated in the table
C max
0
is not exceeded. It is recommended that
0.5
®
o safe
10
1
with disconnected sensor)
C max
20
, an indicative value only.
A
C
C
to be higher than T
1.5
= 2.27 V, –3.5 mV/K
= 2.23 V, –3.5 mV/K
30
125, 250 Watt AC-DC and DC-DC DIN-Rail Converters
2
40
06139b
05194b
2.5 s
50 °C
A max
Page 12 of 25
The battery charger models exhibit the option M1 and have
been designed to charge lead-acid batteries. The R-input
allows for connecting a battery-specific temperature sensor,
which provides temperature controlled adjust of the trickle
charge voltage. This optimizes charging as well as battery life
time. Depending upon the cell voltage and the temperature
coefficient of the battery, different sensor types are available;
see Accessories.
Fig. 10
Schematic circuit diagram of a system with battery backup
and temperature-controlled charging.
Note: Parallel operation is not possible, if the temperature sensor
is connected to the paralleled outputs Vo+, as the sensor
eliminates the output voltage droop.
However, it is possible to insert bleeding resistors in the Vo+
output lines of each converter in order to create a droop of approx.
0.6 V @ I
this creates considerable power losses.
Input
o nom
Power
supply
for 24 V outputs (1.2 V @ I
Vo+
Vo–
R
Temperature sensor
–
+
W Series Data Sheet
o nom
for 48V outputs), but
www.power-one.com
Battery
+
Load
03099d