Electrical
Accessory Products
Temperature Sensors
Temperature Sensors
Description
Power-One offers a wide range of battery charger systems
for power requirements of 50 Watt up to 8000 Watt.
For this purpose Power-One supplies temperature sensors
and adapted power supplies. The batteries (lead acid bat-
teries) are charged according to the battery temperature
and the ambient temerature. If the battery is fully charged it
is maintained at the float charge voltage which represents
the optimum point for maximum available energy in case of
Cell voltage [V]
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
-20
[°C]
50
need and optimum life expectancy of the battery. The type
of sensor needed is defined mainly by three parameters:
The nominal battery voltage (e.g. 24 V or 48 V), the tempe-
rature coefficient of the battery (e.g. –3.0 mV/K/cell) and the
nominal floating charge voltage per cell of the battery
at 20°C (e.g. 2.27 V/cell). The latter two are defined in the
specifications of the battery given by the respective battery
manufacturer.
06139
-10
0
10
20
30
40
U
C
= 2.27 V, –3 mV/K
U
C
= 2.23 V, –3 mV/K
U
C
= 2.27 V, –3.5 mV/K
U
C
= 2.23 V, –3.5 mV/K
Fig. 1
Float charge voltage versus temperature for defined tem-
perature coefficient.
03099
Vi+
Vi–
Power
supply
Vo+
Vo–
R /U
CR
input
Load
Temperature sensor
Fig. 2
Functional description
Table of Contents
Description ....................................................................... 1
Temperature Sensors for T and U units ........................... 1
Mechanical Dimensions ................................................... 2
Edition 5/06.2001
+
–
ϑ
Battery
Page
Page
Temperature Sensors for
M, H, S, K, KP, PSx, LW, OK Units .................................. 3
Mechanical Dimensions ................................................... 3
Fail Safe Operation .......................................................... 4
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Electrical
Accessory Products
Temperature Sensors
Temperature Sensors for T and U units
T and U units feature a cell voltage selector switch (feature
Z) to set the required floating charge voltage at 20°C di-
rectly at the unit. If this Z switch is used the 2.23 V/cell sen-
sor types should be selected in any case as a basis and the
selection criteria are only the temperature coefficient of the
battery and the nominal battery voltage. If for example a
24 V battery is used which has a cell voltage of 2.27 V/cell
and a temperature coefficient of –3.5 mV/K/cell, the sensor
type is S24-2.23-35-02. The setting on the Z switch of the T
or U unit should be 2.27.
For units without the Z selector switch a sensor according
to both criteria should be selected. In our example it would
be S24-2.27-35-02.
For further details please consult the T or U datasheet.
Table 1: Type survey T sensors
Nominal battery
voltage
[V]
24
24
24
36
36
36
48
48
48
48
48
48
48
Sensor type
S24-2.23-30-02
S24-2.23-35-02
S24-2.23-45-02
S36-2.23-30-02
S36-2.23-35-02
S36-2.27-35-02
S48-2.23-30-02
S48-2.23-35-02
S48-2.23-40-02
S48-2.23-45-02
S48-2.27-30-02
S48-2.27-35-02
S48-2.27-45-02
Part no.
MQC02052
MQC02053
MQC02051
MQC02081
MQC02082
MQC02083
MQC02008
MQC02009
MQC02013
MQC02012
MQC02010
MQC02007
MQC02006
Cell voltage
[mV]
2.23
2.23
2.23
2.23
2.23
2.27
2.23
2.23
2.23
2.23
2.27
2.27
2.27
Temp. coefficient
[mV/K/cell]
–3.0
–3.5
–4.5
–3.0
–3.5
–3.5
–3.0
–3.5
–4.0
–4.5
–3.0
–3.5
–4.5
Cable length
[m]
2
2
2
2
2
2
2
2
2
2
2
2
2
Other types for different cell voltages or temperature coefficients are available upon request.
05064
05148
+
— Sensor
wires
Sensor Temperature
sensor
cable
U
Ucr
Vo+
+
—
Vo–
Battery
2
white
1
brown
9
green
+
– Sensor
wires
Sensor Temperature
sensor
cable
i/Ucr
Vo+
Vo—
28
white
12
brown
22
green
+
–
Battery
Fig. 3:
Connection to the T unit.
Fig. 4:
Connection to the U unit.
Mechanical Dimensions
All dimensions in mm, tolerances
±0.3
mm unless otherwise specified.
15
25
±
0.2
12
09044
European
Projection
l
l: 2 m standard length
other cable lengths on request
≤60
adhesive tape
Fig. 5
T and U temperature sensor with mounting fixture.
Edition 5/06.2001
2/4
14.5
Electrical
Temperature Sensors for
M, H, S, K, KP, PSx, W, OK Units
Accessory Products
Temperature Sensors
With M, H, S, K, KP, PSx, W and OK units the sensor signal
acts on the R pin to adjust the output voltage relative to the
battery temperature and the ambient temperature. As these
units in contrast to the T and U units do not feature a cell
voltage selector switch (Z switch) the sensor selection crite-
ria is in every case both the cell voltage and the tempera-
ture coefficient (beside the nominal battery voltage).
If the application uses for example a 48 V battery with a cell
voltage of 2.23 V/cell and a temperature coefficient of
–3.0mV/K/cell the sensor S-KSMH48-2.23-30-2 should be
selected.
Table 2: Type survey S-KSMH sensors
Nominal battery
voltage
[V]
12
24
24
48
48
Sensor type
S-KSMH12-2.27-30-2
S-KSMH24-2.27-35-2
S-KSMH24-2.27-30-2
S-KSMH48-2.27-35-2
S-KSMH48-2-27-30-2
Part no.
MQC03005
MQC03002
MQC03004
MQC03001
MQC03003
Cell voltage
[mV]
2.27
2.27
2.27
2.27
2.27
Temp. coefficient
[mV/K/cell]
-3.0
-3.5
-3.0
-3.5
-3.0
Cable length
[m]
2
2
2
2
2
Other types for different cell voltages or temperature coefficients are available upon request.
05163
+
– Sensor
wires
Sensor Temperature
sensor
cable
R
Vo+
Vo–
white
brown
green
+
–
Battery
Fig. 6
Connection to a M, H, S, K, KP, LW or OK unit.
Mechanical Dimensions
All dimensions in mm, tolerances
±0.3
mm unless otherwise specified.
European
Projection
S90051
55 (2.17")
26 (1.02")
Fig. 7
S-KSMH temperature sensor.
Edition 5/06.2001
9.8 (0.4")
3/4
Electrical
Fail Safe Operation
Accessory Products
Table 3:
Nominal battery voltage
[V]
12
24
36
48
60
Temperature Sensors
To prevent overcharging of the battery but still maintain a
minimum charging in case of interruption of the sensor sig-
nal cable to the power supply, Power-One has designed
units with a special nominal output voltage setting. These
units differ from the respective standard units described in
the datasheet in the nominal output voltage and output
current settings. Without the sensor connected to the R pin
the output voltage will be higher than the nominal battery
voltage to avoid a discharging of the battery but still lower
than the theoretically needed float charge voltage. As soon
as the sensor is connected to the R pin the output voltage
will be set to the correct value.
Output voltage setting
(20°C) [V]
12.84
25.68
38.52
51.36
64.2
Tabel 4: Special units for battery charging
U
batt
[V]
12
24
36
48
60
P
o
50 Watt
LM 1781-7R
LM 1782-7R
LM 1783-7R
LM 1784-7R
LM 1785-7R
P
o
70 Watt
LH 1781-2R
LH 1782-2R
LH 1783-2R
LH 1784-2R
LH 1785-2R
P
o
100 Watt
LS 4740-7R
LS 5740-7R
P
o
150 Watt
LK 4740-7R
LK 5740-7R
P
o
250 Watt
LKP 5740-6R
LS 5740-7R
LK 5740-7R
LKP 5740-6R
Higher power requirements can be covered by paralleling
of these units. Complete microprocessor controlled sys-
tems of un-interuptable power suplies (UPS) are realized
by our Applications Center. Please consult your local
Power-One representant.
Edition 5/06.2001
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