Datasheet S-KSMH12-2.27-30-2, S-KSMH24-2.27-30-2, S-KSMH24-2.27-35-2, S-KSMH48-2-27-30-2, S-KSMH48-2.27-35-2 Datasheet (POWER-ONE)

Electrical Accessory Products Temperature Sensors

Edition 5/06.2001 1/4

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 bat­teries) 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

Table of Contents Page

Description ....................................................................... 1

Temperature Sensors for T and U units ........................... 1

Mechanical Dimensions ................................................... 2

Page

Temperature Sensors for

M, H, S, K, KP, PSx, LW, OK Units .................................. 3

Mechanical Dimensions ................................................... 3

Fail Safe Operation .......................................................... 4

Power
supply

Load

–

+

Vo+

Vi+

Vo–Vi–

R/

U

CR

input

Temperature sensor

ϑ

03099

Battery

Fig. 2
Functional description

2.10

2.15

2.20

2.25

2.30

2.35

2.40

2.45

Cell voltage [V]

-20 -10 0 10 20 30 40 50

[°C]

06139

U

C

= 2.27 V, –3 mV/K

U

C

= 2.27 V, –3.5 mV/K

U

C

= 2.23 V, –3 mV/K

U

C

= 2.23 V, –3.5 mV/K

Fig. 1
Float charge voltage versus temperature for defined tem­perature coefficient.

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 tempe­rature 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.

Electrical Accessory Products Temperature Sensors

Edition 5/06.2001 2/4

Table 1: Type survey T sensors

Nominal battery Sensor type Part no. Cell voltage Temp. coefficient Cable length

voltage [V] [mV] [mV/K/cell] [m]

24 S24-2.23-30-02 MQC02052 2.23 –3.0 2
24 S24-2.23-35-02 MQC02053 2.23 –3.5 2
24 S24-2.23-45-02 MQC02051 2.23 –4.5 2
36 S36-2.23-30-02 MQC02081 2.23 –3.0 2
36 S36-2.23-35-02 MQC02082 2.23 –3.5 2
36 S36-2.27-35-02 MQC02083 2.27 –3.5 2
48 S48-2.23-30-02 MQC02008 2.23 –3.0 2
48 S48-2.23-35-02 MQC02009 2.23 –3.5 2
48 S48-2.23-40-02 MQC02013 2.23 –4.0 2
48 S48-2.23-45-02 MQC02012 2.23 –4.5 2
48 S48-2.27-30-02 MQC02010 2.27 –3.0 2
48 S48-2.27-35-02 MQC02007 2.27 –3.5 2
48 S48-2.27-45-02 MQC02006 2.27 –4.5 2

Other types for different cell voltages or temperature coefficients are available upon request.

+

—

Battery

Vo+

i/Ucr

Vo—

Temperature

sensor

Sensor

cable

Sensor

wires

+

—

28

05064

12

22
green

brown

white

+

–

Battery

Vo+

Ucr

Vo–

Temperature

sensor

Sensor

cable

Sensor

wires

+

–

2

05148

1

9

U

green

brown

white

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.

≤60

12

l

l: 2 m standard length

other cable lengths on request

25

± 0.2

adhesive tape

15

14.5

09044

European
Projection

Fig. 5
T and U temperature sensor with mounting fixture.

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 di­rectly at the unit. If this Z switch is used the 2.23 V/cell sen­sor 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.

Electrical Accessory Products Temperature Sensors

Edition 5/06.2001 3/4

Temperature Sensors for
M, H, S, K, KP, PSx, W, OK Units

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 crite­ria is in every case both the cell voltage and the tempera­ture 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 Sensor type Part no. Cell voltage Temp. coefficient Cable length

voltage [V] [mV] [mV/K/cell] [m]

12 S-KSMH12-2.27-30-2 MQC03005 2.27 -3.0 2
24 S-KSMH24-2.27-35-2 MQC03002 2.27 -3.5 2
24 S-KSMH24-2.27-30-2 MQC03004 2.27 -3.0 2
48 S-KSMH48-2.27-35-2 MQC03001 2.27 -3.5 2
48 S-KSMH48-2-27-30-2 MQC03003 2.27 -3.0 2

Other types for different cell voltages or temperature coefficients are available upon request.

Mechanical Dimensions

All dimensions in mm, tolerances ±0.3 mm unless otherwise specified.

European
Projection

+

–

Battery

Vo+

R

Vo–

Temperature

sensor

Sensor

cable

Sensor

wires

+

–

05163

green

brown

white

Fig. 6
Connection to a M, H, S, K, KP, LW or OK unit.

Fig. 7
S-KSMH temperature sensor.

9.8 (0.4")

55 (2.17") 26 (1.02")

S90051

Electrical Accessory Products Temperature Sensors

Edition 5/06.2001 4/4

Tabel 4: Special units for battery charging

U

batt

[V]

P

o

50 Watt

P

o

70 Watt

P

o

100 Watt

P

o

150 Watt

P

o

250 Watt

12 LM 1781-7R LH 1781-2R LS 4740-7R LK 4740-7R
24 LM 1782-7R LH 1782-2R LS 5740-7R LK 5740-7R LKP 5740-6R
36 LM 1783-7R LH 1783-2R
48 LM 1784-7R LH 1784-2R LS 5740-7R LK 5740-7R LKP 5740-6R
60 LM 1785-7R LH 1785-2R

Fail Safe Operation

To prevent overcharging of the battery but still maintain a
minimum charging in case of interruption of the sensor sig­nal 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.

Table 3:

Nominal battery voltage Output voltage setting

[V] (20°C) [V]
12 12.84
24 25.68
36 38.52
48 51.36
60 64.2

Higher power requirements can be covered by paralleling
of these units. Complete microprocessor controlled sys­tems of un-interuptable power suplies (UPS) are realized
by our Applications Center. Please consult your local
Power-One representant.