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L-16
Switch mode Power Supply
S82K
Operation
I
Undervoltage Alarm Indicator and Output Function
(All Models Except for S82K-24024/P24024)
If the output voltage at the output terminal drops to 75% to 90% of the rated voltage, the red indicator of the S82K (DC LOW indicator) will be lit.
In the case of the S82K-
@
09024/
@
10024/24024T, a voltage drop alarm will be output via the relay available in the models (DC LOW output).
Note:
This function detects the voltage at the output terminal of the Power Supply. To check the precise output voltage, measure the voltage at the
terminal of the load.
Note: 1.
The more the voltage at the output terminal drops, the darker both the green and red indicators will be.
2.
The relay contacts have a capacity of 0.1 A at 24 VDC.
3.
The red indicator will actually first light at a voltage between 75% and 90% of the rated voltage.
Engineering Data
I
Reference Value
I
Derating Curve
3-/7.5-/15-/30-/50-/100-W Models
Single-Unit Operation
Indicator
Voltage
Operation of
@
09024/
@
10024/
24024T
’
s output (DC LOW output)
(see note 2)
If the voltage at the output terminal is more than 82% of
the rated voltage and operation is normal, the green in-
dicator will be lit and the red indicator will not be lit.
If the voltage at the output terminal drops to below 82%
of the rated voltage, the red indicator will be lit. (See
note 3.)
If the voltage at the output terminal approaches 0 V,
both the green and red indicators will not be lit.
Green:
DC ON
Red:
Green:
DC LOW
DC ON
Red:
Green:
DC LOW
DC ON
(see note 1)
Red:
DC LOW
Item
Value
Definition
Reliability (MTBF)
135,000 hrs min.
MTBF stands for Mean Time Between Failures, which is calculated according to the prob-
ability of accidental device failures, and indicates reliability of devices. Therefore, it does
not necessarily represent a life of the product.
The life expectancy indicates average operating hours under the ambient temperature of
40
°
C and a load rate of 50%. Normally this is determined by the life expectancy of the built-
in aluminum electrolytic capacitor.
Life expectancy
8 yrs. min.
65
65
90
L
Ambient temperature (
°
C)
Note:
When using the 7.5-W single-output
models within the input voltage range
between 90 and 110 VDC, the load
rate will become 90% or less.
L
Ambient temperature (
°
C)
L
Ambient temperature (
°
C)
Installation A
Installation A
Installation B
100-W Models with PFC
Parallel-Unit Operation
Installation B
Parallel-Unit Operation
100-W Models without PFC
Installation A
Installation B
S82K-P10024:
85-VAC input
S82K-03005
Installation A
S82K-P10024:
85-VAC input