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

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:

DC LOW

Green:

DC ON

Red:

DC LOW

(see note 1)

Green:

DC ON

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.

Life expectancy

8 yrs. min.

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.

65

65

90

Ambient temperature (

°C)

3-/7.5-/15-/30-/50-/100-W Models

Ambient temperature (

°C)

Ambient temperature (

°C)

Installation A

Installation A

Installation B

100-W Models with PFC

Installation B

Parallel-Unit Operation

100-W Models without PFC

Installation A

Installation B

Single-Unit Operation

Parallel-Unit Operation

S82K-P10024:

85-VAC input

S82K-03005

Installation A

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.

S82K-P10024:

85-VAC input