S8AS datasheet(8/26 Pages) OMRON

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S8AS

Engineering Data

Derating Curve

Note: 1. Internal parts may occasionally be deteriorated or

damaged. Do not use the S8AS in areas outside the

derating curve (i.e., in the area shown by shading

A in the

above graph).

2. Use forced cooling if necessary to satisfy the derating curve.

3. For 480-W models, reduce the load to 80% or less for long-

term use at an input voltage of 95 VAC or less.

Abnormal Current Tripping

Standard Detection

Instantaneous Detection

Extended Detection

Tripping Performance

The S8AS detects the current of branch outputs as digital values and

numeric processing is performed to execute cutoff operations.

Refer to Abnormal Current Tripping for the tripping performance. The

following cutoff functions are also provided.

Judgment Type Selection

Standard, instantaneous, or extended can be set as the method for

detecting the tripping current. With the S8AS-24006N/48008N, only

the extended detection is supported. Refer to the S8AS User's

Manual (Cat. No. Z269) for the setting method.

Current Limit

This function is provided to limit excessive short currents, such as

those that can flow for equipment short faults.

Startup Delay

This function is provided to disable cutoff operations for 40 ms after

the branch outputs turn ON so that cutoff operations will not occur for

large inrush currents.

Safety Circuits

Temperature fuses and current fuses are provided for each branch

output to ensure safety even in the unusual event of an internal

failure.

Mounting

Note: 1. The above illustration shows a 240-W model.

2. Poor heat dissipation resulting from improper installation

conditions may occasionally deteriorate or damage internal

parts and also cause the maintenance forecast monitor

function to not operate properly. Do not use any mounting

orientation other than a standard one.

Inrush Current, Startup Time, Output Hold Time

120

100

−10 0

10203040

70 80

−20

Ambient temperature (

°C)

0.5

100

3.8

Branch output (A)

Time

(ms)

Tripping region

Setting

range

Current-

limiting by

internal

circuits

Branch output (A)

0.5

3.8

Time

(ms)

Setting

range

Tripping region

Current-

limiting by

internal

circuits

Branch output (A)

Time

(ms)

0.5

1,000

3.8

Setting

range

Current-

limiting by

internal

circuits

Tripping region

Standard Mounting

Face-up Mounting

Yrs

°C

S8AS-24006

POWER SUPPLY

-V

RS485

A(-)

B(+)

50/60Hz AC100-240V 3.8A

INPUT

Class2

OUTPUT

DC 24V 3.8A

- 5

- 4

- 3

- 2

- 1

- 6

+ 5

+ 4

+ 3

+ 2

+ 1

+ 6

V.ADJ

DC ON

COM

TMP

TRG

LFE

LOW

TRP

Startup time (3,000 ms max.)

Hold time (20 ms min.)

AC input

voltage

AC input

current

Output

voltage

Inrush current on input application

90%

96.5%

Input ON

Input OFF

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