S8AS Datasheet, PDF (8/26 Pages) Omron Electronics LLC – Smart Power Supply

Engineering Data
Derating Curve
120
100
1
80
60
40
20
0
−20 −10 0 10 20 30 40 50 60 70 80
Ambient temperature (°C)
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
Time
(ms)
Setting
range
Tripping region
Current-
limiting by
internal
circuits
100
60
20
0.5
3.8
11 16 19
Branch output (A)
Instantaneous Detection
Time
(ms)
Setting
range
Tripping region
Current-
limiting by
internal
circuits
20
0.5
3.8
19
Branch output (A)
S8AS
Extended Detection
Time
(ms)
Setting
range
1,000
Tripping region
Current-
limiting by
internal
circuits
60
20
0.5
3.8
11 16 19
Branch output (A)
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
Standard Mounting
Face-up Mounting
S8AS-24006
POWER SUPPLY
LN
INPUT
50/60Hz AC100-240V 3.8A
A(-)
B(+)
RS485
123456
123
V A Yrs °C s
456
Class2
+V
OUTPUT
DC 24V 3.8A
-V
-V
DC ON V.ADJ
+1 +2 +3 +4 +5 +6
TRP
LOW
LFE TMP
COM
TRG
+-
-1 -2 -3 -4 -5 -6
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
Input ON
AC input
voltage
Input OFF
AC input
current
Output
voltage
Inrush current on input application
90%
96.5%
Startup time (3,000 ms max.)
Hold time (20 ms min.)
8