Overload Protection; Overvoltage Protection - Omron S8FS-G Series Manual

S8FS-G
Engineering Data

Overload Protection

The load and the Power Supply are automatically protected from
overcurrent damage by this function. Overload protection is activated
if the output current rises above 105 to 160% of the rated current.
When the output current returns within the rated range overload
protection is automatically cleared.
Intermittent operation
0 50 100
Output current (%)
Note: 1. Internal parts may occasionally deteriorate or be damaged
if a short-circuited or overcurrent state continues during
operation.
2. Internal parts may possibly deteriorate or be damaged if the
Power Supply is used for applications with frequent inrush
current or overloading at the load end. Do not use the Power
Supply for such applications.

Overvoltage Protection

Consider the possibility of an overvoltage and design the system so
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails.
If an excessive voltage that is 120% of the rated voltage or more is
output, the output voltage is shut OFF.
Reset the input power by turning it OFF for at least three minutes and
then turning it back ON again.
Overheating Protection (300 W and 600 W)
If the internal temperature of the Power Supply rises excessively as a
result of fan failure or any other reason, the overheat protection circuit
will be triggered to shut OFF the output voltage.
To restore operation, turn OFF the input power supply long enough
for the Power Supply to cool sufficiently and then turn it ON again.
18
0 50 100
Output current (%)
Remote Control Function (Only Remote control)
This function is to turn ON/OFF the output by applying a voltage to the
remote control connector from a DC power Supply (external power
supply) other than this Power Supply.
Voltage between +RC and −RC (V)
Built-in
resistance Ri (Ω)
Output ON
780 4.5 to 12.5
Switch
Note 1
R
External
Inflowing current
power supply
(SELV output)
Remote control connector (CN61)
Usage example of the remote control
Connectors used:
CN61
Model B2B-XH-AM
Manufacturer
Applicable crimp tool: YC-110R (J.S.T. Mfg. Co., Ltd.) or
YRS-110 (J.S.T. Mfg. Co., Ltd.)
Note: 1. When the external power supply is 4.5 to 12.5 V, the current
limiting resistor R is not required. When it is 12.5 to 24.5 V,
insert 1.5 kΩ as the current limiting resistor R.
2. Reverse connection of the connector may cause damage
on the internal parts.
3. The +RC and -RC terminals are the secondary circuit of the
Power Supply. Use an SELV output power supply for an
external power supply. The remote control circuit is
insulated from the secondary output of the Power Supply
(functional insulation).
Reference Value
Value
Single phase model
15W: 970,000
30W: 970,000
Reliability
50W: 880,000
(MTBF)
100W: 730,000
150W: 620,000
300W: 200,000
600W: 190,000
MTBF stands for Mean Time Between
Failures, which is calculated according to the
probability of accidental device failures, and
Definition
indicates reliability of devices.
Therefore, it does not necessarily represent a
life of the product.
Life expectancy 10 yrs. Min.
The life expectancy indicates average
operating hours under the ambient
temperature of 40°C and a load rate of 50%.
Definition
Normally this is determined by the life
expectancy of the built-in aluminum electrolytic
capacitor.
Inrush current
(mA)
Output OFF
0 to 0.5 20 max.
Inside the power
supply
1
Ri
+RC
2
−RC
Applicable Applicable
connector contact
SXH-001T-P0.6
XHP-2 or
SXH-002T-P0.6
J.S.T. Mfg. Co., Ltd.