Overload Protection; Overvoltage Protection - Omron S8JX Datasheet

Overload Protection

The Power Supply is provided with an overload protection function
that protects the power supply from possible damage by overcurrent.
When the output current rises above 105% min. of the rated current,
the protection function is triggered, decreasing the output voltage.
When the output current falls within the rated range, the overload
protection function is automatically cleared.
(Reference value)
15-/35-/50-/100-/150-W Models
Intermittent operation
0 50 100
Load rate (%)
300-W Model
Intermittent operation
0 50 100
Load rate (%)
600-W Model
0 50 100
Load rate (%)
If an excessive current flows for 5 s or more, the output will be turned
OFF and simultaneously the protection-ON alarm indicator will be lit.
To reset the S8JX, turn OFF the power, leave the S8JX for at least
three minutes, and then turn it ON again.
Note: 1. When a load is connected that has a built-in DC-DC
converter, the overload protection may operate at startup
and the power supply may not start.
2. Internal parts may occasionally deteriorate or be damaged
if a short-circuited or overcurrent state continues during
operation.
3. 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.
Output interrupted

Overvoltage Protection

15-/35-/50-/100-/150-W Models
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. When an excessive voltage
that is approximately 130% of the rated voltage or more is output, the
output voltage is shut OFF, preventing damage to the load due to
overvoltage. Reset the input power by turning it OFF for at least seven
minutes and then turning it back ON again.
300-/600-W Models
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. When an excessive voltage
that is approximately 130% of the rated voltage or more is output, the
output voltage is shut OFF, preventing damage to the load due to
overvoltage. Reset the input power by turning it OFF for at least seven
minute and then turning it back ON again.
(Reference value)
Overvoltage protection
Operating
Rated output
Voltage
Variable range
0 V
Note: Do not turn ON the power again until the cause of the
overvoltage has been removed.
Overheat Protection
600-W Model
If the internal temperature rises excessively as a result of fan failure
or any other reason, the overheat protection circuit will be triggered to
protect the internal parts and simultaneously the protection-ON alarm
indicator will be lit. Reset the input power by turning it OFF for at least
three minutes and then turning it back ON again.
Inrush Current, Startup Time, Output Hold Time
Input ON
AC input
voltage
Inrush current on input application
AC input
current
Output
voltage
Startup time
Note: A maximum startup time of 500 ms is required. Construct a
system configuration that considers the startup time of other
devices.
S8JX
Input OFF
96.5%
90%
Hold time (20 ms min.)
11