Engineering Data; Overload Protection; Overvoltage Protection - Omron S8TS Product Manual

Engineering Data

■ Derating Curves
Parallel Operation and Side-by-side
Mounting
120
200 V input (side-by-side mounting)
100
80
60
100/200-V input
40
(parallel operation),
100-V input (side-
20 by-side mounting)
0
20 10 0 10 20 30 40 50 55 60 70
Ambient temperature (˚C)
Note: If there is a derating problem, use forced air-cooling.
The ambient temperature is specified for a point 50 mm below the power supply.

■ Overload Protection

The Power Supply is provided with an overload protection function
that protects the load and the power supply from possible damage by
overcurrent. When the output current rises above 105% min. of the
rated current (100% min. of the rated current for parallel operation),
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.
0
Note: Do not allow the short-circuited or overcurrent state to continue
for more than 20 s, otherwise it may damage the element.
L-32
Switch Mode Power Supply
Single Operation with Spaces
between Blocks
120
100
80
60
40
20
0
20 10 0 10 20 30 40 50
50 100
Output current (%)
S8TS
20 mm min.
120
200 V input
100
100 V input
60 70
Ambient temperature (˚C)

■ Overvoltage Protection

The Power Supply is provided with an overvoltage protection function
that protects the load and the Power Supply from possible damage
by overvoltage. When an excessive voltage is output, the output volt-
age is shut OFF. Reset the Power Supply by turning it OFF for at
least 1 minute and then turning it back ON again.
24-V Models
Rated output
voltage
12-V and 5-V Models
Rated output
voltage
Note: Do not turn ON the power again until the cause of the overvolt-
age has been removed.
N+1 Redundant System
80
60
40
20
0
20 10 0 10 20 30 40 50 60 70
Ambient temperature (˚C)
Overvoltage
protection
operating
28 V
Variable range
22 V
0 V
Overvoltage
protection
operating
+10%
Variable range
–10%
0 V