Omron S8AS User Manual page 50

Basic Function Details
Current Tripping Characteristics
32
■
Standard Detection
Time (ms)
Setting
range
100
60
20
0.5
■
Instantaneous Detection
Time (ms)
Setting
range
20
0.5
■
Extended Detection
Time (ms)
Setting
range
1,000
60
20
0.5
Note The S8AS contains a current-restricting circuit that prevents a cur-
rent above a specific value from flowing. The current is thus restrict-
ed during the time required to cut off the output.
Note After sampling and converting each branch output's current every 1 ms, the
S8AS processes the values in the CPU and controls the branch output cut-
offs. This method achieves high-speed, high-accuracy tripping. In addition, to
minimize the effects of excessive currents caused by short-circuits, the S8AS
is equipped with built-in current-limiting circuits. Consequently, there is a
Tripping region
16 19
3.8 11
Tripping region
19
3.8
Tripping region
Current-
limiting
by internal
circuits
19
16
3.8
11
Section 2-4
Tolerance of current trip-
ping alarm threshold:
±0.3 A. When the trip-
Current-
ping current (0.5 to
limiting
by internal
3.8 A) is detected, it is
circuits
cut off within 100 ms.
Current (A)
Tolerance of current trip-
ping alarm threshold:
±0.3 A. When the trip-
Current-
ping current (0.5 to
limiting
3.8 A) is detected, it is
by internal
cut off within 20 ms.
circuits
Current (A)
Tolerance of current trip-
ping alarm threshold:
±0.3 A.When the trip-
ping current (0.5 to
3.8 A) is detected, it is
cut off within 1,000 ms.
Current (A)