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Basic Function Details Section 2-4
2-4-2 Over-current Protection Functions
Abnormal Current
Tripping Function
When an abnormal current is detected, the S8AS cuts off the branch outputs
via semiconductor relays.
Each branch output's tripping current can be set between 0.5 and 3.8 A (in
0.1-A increments).
One of the following three detection methods can be selected for each branch
in order to detect abnormal currents (except for the S8AS-24006N/48008N,
which always use the same detection method.)
• Standard detection (tripping within 100 ms)
• Instantaneous detection (tripping within 20 ms)
• Extended time detection (tripping within 1,000 ms)
(V-U) +0.3 V
V-U: Undervoltage
detection threshold
Undervoltage detection output (LOW)
100 ms
500 ms
Power
supply
voltage
Reset possible
Connected
Not connected
Connected
Reset signal
Undervoltage
alarm output (LOW)
Branch output
voltage
Undervoltage
detection threshold
Branch output
current
Power supply
voltage
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