S8AS Datasheet, PDF (9/26 Pages) Omron Electronics LLC – Smart Power Supply

S8AS
Functions
Functions
Alarm
Abnormal voltage tripping
Abnormal current tripping
Abnormal total current tripping (240-W models only)
Undervoltage detection
Maintenance forecast monitor
Overheating alarm
Over-temperature
Alarm output
TRP output: OFF (normally ON)
TRP output: OFF (normally ON)
TRP output: OFF (normally ON)
LOW output: OFF (normally ON)
LFE output: OFF (normally ON)
LFE output: OFF (normally ON)
TMP output: OFF (normally ON)
Output status
All branch outputs cut off.
Relevant branch output cut off.
All branch outputs cut off.
ON
ON
ON
ON
Alarm display
A10
A11
A12
A21
A23
A23/HOT
A30
Tripping Functions
Function
Operation
Abnormal
The output voltage is monitored and all branch outputs are cut off if the detection voltage is reached. Notification of the status
voltage tripping is provided using the alarm display and the tripping alarm output (TRP).
Refer to Chart 1. The alarm display will alternate between the voltage and the alarm code (A10).
*1, *2, *3
Detection voltage: 28.8 V (fixed)
The output current is monitored and the branch output that is abnormal is cut off if the preset current is reached.
Notification of the status is provided using the alarm display and the tripping alarm output (TRP).
The alarm display will alternate between the current and the alarm code (A11).
Setting range: 0.5 to 3.8 A (in 0.1-A increments). The S8AS-24006N and S8AS-48008N are set to 3.8 A. (Cannot be changed.)
Abnormal
One of the following three abnormal current tripping types can be set. With the S8AS-24006N/48008N, only the standard
current tripping detection is supported.
Refer to Chart 2. Standard Detection: Tripping within 100 ms. (Abnormal current will be detected and the output will be cut off within 20 ms if
*1, *2
current continuously exceeds the set value for more than 80 ms.)
Instantaneous Detection: Tripping within 20 ms. (Abnormal current will be detected and the output will be cut off within 10 ms
if current continuously exceeds the set value for more than 10 ms.)
Extended Detection: Tripping within 1,000 ms. (Abnormal current will be detected and the output will be cut off within 20 ms
if current continuously exceeds the set value for more than 980 ms.)
Abnormal total
current tripping
*1, *2
Using the abnormal total current tripping function, the S8AS monitors the total output current and when the total output current
exceeds the set value, all branch outputs are cut off. Notification of the status is provided using the alarm display and the
tripping alarm output (TRP). The error code A12 will be shown on the display. There are a number of conditions for the tripping
current and time. If even one of these conditions is detected, the abnormal total current tripping function will be activated.
240 W: Branch outputs are cut off when the total output current is more than 17 A for 2 s, 15 A for 5 s, 13 A for 10 s, or 12 A
for 20 s.
480 W: Branch outputs are cut off when the total output current is more than 27 A for 1 s, 25 A for 2 s, or 22.5 A for 5 s.
External tripping
input
*1
The output can be cut off by inputting a voltage to the external tripping input (TRG terminal). If a shutdown sequence has been
set, outputs will be cut off according to the shutdown sequence.
Each branch output can be enabled or disabled individually. On the S8AS-24006N/S8AS-48008N, all branch outputs are
enabled. (Cannot be changed.)
External input signal width: 10 ms min.
Input signal levels
High level: 19.2 to 30 VDC
Low level: 0 to 2.5 VDC
Tripping can also be performed by using communications (S8AS-24006R/S8AS-48008R only).
Refer to the S8AS User's Manual (Cat. No. Z269) for information on tripping using communications.
Note: Three abnormal current tripping types with different tripping current characteristics are supported: standard detection, instantaneous
detection, and extended detection. Select the required tripping type.
*1. Outputs are cut off using semiconductor relays and electrical insulation is not provided.
*2. With the default settings, the alarm display and alarm output can be cleared using one of the following methods.
• Clear using the reset operation.
• Clear by turning the supply power OFF and ON again.
*3. The voltage detection is performed on the voltage after AC/DC conversion in the internal circuits. The displayed voltage will be somewhat
different from the value at the output terminals of the power source due to internal voltage drop. To confirm correct output voltages, measure
the voltages at the branch output terminals.
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