117
Appendix A
Glossary
The following table lists terms related to the S8AS Smart Power Supply and a brief description of the terms. For
details, see the referenced page.
Term Meaning Page
abnormal current tripping If a branch output's current exceeds the set value, that output is cut off. The
tripping threshold can be set between 0.5 and 3.8 A. The seven-segment dis-
play will show error code A11 and the Alarm Output (TRP) photoswitch output
turns OFF when the output is cut off.
4, 30,
50, 61
abnormal voltage tripping If the output voltage exceeds 28.8 VDC, all of the branch outputs will be cut off
immediately. The seven-segment display will show error code A10 and the
Alarm Output (TRP) photoswitch output turns OFF when the outputs are cut off.
It is not necessary to set parameters for this function.
29, 50
alarm tripping output The branch output is cutoff and Alarm Output (TRP) photoswitch output turns
OFF when the S8AS detects an abnormal current or voltage.
6, 50
branch output A branch output is one of the S8AS's 24-VDC outputs. The 240-W models have
6 branch outputs, and the 480-W models have 8 branch outputs.
3, 16, 48
current fuse When a branch output could not be cut off by the semiconductor relay, a current
fuse will blow to protect the circuit. If the fuse blows, that branch output will
become unusable.
34
cut off A branch output will be cut off if the S8AS detects an abnormal current or volt-
age or if an external tripping signal is received.
11
DIN Rail Used to install the S8AS. 45
external tripping input Branch outputs can be forcibly cut off with an input to the External Tripping
Input (TRG terminal). The shutdown sequence function will operate in this
case.
6, 39,
50, 69
instantaneous detection
(alarm type and tripping type)
Each branch output's tripping current and abnormal current can be detected
with standard detection (tripping within 100 ms), instantaneous detection (trip-
ping within 20 ms), or extended detection (tripping within 1,000 ms). With
instantaneous detection, the output will be cut off within 20 ms if the current is
higher than the tripping threshold continuously for 10 ms or longer.
4, 30, 62
LFE An external output terminal. LFE is an abbreviation for “life.” The photoswitch
output turns OFF when the maintenance forecast monitor function is activated.
12, 17,
50
LOW An external output terminal. The photoswitch output turns OFF if the undervolt-
age detection output is activated.
12, 17,
50
extended detection (alarm
type and tripping type)
Each branch output's tripping current and abnormal current can be detected
with standard detection (tripping within 100 ms), instantaneous detection (trip-
ping within 20 ms) or extended detection (tripping within 1,000 ms). With
extended detection, the output will be cut off within 20 ms if the current is higher
than the tripping threshold continuously for 980 ms or longer.
4, 30, 62
operating mode There are three operating modes in the S8AS: Run Mode, Setting Mode, and
Test Mode.
The operating mode cannot be changed to Setting Mode for models that do not
permit setting changes (S8AS-24006N/48008N).
7, 84
over-temperature output The S8AS has a built-in temperature sensor that monitors the internal tempera-
ture. The Over-temperature Output (TMP) photoswitch output will turn OFF if
the internal temperature exceeds the set value.
6, 35,
50, 65
parameter initialization Parameter Initialization is used to return all parameters to their default settings. 58
peak output current The peak output current for each branch outputs can be read in Run Mode. The
peak output currents can be cleared using S8AS key operations or from the
Support Tool.
84
protection level The protection level can be set to one of three levels to restrict read/write
access to the parameters. This function can be used to prevent parameters
from being changed or deleted inadvertently. The default protection level is
level 1.
6, 59
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