Kikusui PWX750ML, User Manual

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PWX
31
Protection Functions and Alarms
Basic Functions
2
Clearing alarms
To clear alarms, (press ALM CLR (SHIFT+SET); (2) set pin 5 of the J1 connector to LOW (0
V to 0.5 V) or shorted; or (3) turn the PWX750ML off, fix the problem that caused the alarm,
and then turn the PWX series on.
If overvoltage protection 2 (OVP2) and Shutdown (SD) has been activated, turn the PWX
series off, fix the problem that caused the alarm, and then turn the PWX750ML on.
When the overheat protection (OHP), fan failure protection (FAN), or low AC input protection
(AC-FAIL) protection function is activated, output is turned off. You can use the CONFIG set-
tings to select how the PWX750ML will perform after the problem that caused the alarm is
fixed. You can select to turn the output on automatically (CF03: Auto) or to leave the output
off (CF03: SAFE). If you select to turn the output on automatically after the problem that
caused the alarm is fixed, the output will turn on automatically.
If an alarm still occurs even after you have corrected all the causes of alarms, the
PWX750ML may be malfunctioning. Stop using it immediately, and contact your Kikusui
agent or distributor.
For an explanation of the problems that cause the alarms, see the explanation of each pro-
tection function.
Alarm signal
The alarm signal is isolated from other terminals as it is through an open collector photocou-
pler.
Protection function activation
Setting limitation functions
You can use the CONFIG settings to apply limits to the voltage and current settings. You can
set limitations so that the values do not exceed the set overvoltage protection (OVP trip point)
and the set overcurrent protection (OCP trip point) and so that the values are not lower than
the set undervoltage limit (UVL trip point).
By using this feature, you can avoid turning the output off by mistakenly setting the voltage or
current to a value that exceeds the set OVP or OCP or to a value that is lower than the set
UVL.
p.42
If you have selected to limit the voltage setting (CF15: ON), you will no longer be able to set
the output voltage to a value that is 95 % of the OVP trip point or higher or to a value that is
lower than the UVL trip point. In addition, you will no longer be able to set the OVP trip point
to a value that is lower than the set output voltage or the UVL trip point to a value that
exceeds the set output voltage.
p.42
If you have selected to limit the current setting (CF14: ON), you will no longer be able to set
the output current to a value that is 95 % of the OCP trip point or higher. In addition, you will
no longer be able to set the OCP trip point to a value that is lower than the set output current.
16
3
J1 connector
ALM STATUS
STATUS COM
PWX750ML
Maximum voltage: 30 V
Maximum current: 8 mA
See
See