Table 2.6 Description of the alarms (PG signal)
Alarm
Output of Alarm
PG
The PG signals are ”Low”
when the power supply oper-
ates normally.
The signals turn ”High” when
the fan stops or the power
supply stops as a result of
output voltage decrease/stop,
activation of thermal protec-
tion, overvoltage protection,
overcurrent protection func-
tions or wrong input voltage
is applied.
Open collector method
Good : L level
(0 to 0.5V at 10mA)
Bad : H level or Open
(35Vmax)
100k
W
0.1
m
F
PG / WRN
PGG / WRNG
Fig.2.4 Internal circuit of PG/WRN
¡
Please note the followings when you use the warnings (WRN sig-
nal) and the alarms (PG signal).
1
The time it takes until the WRN signals and the PG signals turn
”High” vary depending on conditions.
2
If the output voltage is turned off through a remote ON/OFF cir-
cuit, the WRN signals and the PG signals keep ”Low”.
¡
The WRN signal (Warning) circuit and the PG signal (Alarm) cir-
cuit are isolated from input, output, FG, RC and AUX.
2.11 Sequence Diagram
(1)Turn ON/OFF by Remote ON/OFF control
: Indeterminate
ON
OFF
0V
0V
NG
OK
NG
OK
AUX
AC INPUT
Events
RC
PG
WRN
300ms max
500ms max
20ms min
10ms max
100ms min
10-100ms
RC
ON
RC
OFF
1700ms max
signal inhibit
time
Output
Voltage
AC
Input
AC
Loss
Fig.2.5 Sequence time chart by Remote ON/OFF control
(2)Turn ON/OFF by AC Input / Loss
: Indeterminate
ON
OFF
0V
0V
NG
OK
NG
OK
PG
WRN
AUX
AC INPUT
RC
10ms-10S
20ms min
100ms min
1700msmax
300msmax
500ms max
10-100ms
1ms min
Output
Voltage
Events
AC
Input
AC
Loss
Fig.2.6 Sequence time chart by AC Input / Loss
AC-DC Power Supplies Enclosed Type
Instruction Manual
FETA-11
