TDK-Lambda DRF240 Série Mode D'emploi page 17

PA619-04-01B
4-10. Withstand Voltage
This series is designed to withstand 4242VDC between input
and output, 2121VDC between input and
Earth) and 500VDC between output and the
Earth) each for 1 minute. When testing withstand voltage, set
current limit of the withstand voltage test equipment to 20mA
(Output - (Protective Earth) : 100mA ). The applied
voltage must be gradually increased from zero to the testing
value and then gradually decreased for shut down. When timer
is used, the power supply may be damaged by high impulse
voltage at timer switch on and off. Connect input and output
as follows.
Input ~ Output (dotted line )
4242VDC 1min. ( 20mA )
Input ~ (Protective Earth) (solid line )
2121VDC 1min. ( 20mA )
AC(L)
AC(N)
Withstand
Voltage
Tester
COM
Output ~ (Protective Earth)
500VDC 1min. (100mA)
Withstand
Voltage
Tester
(Protective
(Protective
+
-
DC
OK
CB
CB-COM
CNT+
PV CNT-
+
AC (L)
-
AC (N)
DC
OK
CB
CB-COM
COM PV CNT- CNT+
4-11. Output Dynamic Load Response
During output dynamic load test (0%-100% load), the output
voltage level might experience a higher voltage dip of -15%
(typ).
For example, VIN = 230VAC Dynamic Load = 0% - 100%
Ta = 25degC, the output voltage level dip will be -15% (typ).
5. DC OK relay
In normal operation the DC Good relay is closed when the
output voltage is greater than 80% of nominal output voltage.
When the output is less than 80% of nominal output voltage
the relay is open.
6. Programming Voltage (PV)
The output voltage may be adjusted, between 24 – 28V, by
the application of an external programming voltage, in the
range 5-6V, to pins 7 and 8 of the signal connector (see
section 12). Please consider the following output voltage
linearity characteristic.
7. Control ON/OFF (CNT)
The power supply can be remotely switched ON by
removing the link between pins 5 and 6 of the signal
connector and taking the CNT+ (pin5) to TTL low or by
switching pin5 to pin 6 via a remote switch or relay. If the
link is removed and no TTL signal is applied the unit
remains OFF.
The CNT ON/OFF should not be abused by switching
ON/OFF the power supply too quickly. Instead, allowed a
minimum of 1 minute or longer to switch state.
TDK-Lambda
DRF240 Series
INSTRUCTION MANUAL