DC/DC Converter
PSC30
User Manual
Page 18 (24)
©2009. ELTEK VALERE DEUTSCHLAND GmbH.
UM_PSC30_E_EVD_2011-01-19.doc
6)
At active current sharing mode of paralled units, pin 4 (DC - Output) of each module has to be con-
nected together. The BUS – GND (pin 5) has to be connected too.
ATTENTION!
You can use either version
6)
or
3)
of wiring for active current sharing mode, not both in combina-
tion!
8. Maintenance
In general the SMPS of type PSC is maintenance free. At operation in dusty rooms you have to check
the dust within the module once a year. You can blow out the module with dry compressed air.
Attention:
Dust can reduce the cooling and in combination with dew and water short circuits at in-
ternal circuits are possible.
9. Trouble
shooting
Only skilled and trained technical personnel should carry out all necessary operations at the unit.
9.1
No output voltage
- Is the DC input voltage present?
- Is the DC input switch in on-position?
- Is the input plug correctly connected?
- Is the polarity correct or short circuit at the output?
- Paralleled units: incorrect polarity at external decoupling diodes?
- Monitoring of output voltage high V> signalize an error (lights LED V>?)
→
switch the unit off and on again and check the adjusted value of V> (see section 5.4)!
If the module still does not work even though all checks have been done, contact your sales agent
or the ELTEK VALERE DEUTSCHLAND service department.
9.2
Deviation of output voltage
- Operates the module in constant current mode (overload)?
→
Reduce the load!
- Adjustment of output voltage value VO wrong?
→
Adjust the output voltage to nominal values (see section 5.4)!
- Cable break at external sense links?
- Voltage losses at decoupling diodes on output side?
→
adjust the output voltage to higher level or use sense links!
If the module still does not work even though all checks have been done, contact your sales agent
or the ELTEK VALERE DEUTSCHLAND service department.
