PMC-24V300W1BA Datasheet, PDF (14/14 Pages) Delta Electronics, Inc. – 24V 300W 1 Phase

Panel Mount Power Supply
Technical Information
PMC-24V300W1BA
Parallel Operation:
When 2 power supplies are also connected in the above manner they can share the Load provided
following steps are taken.
Step 1:
Measure the o/p voltages @ NL measured from A1 to Gnd i.e. VA1 to Gnd of PSU1 and VA2 to Gnd
of PSU2. If the voltages are not same follow step 2, if the o/p voltages are same skip step 2 and
move to step 3.
Step 2:
Adjust the o/p voltages with the help of VR available on the front panel of the PSU marked as
ADJUST for both PSU1 and PSU2 at the same level for e.g. if PSU1 o/p is measuring 24.15Vdc and
PSU2 is measuring 24.25Vdc adjust the o/p voltage of either PSU1 close to 24.25Vdc or adjust the
o/p voltage of PSU2 close to 24.15Vdc.
Step 3:
Connect the PSU to the end system load and measure the o/p voltages from A1 to Gnd i.e. VA1 to
Gnd of PSU1 and VA2 to Gnd of PSU2. Ensure that o/p voltages are same even after the 2 power
supplies are connected to load. If not then adjust them with the VR available on Front panel. A
tolerance of + 25mV would be acceptable.
Note:
1. If the o/p voltage of any 1 power supply i.e. PSU1 or PSU2 is higher that power supply will take
the initial load and also share the maximum load.
2. If the o/p voltages adjusted are same then an equal load current sharing between the 2 power
supplies can be achieved.
3. The Oring diode must be of an appropriate rating, recommended rating of Oring Diode is
minimum 4 times of the output load current and minimum reverse voltage rating of 45Vrr.
4. A suitable HS is also advised to ensure that oring Diode is not over heated and damaged.
14/14
3/21/2011
Rev: 01,