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300W Power Supply
Catalog Number: 991625 0024
LOAD SHARING
Parallel operation is achieved by simply paralleling the “Load
Share” terminals. No adjustments are required. The total load
current will be split evenly among the power supplies. “Hotswapping” is possible as well. The voltage output of each power
supply must be within 2V of each other. Load sharing will only
work with a minimum 0.5A load applied to each power supply in
the system.
Up to 5 units can be connected in parallel to share the current
(1500W). Please consult factory if your require higher power.
FAULT RELAY
Form “C” Relay that energizes during normal operating conditions.
Contacts are rated for 30Vdc at 1A or 125Vac at 1A maximum.
300W Power Supply Temperature Derating and Mounting
This power supply can be horizontally (Figure 1) or vertically (Figure 2) mounted. For vertical mounting make sure the power supply is
mounted as per Figure 2 with the internal fan air flow as indicated.
Amperage
9916250024 Horizontal Rail
14 12.5
12
10
8
6
4
2
00
10
12.5
12.5 12.5 12.5
10
Figure 1:Horizontal Mount
0
20
30
40
50
60
80
70
Temperature (Degrees Celsius)
Amperage
9916250024 Vertical Rail
14
12
10
8
6
4
2
0
12.5
12.5
12.5.
Direction of Air Flow
12.5
10.5
8.5
0
Temperature (Degrees Celsius)
Figure 2:Vertical Mount
Specifications subject to change without notice. Printed in Canada 99990158 10/02
300W Power Supply
Catalog Number: 991625 0024
Input: 85-265Vac, 50/60Hz.
100-200Vdc, L= +, N= Active PFC (.99 power factor under all load conditions)
Output: 22-28Vdc, (300W max. continuous)
20mVac RMS max. ripple @ 120Hz
2mVac p-p max. ripple @ 100KHz
DC ON - Green LED
This LED indicates that the power supply is operating within acceptable parameters.
CURRENT LIMIT - Yellow LED
This LED will illuminate if the output current exceeds 13.5A. The supply will deliver 18A for 300mS, with an ouput voltage of 24Vdc. Above
18A and around 300mS the output voltage will drop until the undervoltage threshold is exceeded. In this mode the supply will shut down
and auto-restart.
FAULT - Red LED
This LED is not illuminated under normal operating conditions. If it turns on, one of the following faults has occurred:
• Dead short circuit.
• Output voltage has exceeded 30Vdc (overvoltage)
• Output voltage has gone below 15Vdc (undervoltage)
• The internal heatsink temperature has exceeded 100ºC.
When illuminated the output voltage drops to zero and the Fault Relay de-energizes. In order to reset the fault condition the power must
be removed from the power supply until the fault LED turns off (approx. 10 seconds).
ANALOG OUTPUTS - Monitor V, T, I
•
•
•
•
•
•
•
Span 0-10Vdc
Voltage output 0-30V
Temperature output 0-100ºC
Current output 0-15A
Accuracy ±3% worst case over full span and temperature range
Output impedance 2K
Permanent short circuit protected.
Weidmuller Ltd.
10 Spy Court
Markham, ON L3R 5H6
Canada
Phone: 905-475-1507
Fax: 905-475-5855
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