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