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PMT-24V100W1AGA Datasheet(PDF) 11 Page - Delta Electronics, Inc. |
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PMT-24V100W1AGA Datasheet(HTML) 11 Page - Delta Electronics, Inc. |
11 / 13 page TECHNICAL DATASHEET PMT Panel Mount Power Supply 24V 100W 1 Phase / PMT-24V100W1A □□ All parameters are specified at 25°C ambient unless otherwise noted. www.DeltaPSU.com (May 2013, Rev. 00) 11 Operating Mode Redundancy Operation In order to ensure proper redundancy operation for the power supply unit (PSU), ensure that the output voltage difference between the two units is kept at 0.45~0.50V for 24V supplies. Follow simple steps given below to verify: Step 1. Measure output voltage of PSU 1 and PSU 2. If PSU 1 is the master unit, then VO of PSU 1 must be higher than PSU 2. In order to set the output voltage, connect the power supply to 50% load and set the PSU 1 and PSU 2 output voltage. Step 2. Connect the right DRR module, 20A as per the system requirement to the power supply units PSU 1 and PSU 2 at Vin 1 & Vin 2 respectively. Step 3. Connect the system load from Vout. Please note that output voltage Vout from DRR module will be = VO (output voltage of power supply) – Vdrop* (in DRR module). Parallel Operation These DRR modules can also be used for Parallel function in order to increase the output power by N+1 (e.g. 2.5A + 2.5A = 5A or 2.5A + 2.5A + 2.5A = 7.5A) or current sharing, and thus increasing the power supply and system reliability. Though the PMT-24V100W1A☐☐ is not designed for current sharing, a good current sharing between two power supplies can be achieved by following simple steps as below (Refer to Fig. 3 for the Connection Diagram). *Vdrop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load current and surrounding air temperature. Fig. 3 Redundancy / Parallel Operation Connection Diagram Step 1. Set output load condition for both supplies at 50% and measure the output voltages. Step 2. Adjust output voltages to the same level or within ±25mV difference. Step 3. Connect PSU 1 and PSU 2 with the DRR-20A module and measure at Vin 1 & Vin 2 to verify the voltage difference. Ensure the voltages are within ±25mV. Step 4. Output voltage from DRR module Vout will be = VO (output voltage of power supply) – Vdrop* (in DRR module). |
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