Additional Resources: Product Page date 05/05/2021 page 1 of 8 SERIES: VMS-300 DESCRIPTION: AC-DC POWER SUPPLY FEATURES 2 up to 300 W continuous power 3 12.5 W/in power density universal input (90~264 Vac) 12 Vdc auxiliary fan output over voltage, short circuit, and over temperature protections built-in active PFC function efficiency up to 85% RoHS output output output ripple and efficiency MODEL 4, 5 voltage current power noise max max max min (Vdc) (A) (W) (mVp-p) (%) 2 2 VMS-300-12 12 25 300 120 82 2 2 VMS-300-15 15 20 300 150 82 2 2 VMS-300-24 24 12.5 300 240 83 2 2 VMS-300-36 36 8.33 300 360 84 2 2 VMS-300-48 48 6.25 300 480 84 3 V1 5 24 50 3 VMS-300-D0512 240 80 3 V2 12 13.33 120 3 V1 12 13.33 120 3 VMS-300-D1224 240 85 3 V2 24 6.67 240 VMS-300-12-CF 12 25 300 120 82 VMS-300-15-CF 15 20 300 150 82 VMS-300-24-CF 24 12.5 300 240 83 VMS-300-36-CF 36 8.33 300 360 84 VMS-300-48-CF 48 6.25 300 480 84 V1 5 24 50 3 VMS-300-D0512-CF 240 80 V2 12 13.33 120 V1 12 13.33 120 3 VMS-300-D1224-CF 240 85 V2 24 6.67 240 VMS-300-12-CFS 12 25 300 120 82 VMS-300-15-CFS 15 20 300 150 82 VMS-300-24-CFS 24 12.5 300 240 83 VMS-300-36-CFS 36 8.33 300 360 84 VMS-300-48-CFS 48 6.25 300 480 84 V1 5 24 50 3 VMS-300-D0512-CFS 240 80 V2 12 13.33 120 V1 12 13.33 120 3 VMS-300-D1224-CFS 240 85 V2 24 6.67 240 Notes: 1. Peak power of 600 W within 500 s only applies to single output models 2. Total continuous output power will not exceed 300 W with 25 CFM forced air, 150 W without fan. 3. Total combined continuous output power will not exceed 240 W with 25 CFM forced air, 120 W without fan. 4. Measured at 10 kHz ~ 20 MHz, with 0.1 F ceramic and 22 F electrolytic parallel capacitors 5. 1% minimum load is required to maintain the ripple and regulation (10% for dual output models) cui.comAdditional Resources: Product Page CUI Inc SERIES: VMS-300 DESCRIPTION: AC-DC POWER SUPPLY date 05/05/2021 page 2 of 8 PART NUMBER KEY VMS-300 - X XXXX - XXX - X Base Number Input/Output Connectors Output blank = terminal block/terminal block 1,3 blank = single Chasis 1 = header/header 2 D = dual blank = U-frame 2 = IEC320/terminal block Output Voltage 2,3 CF = enclosed with 3 = IEC320/header top fan Notes: 1. U-Frame & CF models 2. CFS models CFS = enclosed with 3. Header output connector not rear fan available on single 12 Vdc output models or dual output models INPUT parameter conditions/description min typ max units voltage 90 264 Vac frequency 47 63 Hz current at 90 Vac, cold start 5 A at 115 Vac, cold start 35 A inrush current at 230 Vac, cold start 70 A single output models pass EN61000-3-2 Class D -- power factor correction dual output models 0.95 leakage current at 264 Vac 0.3 mA input fuse 5 A / 250 V inserted in primary designated as INH on pin 4 of CN3, requires a low remote ON/OFF signal to inhibit output OUTPUT parameter conditions/description min typ max units single output models 1 % load regulation dual output models 5 % returns to within 1% in <2.5 ms for a 50% load transient response change and the peak transient does not exceed 5% start-up time at 230 Vac 1 s hold-up time at 120 Vac, 80% load 16 ms adjustability user adjustable 5 % PFC 50 70 kHz switching frequency PWM 65 75 kHz PWM dual output models 45 55 kHz fan drive 12 Vdc / 300 mA for external fan designated as FF on pin 3 of CN3, open collector fan fail (FF) output rated for 28 Vdc/5 mA sink current max., goes high when a fan failure is detected designated as PG on pin 1 of CN3, open collector, power good (PG) goes high 100-500 ms after DC regulation and goes low at least 1ms before loss of regulation PROTECTIONS parameter conditions/description min typ max units over voltage protection latch down and auto restart 130 % over current protection auto restart 110 140 % short circuit protection auto restart with no damage from a short on any output over temperature protection auto restart 110 C cui.com