Additional Resources: Product Page 3D Model date 04/22/2021 page 1 of 5 SERIES: VF-S320-XXA DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 320 W continuous power w/ 22 CFM forced air 700 W peak power within 500 s duty duration passive power factor correction power good signal 3,000 Vac isolation voltage over load, over voltage, over temperature, and short circuit protections UL/EN/IEC 62368 certified efficiency up to 83% RoHS output output output ripple and efficiency MODEL 1 3,4 voltage current power noise max w/ max w/ 2 2 max airflow max airflow max typ (Vdc) (A) (A) (W) (W) (mVp-p) (%) VF-S320-05A 5 27.28 45 136 225 50 75% VF-S320-09A 9 16.37 29.1 147 262 90 83% VF-S320-12A 12 15 26.67 180 320 120 80% VF-S320-15A 15 12 21.33 180 320 150 83% VF-S320-18A 18 10 17.78 180 320 180 83% VF-S320-24A 24 7.5 13.33 180 320 240 83% VF-S320-28A 28 6.43 11.43 180 320 280 83% VF-S320-36A 36 5 8.89 180 320 360 83% VF-S320-48A 48 3.75 6.67 180 320 480 83% VF-S320-54A 54 3.33 5.93 180 320 540 83% Notes: 1. Maximum power must not exceed 180 W with convection cooling or 320 W for forced air. 2. With external 22 CFM fan. 3. 1% minimum load is required to maintain the ripple and regulation. 4. Ripple and noise is measured from 10 KHz to 20 MHz at output terminals with a 0.1 F ceramic capacitor and a 22 F electrolytic capacitor in parallel. PART NUMBER KEY VF - S320 - XX A - X Base Number Output Voltage Input/Output connector: blank = Terminal block input / Terminal block output 1 = Molex input / Molex output 2 = Molex input / Terminal block output 3 = Terminal block input / Molex output cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VF-S320-XXA DESCRIPTION: AC-DC POWER SUPPLY date 04/22/2021 page 2 of 5 INPUT parameter conditions/description min typ max units voltage 90-132/180-264 auto selectable 90/180 132/264 Vac frequency 47 63 Hz at 100~120 Vac, cold start 6 A current at 200~240 Vac, cold start 3 A at 115 Vac, cold start 35 A inrush current at 230 Vac, cold start 70 A power factor Compliant to EN 61000-3-2 class A OUTPUT parameter conditions/description min typ max units line regulation low line to high line 1 % load regulation all other outputs 1 % temperature coefficient 0.25 mV/C Output voltage returns to within 1% in less than 2.5 ms for a 50% load change. transient response Peak transient does not exceed 5%. start-up time At 120 Vac 1 s rise time 0.2 20 ms hold-up time At 120 Vac and 80% of rated maximim load 20 ms adjustability 5 % Designated as PG on the CN3. power good This signal goes TTL high 100-500 ms after the output reaches regulation. It goes low at least 1 mS before loss of regulation. fan drive 12 Vdc / 400 mA for external fan PROTECTIONS parameter conditions/description min typ max units over voltage protection AC input needs to be reset to restart the power supply. 130 % over current protection automatically recovers 110 140 short circuit protection short circuit can be continuous, recovers automatically upon removal of short over temperature protection auto recovery 85 C SAFETY & COMPLIANCE parameter conditions/description min typ max units applied for 3 seconds at 10 mA max. primary to secondary 3,000 Vac isolation voltage primary to transformer core 1,500 Vac primary to earth chassis 1,500 Vac safety approvals certified to 62368: IEC, EN, UL EMI/EMC pass FCC Part 15, CISPR 22 class B, conducted at 240 Vac 500 A leakage current at 120 Vac 300 A RoHS compliant yes MTBF according to MIL-HDBK-217 at 30 C 100,000 hrs cui.com