Additional Resources: Product Page 3D Model date 04/23/2021 page 1 of 7 SERIES: VMS-550 DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 550 W continuous power -40C to 70C operating temperature industry standard foot print 3 x 5 low profile 1.5 power factor correction 12 V/0.5 A fan output standby power <0.5 W efficiency up to 92% long life electrolytic capacitors complying with the latest EMI standard th IEC 60601-1-2:2014 (4 edition) output output output ripple efficiency MODEL 1,2 3,4 voltage current power and noise max max max typ (Vdc) (A) (W) (mVp-p) (%) VMS-550-12 12 41.67 500 240 90 VMS-550-15 15 33.33 500 300 90 VMS-550-24 24 22.92 550 240 91 VMS-550-30 30 18.33 550 300 91 VMS-550-48 48 11.46 550 480 92 VMS-550-58 58 9.48 550 580 92 Notes: 1. Maximum output power with 21 CFM forced air cooling. See derating curves for full performance details. 2. Combined output power of main output and fan supply shall not exceed the max power rating. 3. Ripple is peak to peak with 20 MHz bandwidth and 10 F tantalum capacitor in parallel with a 0.1 F capacitor at rated line voltage and load ranges. 4. Output ripple can be more than 10% of the output voltage at -40C. 5. All specifications are measured at Ta=25C, nominal input voltage, and rated output load unless otherwise specified. PART NUMBER KEY VMS-550 - XX Base Number Output Voltage cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VMS-550 DESCRIPTION: AC-DC POWER SUPPLY date 04/23/2021 page 2 of 7 INPUT parameter conditions/description min typ max units voltage 90 264 Vac frequency 47 63 Hz at 115 Vac, full load 6 A current at 230 Vac, full load 3 A inrush current at 230 Vac, cold start 45 A at 115 Vac 0.2 mA leakage current at 230 Vac 0.4 mA touch current 0.1 mA power factor at full load 0.95 no load power consumption 0.7 W input fuse 8 A/250 V time delay fuse (included) OUTPUT parameter conditions/description min typ max units initial set point accuracy 1 % line regulation 0.5 % load regulation from 100% to 10% load 1 % start-up delay time 2 s rise time at 115/230 Vac 55 ms hold-up time at 115/230 Vac, full load 16 ms adjustability built in trim pot 3 % switching frequency 50 300 kHz 25% step load change, at 0.1 A/S slew rate, 50% transient response duty cycle, 50/60 Hz, max excursion 4%, recovery time 5 ms temperature coefficient at 0~50C 0.05 %/C 1 fan output 12 Vdc / 500 mA Notes: 1. Fan supply output voltage tolerance including set point accuracy, line and load regulation is 10% and ripple and noise is less than 10%. PROTECTIONS parameter conditions/description min typ max units over voltage protection hiccup, auto recovery 110 140 % over current protection hiccup, auto recovery 110 % short circuit protection hiccup, auto recovery goes into hiccup mode when the temperature of over temperature protection the PCB exceeds 11010C, auto recovery SAFETY & COMPLIANCE parameter conditions/description min typ max units input to output (2 x MOPP) 4,200 Vac isolation voltage input to ground (1 x MOPP) 1,500 Vac output to ground 1,500 Vac IEC 60601-1: 2005 +CORR1:2006 +CORR2:2007 +AM1:2012, EN 60601-1:2006 +A11:2011 +A1:2013, ANSI/AAMI ES 60601-1 safety approvals (2005+CI:09+A2:10), AMD1:2012 CAN/CSA- C22.2 No 60601-1 (2008) 60601-1:14 ISO 14971, 2nd edition complies with LVD directive safety class class I Notes: 2. The power supply is considered a component which will be installed into final equipment. The final equipment still must be tested to meet the necessary EMC directiv es. cui.com