cui .com date 10/26/2011 page 1 of 4 series: vms-20 description: ac-dc power supply model output voltage output current output power ripple and noise 1 ef ciency (vdc) max (a) max (w) max (mvp-p) typ (%) vms-20-3.3 3.3 4.0 13.2 50 75 vms-20-5 5 4.0 20.0 50 80 vms-20-9 9 2.3 20.7 90 81 vms-20-12 12 1.7 20.4 100 83 vms-20-15 15 1.4 21.0 100 84 VMS-20-24 24 0.9 21.6 100 85 notes: 1. measured at 20mhz, with 0.1uf ceramic and 10uf electrolytic capacitors part number key vms-20 - xx base number output voltage features ? up to 21.6 w continuous power ? compact size ? universal input (90 ~ 264 vac) ? single output from 3.3 to 24 v ? no load power < 0.3w ? over voltage and short circuit protections ? full medical safety approvals ? efficiency up to 85% rohs
date 10/26/2011 page 2 of 4 cui .com cui inc series: vms-20 description: ac-dc power supply input parameter conditions/description min typ max units voltage 90 264 vac frequency 47 63 hz input current 0.5 a inrush current at 230 vac, cold start at 25 c 40 a output parameter conditions/description min typ max units line regulation low line to high line, full load 0.5 % load regulation 10% to 100% full load 1 % hold-up time 115 vac 10 ms switching frequency 100 khz protections parameter conditions/description min typ max units over voltage protection 115 140 % short circuit protection continuous safety & compliance parameter conditions/description min typ max units isolation voltage input to output 5,656 vdc safety approvals ul60601-1, iec60601-1, en60601-1 emi/emc en60601-1/en61204-3/en55022/cispr class b, en55024 leakage current 0.1 ma rohs compliant yes mtbf mil-hdbk-217f, gb 400,000 hrs environmental parameter conditions/description min typ max units operating temperature see derating curve -25 70 c storage temperature -40 85 c operating humidity non-condensing 93 % mechanical parameter conditions/description min typ max units dimensions 2.38 x 1.60 x 0.80 (60.5 x 40.6 x 20.4 mm) inch weight 50 g cooling method free air convection (see derating curves below)
date 10/26/2011 page 3 of 4 cui .com cui inc series: vms-20 description: ac-dc power supply 60.5 2.38 40.6 1.60 3.40 0.134 1.80 0.071 1.00 0.039 3.80 0.150 2.00 0.079 max 17.00 0.669 20.40 0.803 max 10.32 0.406 30.32 1.194 3.06 0.120 20.32 0.800 2.82 0.111 54.00 2.126 +vo acn acl -vo mechanical drawing units: mm[in] tolerance: mm: x.x = 0.5 ; x.xx = 0.25 inch: x.xx = 0.02 ; x.xxx = 0.01 100 80 60 40 20 ambient temperature (c) load (%) -20 0 10203040506070 -30 derating curves output power vs. ambient temperature (natural convection)
cui offers a two (2) year limited warranty. complete warranty information is listed on our website. cui reserves the right to make changes to the product at any time without notice. information provided by cui is believed to b e accurate and reliable. however, no responsibility is assumed by cui for its use, nor for any infringements of patents or other rights of third parties which may result from its use . cui products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. headquarters 20050 sw 112th ave. tualatin, or 97062 800.275.4899 fax 503.612.2383 cui .com techsupport@cui.com date 10/26/2011 page 4 of 4 cui inc series: vms-20 description: ac-dc power supply rev. description date 1.0 initial release 10/26/2011 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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