765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
765432121098765432109876543210987654321
All specifications are typical at nominal line and full load at 25°C unless
otherwise noted and are subject to change without notice.
ENVIRONMENTAL
OUTPUT
INPUT
GENERAL
Voltage Tolerance
Ripple and Noise (PARD)
Operating Temperature
Storage Temperature
Cooling
Short Circuit Protection
Temperature Coefficient
Voltage Range
Voltage Frequency
I/O Isolation
AC Leakage Current
UL 544 Series
-25°C to +71°C-No Derating
-25°C to +85°C
Free-air Convection
± 1%
1mV RMS
(CMW,PW,PAW)
7 mV RMS
(EAW,ECW,ESW)
Current Limiting
(CMW,PW,PAW)
Power Foldback
(EAW,ECW,ESW)
0.02% / °C
105-125 Vac
50 to 440 Hz
2500 Vac
10µA
High voltage breakdown and low
leakage current make these units
ideally suited for medical and patient
contact applications. Portable ultra-
sound scanners, electrocardiograph
monitoring systems and microproces-
sor controlled blood analyzers are just
a few of the many applications utilizing
UL 544 units. Although Underwriters
Laboratories maintains strict require-
ments to ensure the safety of such
equipment, UL 544 recognized units
are not limited to these applications.
These units are also being incorporated
in computer interface systems, copy-
ing machines (color analysis), and
other applications requiring a high
degree of isolation.
Applications
he UL 544 Series product listed
have met the stringent require
ments for Patient Contact rating
as defined by Underwriters Laborato-
ries, Inc., under UL544; STANDARD for
SAFETY - MEDICAL and DENTAL
EQUIPMENT. All models are recog-
nized and listed accordingly under File
E50975 of the U.L. Component Recog-
nition Program. These units are based
upon standard reliable product families
which are specifically modified to meet
the severe demands of UL 544. All
models utilize a Faraday shielded
power transformer which holds leakage
at 10µA maximum. Effective isolation
techniques give these units a higher
than required voltage breakdown rating
of 2500 Vac (min).
T
Medical Approved
Patient contact rated
2500 Vac breakdown
Faraday shielded
transformers
67