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INSTALLATION
NOTE: The TRANSITION Networks 48-to-12 VDC External Power Supply is
shipped with four (4) attached feet.
1. For installation, place on any well-ventilated table-top or shelf with
access to a 48 VDC power source.
2. Connect barrel connector attached to 12 VDC cord on External Power
Supply to media converter or similar device
CAUTION: Ensure that 48 VDC power source is NOT powered when
connecting power to the 48-to-12 External Power Supply. Failure to observe
this caution could result in damage to, and subsequent failure of, the 48-to-
12 External Power Supply and of any attached device.
3. Ensure that external power source is powered OFF.
Compliance UL listed EN60950; FCC & CISPR class A; CE Mark
Dimensions 5.6" x 3.3"" x 1.6""
Power Distribution +12VDC at 0.8 A maximum.
Power Consumption 14 watts maximum
Long Term Stability 0.1% for eight (8) hours (after 20 minutes warm-up)
Efficiency 70 % (typical)
Noise and Ripple 1% peak-to-peak of output voltage (typical)
MTBF Greater than 60,000 hours with typical load operating
at 20°C ambient temperature (calculated according to
MIL-HDBK-217E)
Environment Typical Operating Temperature*: 0-50°C (32° to 122° F )
Storage Temperature: -20 to 85°C
Humidity: 10-90%, non condensing
Altitude: 0-10,000 feet
Warranty Lifetime
*At operating temperature range 50°C-70°C, operates linearly to 50% of full
rating.
DECLARATION OF CONFORMITY
Name of Mfg: Transition Networks
6475 City West Parkway, Minneapolis MN 55344 USA
Model: SPS-48V External Power Supply
Part Number: SPS-48V
Regulation: EMC Directive 89/336/EEC
Purpose: To declare that the SPS-48V to which this declaration refers is in
conformity with the following standards.
EMC-CISPR 22: 1985 Class A; EN 55022: 1988 Class A; EN 50082-1:1992;
EN 60950 A4:1997; IEC 801.2, IEC 801.3, and IEC 801.4; IEC 950
I, the undersigned, hereby declare that the equipment specified above conforms to the
above Directive(s) and Standard(s).
_May 8, 2001_____
Stephen Anderson, Vice-President of Engineering Date
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