Transition Networks VDC-TO-12VDC User's Manual
Contents
1. 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 amp 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 de2. rgrenzwertklasse A In Wohnbereichen k nnen bei Betrieb dieses Ger tes Rundfunkst rungen auftreten in weichen F llen der Benutzer f r entsprechende Gegenma nahmen werantwortlich ist Attention Ceci est un produit de Classe A Dans un environment domestique ce produit risque de cr er des interf rences radio lectriques il appartiendra alors l utilsateur de prende les measures sp cifiques appropri es Trademark Notice All registered trademarks and trademarks are the property of their respective owners Copyright Restrictions 2001 TRANSITION Networks All rights reserved No part of this work may be reproduced or used in any form or by any means graphic electronic or mechanical without written permission from TRANSITION Networks Printed in the U S A 33212 A The TRANSITION Networks SPS 48V 48 to 12 VDC External Power Supply provides isolated 12 VDC output voltage from a 48 VDC external input voltage source to a media converter or similar devce 48 VDC to 12 VDC External Power Supply SPS 48V USER S GUIDE Installation 2 Maintenance 4 Technical Specifications 6 Compliance Information 8 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
3. to regulation upon removal of short No Load Operation No damage to power supply when operating at no load Overshoot Protection No voltage spike at power on power off or power failure 4 Connect 48 VDC terminal to 48 to 12 VDC External Power Supply terminal block control marked Turn terminal screw clockwise to secure 5 Connect 48 VDC terminal to 48 to 12 VDC External Power Supply terminal block control marked Turn terminal screw clockwise to secure 6 Connect ground terminal to 48 to 12 VDC External Power Supply terminal block control marked chassis ground Turn terminal screw clockwise to secure 7 Ensure that external power source is powered ON GND MAINTENANCE Replacing Power Supply Module Fuse CAUTION Wear a grounding device and observe electrostatic discharge precautions when replacing the fuse in the 48 to 12 VDC External Power Supply Failure to observe this caution could result in damage to and subsequent failure of the 48 to 12 VDC External Power Supply CAUTION Replace fuse only with same size and rating Failure to observe this caution could result in equipment damage CAUTION Ensure that power source is NOT powered when disconnecting power from or 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 1 Ensur
4. COMPLIANCE INFORMATION UL Listed C UL Listed Canada CISPR EN55022 Class A FCC Regulations This equipment has been tested and found to comply with the limits for a class A digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at the user s own expense Canadian Regulations This digital apparatus does not exceed the Class A limits for radio noise for digital apparatus set out on the radio interference regulations of the Canadian Department of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le minist re des Communications du Canada European Regulations Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Achtung Dieses ist ein Ger t der Funkst
5. claration 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 PWR RXF RXC LKF LKC TECHNICAL SPECIFICATIONS Input Input Voltage 48 VDC Inrush Current 0 20 A peak cold start Hold Up Time 20 msec minimum at full load and nominal input voltage Isolation Voltage Dielectric withstand Meets IEC 960 for one minute 1 500 VAC Output Input 500 VAC Input Safety GND 500 VAC Output Safety GND Output Output Voltage 12 VDC Output Current 0 8 A Line Regulation 0 5 of all output within specified range Load Regulation 1 0 at 20 load to full rated load Cross Regulation 1 0 maximum on any output change from 50 to 100 rated load Transient Response Output voltage returns in less than 3 msec following a 50 load change Over Load Protection OLP When the average power rating exceeds 125 150 of maximum power output voltages reduced to a safe dissipation level protects against short circuit of any output Over Voltage Protection OVP 124 8 on output Over Circuit Protection Withstands a continous short without damage returns automatically
6. e that external power source is powered OFF 2 Disconnect 48 VDC terminal from Media Conversion Center terminal block control marked by turning terminal screw counter clockwise 3 Disconnect 48 VDC terminal from Media Conversion Center terminal block control marked by turning terminal screw counter clockwise 4 Disconnect ground terminal from Media Conversion Center terminal block control marked chassis ground by turning terminal screw counter clockwise 5 Remove and retain four 4 screws that secure cover to External Power Supply 6 Carefully lift cover from External Power Supply 7 Locate fuse on 48 VDC Power Supply Module 8 Carefully remove fuse from fuse holder 9 Install same size and rating replacement fuse in fuse holder 10 Carefully slide cover onto External Power Supply 11 Replace four 4 retained screws that secure cover to External Power Supply 12 Connect 48 VDC terminal to 48 to 12 VDC External Power Supply terminal block control marked Turn terminal screw clockwise to secure 13 Connect 48 VDC terminal to 48 to 12 VDC External Power Supply terminal block control marked Turn terminal screw clockwise to secure 14 Connect ground terminal to 48 to 12 VDC External Power Supply terminal block control marked chassis ground Turn terminal screw clockwise to secure 15 Ensure that external power source is powered ON Fuse Fuse Ho
7. lder
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