Tài liệu Fiber Loop Converter (FLC) Powering doc

Application Note 1212 ® Telecommunications This application note addresses the various powering options for the Quad Fiber Loop Converter (QFLC) and DS3 Fiber Loop Converter (DS3 FLC). Housing The ADC Quad Fiber Loop Converter (QFLC) and DS3 Fiber Loop Converter (DS3 FLC) modules can be housed in either the eight position chassis or the four position wall mount chassis. Each module also fits into a specially designed two position horizontal chassis. All these chassis use a different powering arrangement. Module Current Specifications Both the QFLC and the DS3 FLC require -48 Vdc power. Specific current requirements depend on the application. The typical current draw for a QFLC is 250 mA. If the QFLC provides four lines of simplex current, the typical supply current increases to 490 mA. The DS3 FLC, which does not provide simplex current, typically draws 200 mA, with a maximum current draw of 250 mA. Table 1 provides a summary of current requirements for the two modules. Overview Table 1: FLC Module Current Specifications Module QFLC DS3 FLC Application Online, no simplex current provided Standby, no simplex current provided Online, simplex current provided Standby, simplex current provided Online Standby Typical Current per Module 250 mA 170 mA 490 mA 170 mA 200 mA 200 mA Maximum Current per Module 336 mA 256 mA 600 mA 256 mA 250 mA 250 mA Fiber Loop Converter (FLC) Powering 2 Application Note 1212 Powering Options Following are suggested powering methods for the three QFLC/DS3 FLC chassis. 8 Position Chassis ADC provides the eight position chassis without a separate power supply. Generally, the eight position chassis is wired directly to the central office -48 Vdc power supply. If the application requires an AC/DC converter, ADC offers MZ12CAB, an AC/DC rectifier cabinet, and MZ2A50, a 2 amp AC/DC rectifier module. The rectifier cabinet holds up to five rectifier modules, for a total of 10 amps of supply current. Each FLC application will require a different number of AC/DC rectifier modules depending on the current draw of that application. 4 Position Chassis ADC provides the four position wall mount chassis with two different powering options. FWM-xxA04A* is the four position chassis with dual/redundant AC/DC converters housed within the chassis. This option allows the chassis to convert 110 VAC current to the required -48 Vdc. Redundancy ensures continued service should one of the power supplies fail. If the application calls for battery backup with the four position wall mount chassis, ADC recommends FWM-xxDO4B,* a four position chassis with a separate wall-mount Lorain/ Reliance Comm/Tec five amp AC/DC converter and battery backup system. The five amp AC/DC rectifier and battery backup system converts 110 VAC to -48 Vdc and provides 12.7 amp-hours of backup, which guarantees 8 hours of continuous service in the event of a power failure. ADC does offer the Lorain/Reliance Comm/Tec battery backup and rectifier system separately as FLC-AC/BB2. If the application uses a four position wall mount chassis and a -48 Vdc power supply is locally available, ADC supplies FWM-xxX04A,* a four position chassis without a separate power source. 2 Position Chassis ADC originally designed FRM-FAW02x,** a two position horizontal rack mount chassis, for DLC applications where a -48 Vdc power supply is typically available. For two position applications requiring an AC/DC converter, ADC recommends FLC-HDW009, a 3 amp, wall-mountable AC/DC power supply. FLC-HDW010 is used to install this power supply in either a 19" or 23" rack. (See ADCP-61-162 for additional technical specifications.) Fiber Loop Converter (FLC) Powering Overview *When ordering, " x " is replaced with ww for wire-wrap IN/OUT connections or RJ for RJ48 jack modular IN/ OUT connections. **When ordering, " x " is replaced by B for a QFLC 23" chassis, C for a DS3 FLC 23" chassis or D for a QFLC 19" chassis. ADC does not offer a 19" DS3 FLC chassis. 3 Application Note 1212Fiber Loop Converter (FLC) Powering Table 2 summarizes the suggested powering methods for the different chassis. Description Empty eight position chassis Empty eight position chassis Rectifier cabinet 2 amp AC/DC rectifer module Empty four position chassis Four position chassis with dual/redundant AC/DC converters Four position chassis with Lorain/Reliance Comm/Tec rectifier and battery backup Empty two position horizontal chassis Empty two position horizontal chassis Pylon 3 amp AC/DC converter Chassis Eight Position Four Position Two Position Required Catalog Number FRM-xxW08A* FRM-xxW08A* MZ12CAB MZ2A50 FWM-xxX04A** FWM-xxA04A** FWM-xxD04B** FRM-FAW02x*** FRM-FAW02x*** FLC-HDW009*** Application -48 Vdc power locally available AC/DC converter required -48 Vdc power locally available AC/DC converter required AC/DC converter and battery backup required -48 Vdc power locally available AC/DC converter required Table 2: FLC Chassis Suggested Powering Methods *When ordering, "xx" is replaced by FA for a front access chassis or RA for a rear access chassis. ** When ordering, "xx" is replaced with WW for wire-wrap IN/OUT connections or RJ for RJ48 jack modular IN/OUT connections. *** When ordering, "x" is replaced by B for a QFLC 23 inch chassis, C for a DS3 FLC 23 inch chassis, or D for a QFLC 19 inch chassis. ADC does not offer a 19 inch DS3 FLC chassis. Note: ADC recommends fusing all systems at 150% of the maximum current draw. Application Note 1212 2/95 Original © 1994, 1995 ADC Telecommunications, Inc. All Rights Reserved An Equal Opportunity Employer Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters office in Minneapolis. ADC Telecommunications, Inc. 4900 West 78th Street Minneapolis, Minnesota 55435 FAX: (612) 946-3292 For U.S. Sales, Call Toll Free: 1-800-366-3891 ® Telecommunications International Sales Offices: Belgium 32-2-721-5282 • United Kingdom 44-734-441955 • Montreal, Quebec (514) 677-9166 • Vancouver, BC (604) 270-1675 • Toronto, Ont. (905) 629-3104 • Ottawa, Ont. (613) 723-2171 • Singapore 65-225-8228 • Venezuela 58-2-953-1684 • Mexico City, Mexico 525-658-4519 • Sydney, Australia 61-2-975-1499 . the various powering options for the Quad Fiber Loop Converter (QFLC) and DS3 Fiber Loop Converter (DS3 FLC). Housing The ADC Quad Fiber Loop Converter (QFLC). mA 256 mA 250 mA 250 mA Fiber Loop Converter (FLC) Powering 2 Application Note 1212 Powering Options Following are suggested powering methods for the