TAILIEUCHUNG - Fiber Loop Converter (FLC) Powering

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. | Application Note 1212 X Fiber Loop Converter FLC Powering Telecommunications Overview 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. Table 1 FLC Module Current Specifications Module Application Typical Current per Module Maximum Current per Module QFLC Online no simplex current provided 250 mA 336 mA Standby no simplex current provided 170 mA 256 mA Online simplex current provided 490 mA 600 mA Standby simplex current provided 170 mA 256 mA DS3 FLC Online 200 mA 250 mA Standby 200 mA 250 mA 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. 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

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