User manual PROEL PLFON250

[. . . ] - Care should be taken so that objects do not fall onto and liquids are not spilled inside the product. Connect the apparatus to a power supply only with the power cord included: - Make sure that the power supply has a ground connection in working order. - The power supply cord should be unplugged from the outlet when left unused for a long period of time. [. . . ] In case of fault or maintenance this product should be serviced only by qualified service personnel when: - There is a flaw either in the connections or in the connecting cables. Maintenance should be carried out by an authorized Proel technician or service center. DESCRIPTION The PLFON250 has been designed for industrial use (factories, offices, public buildings) and for any PA application. It features one line input, one line output (pre and post-master fader), allowing input and connection with other systems. The amplifier supplies a 240W power on the constant voltage output (100V) or, alternatively, on the low impedance output (8) and it features thermal protection. The PLFON250 can be fed both by line power supply and 24VDC batteries. It can also be mounted on a 19" rack using the special brackets supplied with the unit. If using a power supply socket without earth contact, it is necessary to connect amplifier to ground by means of the fastening clamp. 9 24VDC POWER SUPPLY Amplifier can be powered by a 24VDC battery through + and ­ contacts. When a battery is being used, the amplifier's output power reduces in relation to battery state. The ON/OFF switch does not control the amplifier's startup when it is being powered by a battery. It is recommended to use a battery with a current value able to grant amplifier operation for the time required (e. 10 TERMINAL BOARD OUTPUTS It is possible to connect passive loudspeakers for a total impedance of 8 by connecting the "-" loudspeaker terminal to amplifier "COM" terminal and "+" loudspeaker terminal to "8" amplifier terminal; or it is possible to connect constant voltage (100V) line transformer loudspeakers connecting "-" loudspeaker terminal with amplifier "COM" terminal and "+" loudspeaker terminal with amplifier "100V" terminal. Total connected loudspeaker power must remain within the amplifier's maximum output power. [. . . ] 10 TERMINAL BOARD OUTPUTS It is possible to connect passive loudspeakers for a total impedance of 8 by connecting the "-" loudspeaker terminal to amplifier "COM" terminal and "+" loudspeaker terminal to "8" amplifier terminal; or it is possible to connect constant voltage (100V) line transformer loudspeakers connecting "-" loudspeaker terminal with amplifier "COM" terminal and "+" loudspeaker terminal with amplifier "100V" terminal. Total connected loudspeaker power must remain within the amplifier's maximum output power. It is not recommended to connect low impedance loudspeakers and constant voltage line transformer loudspeakers at the same time. [. . . ]