Paso PMD Series Instruction Manual

Contents

Paso PMD Series Instruction Manual Manual pdf 12 page image

12PMD125-V, PMD250-V, PMD500-VFig. 3.2.1AFig. 3.2.2Fig. 3.3.1Fig. 3.4.1 Fig. 3.4.23.2 Rack mountingTo install the PMD amplifiers in a 19” rack cabinet, it is necessary to use the supporting modules-cage provided for this purpose. Each modules-cage can contain up to four amplifiers. Make sure you follow the instructions given below carefully to install the modules-cages inside the rackcabinets properly:3. INSTALLATION AND CONNECTION3.1 General criteriaIn order to allow the equipment to work correctly, it is advisable to comply with a number of general criteria when making the connections:- Avoid positioning cables or microphones on the cabinet of the equipment.- Avoid laying the signal lines parallel to the power-supply lines. Keep a minimum distance of 30/40 cm.- Position the input and output lines at a distance from one another.- In order to avoid acoustic feedback (the Larsen effect), position the microphones out of the angle of coverage of the loudspeakers.- the supporting modules-cage for the amplifiers (see figure 3.2.1) must always be mounted on the supporting brackets provided for this purpose(detail [A]) included in the supply.- a ventilation panel occupying at least one rack unit must always be mounted between one modules-cage and the next, or between a modules-cage and any other equipment mounted in the same rack. If only one modules-cage is installed in the rack, the upper ventilation panel maybe omitted.To mount an amplifier in the modules-cage it is necessary to secure the amplifier to the modules-cage following the mounting instructions attachedto the latter. To fix the rear side, use the screw(s) (detail [A]) as illustrated in Figure 3.2.2.3.3 Signal and serial communication connectionsTo RJ45 sockets (13) are available on the rear panel. Their connectionsare in parallel with one another to enable audio connections at line leveland for serial communications.AUDIO inputs 1 and 2 are electronically balanced.1: AUDIO 1+2: AUDIO 1-3: GND4: AUDIO 2+5: AUDIO 2-6: AUDIO SWITCH7: RS485+ Serial communication8: RS485- Serial communication3.4 Power outputsA terminal strip (10) is available for connection to the loudspeaker lines – see Fig. 3.4.1.The terminal strip (11), on the other hand, is for use for connecting a stand-by amplifier, if required (Fig. 3.4.2).