Power Supply; Chassis Grounding; Pm-712/0 Bus - Internal Configuration - Opvimus PM-712/0 Gebrauchsanweisung

E N G L I S H
PM-712/0

1.4. POWER SUPPLY

Use of a + 24 VDC / 3 A power supply is recommended
for the PM-712/0 (see figure 3, 1 ).
Maximum power consumption is 2.5 A.
The power consumption varies depending on the
model and quantities of each card inserted in the
PM712/0.

1.5. CHASSIS GROUNDING

For all P.A. systems it is very important that there is
only a single connecting point between the signal
Figure 3
ENG
ground and the power grounding contact.
If the P.A. system consists of several pieces of equipment, they will probably be joined via the chassis through a
ground terminal for connection to the power supply or because they are mounted on a rack stand.
If the grounds are also linked via the signal circuits, it is advisable to remove the jumper between the ground and
the chassis (see figure 3, 2 ) in all but one of the units.
1.6. PM-712/0 BUS – INTERNAL CONFIGURATION
The default setup of the PM-712/0 consists of an input card (C-710LE), an output card (C-710LS) and a bus with
12 free card positions.
The cards have cascade priority, so that the card located in the OUT position has the lowest priority ranking,
followed by position 12, position 11, and so on up to position IN, which has the highest priority ranking.
If the priority of more than one input is activated, only the signal from the card in the highest priority position
reaches the channel output.
In order to make the priority system more versatile, the bus has been designed so that it can be divided into
several sections. Thus, each section (consisting of one or more card slots as required) works as an independent
module.
To do this, the four jumpers between one slot and the next one must be cut, making one part of the bus
independent from the adjacent section. Each of the four jumpers cuts a different signal (priority audio, program
audio, priority between cards and priority bus). See figures 4 and 5.
Figure 4
PM-712/0 15