Multiple Cabinet Connections; Qmb-5000 Motherboards #1, #2, And #3; When Connecting Extra Qmb-5000B Motherboards #4 And Up - Mircom QX-5000 Series Installation And Operation Manual

Multiple Cabinet Connections

Multiple Cabinet Connections
When multiple audio cabinets are used in one installation, each has its own QPS-5000 Power Supply, QMB-5000B
Motherboard, QBC-5000B Battery Charger, and batteries. Only the first audio cabinet requires a QIF-5000B
Interface Module. A total of three audio cabinets may be used by simply interconnecting with Mircom MD-525
Extension Cables from the QMB-5000B "Out" Connector, to the "In" Connector on the next QMB-5000B.
QMB-5000B Motherboards #1, #2, and #3
Multiple QBB-5001 Audio Cabinets may be interconnected up to a total maximum of eight. The first QBB-5001
Audio Cabinet contains a QMB-5000B Motherboard #1 which contains the only QIF-5000B required when
interconnecting multiple QBB-5001 Audio Cabinets. The next two QBB-5001 Audio Cabinets contain QMB-5000B
Motherboards #2 and #3 which are connected with the regular ribbon cable MD-525. The MD-525 cable is
connected to the output connector on motherboard #1 to the input connector on motherboard #2.
Another MD-525 cable is connected from the output connector on motherboard #2 to the input connector on
motherboard #3 (see Figures 6 and 7 for details).

When Connecting Extra QMB-5000B Motherboards #4 and up:

The first MD-525 ribbon cable is connected between Motherboards #3 and #4, and the rest of the other MD-525
cables between subsequent motherboards. The first MD-525 ribbon cable is connected from the Output connector
on Motherboard #3 to the Input connector on Motherboard #4. The next MD-525 ribbon cable is connected from the
Output connector on Motherboard #4 to the Input connector on Motherboard #5, and so on.
From the TS1 terminal block of Motherboard #4, one 18 awg wire is connected to the J3 connector on the QIF-
5000B of Motherboard #1. The sequence and order of connecting to the J3 connector has to be Pin#5 for
Motherboard #4, Pin#4 for Motherboard #5, Pin#3 for Motherboard #6, Pin#2 for Motherboard #7, and Pin#1 for
Motherboard #8. The 8 pin standard molex connector is used to minimize the possibility of connection errors. The
molex connector will allow an easy installation by simply aligning the connector with the top of the QIF-5000B slot
connector on the motherboard. Please note that a misalignment of the molex connector should not cause any
damage, as voltages on top of QIF-5000B connector are low and the driver on the QIF-5000B is well protected.
However, a bad connection may be difficult to troubleshoot.
Note: Jumpers JW1 are removed from all Motherboards #4 to 8.
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