Bose 2150 Руководство монтажника - Страница 16
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4.0 Operation
8. AC power sequence connector (cont.)
When mounting the amplifiers in a common rack, you should verify if the amplifiers' chassis
are sharing a common ground via the rack rails. To do this use a DMM (Digital Multi-Meter)
to measure the DC resistance between the rack rail and the chassis ground of each unit. Set
the DMM to measure DC resistance. Connect one probe to the rack rail and the other to the
chassis ground terminal on the SEQUENCE terminal of the Bose
2150. If the DC resis-
®
tance is greater than 0.2 ohms we recommend that you connect the chassis ground termi-
nals of the sequence connector together in a daisy chain as in Figure 8. Repeat this for
each Bose 2150 in the rack.
You do not have to daisy chain the chassis grounds together if there is less than a 0.2 ohm
resistance from the rail to the chassis ground of each unit. Let the rack rail be your chassis
ground path.
Using other amplifiers in the power sequence:
The Bose Models 1600 VI and 1800 VI can be used together with the Bose Model 2150 in a
sequenced configuration.
However, as the sequence terminal on the Bose
Model 1600 VI and 1800 VI has no chassis
®
ground connector, whenever this manual references the chassis ground connector, you
should replace it with some reliable ground connection point on the amplifier chassis, such
as a screw that is used in fastening the chassis parts together. A good example would be
the screws that retain the Bose input modules to the amplifier chassis. All other connec-
tions would be exactly as described in this discussion of sequencing hook-up procedures.
Note: For operation details regarding the Bose Model 1600 VI and the 1800 VI, please
consult the respective user guides provided with those amplifiers.
16
November 19, 2001
AM259107_00_V.pdf