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Rev 04.08.021 - 19 –
Figure 11
12VDC
Supply
amplifiers in the sequence are connected. Connect the negative side of the DC supply to the chassis ground
terminal. If the amplifiers are mounted together in a rack where a common AC Ground connects the chassis
grounds together through common connection via the metal rack rail, no other connections should be required.
(See Figure 10) If this is not the case, simply connect all of the “Chassis Ground” terminals together. (See Figure
11) Place the CV amplifiers’ power switches in the Standby (fully down) position.
To remotely begin the sequencing function, close the circuit, and supply the DC voltage to the “RCV” receive pin
on the first amplifier and the subsequent amplifiers should turn on at 0.5 second intervals. Please note that the
front panel “Power Switch” should be in the “Standby” position on all of the amplifiers in this group. When the DC
voltage is interrupted, the amplifiers will then turn OFF. If there are signal processing and input source devices in
the system, they should be turned ON before the amplifiers are “sequenced” ON, and these same devices should
be powered down after the amplifiers are “sequenced” OFF. This will avoid large transient thumps being passed
to the loudspeakers attached to the system.
When using multiple amplifiers that utilize the
“SEQUENCE” feature of the CV Series amplifiers,
and you would like to power them ON, but remote
operation is not required, you do not need the DC
Voltage to activate the “Sequence” function. Simply
connect the “SND” send terminal of the first
amplifier to the “RCV” receive terminal of the next
amplifier and so on. (See Figure 12) The front
panel Power Switch of the first amplifier will activate
the “SEQUENCE” function when switched to the
ON position. All other front panel “Power Switches”
should be in the “Standby” position for the
“SEQUENCE” function to operate properly. Again,
if the amplifiers are mounted together in a rack
where a common AC Ground connects the chassis
grounds together through common connection via
the metal rack rails, no other connections should be
required.
Ground Test Procedure
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 CV
Series amplifier. If the DC resistance is greater
than 0.2 ohms we recommend that you connect the
chassis ground terminals of the sequence
connector together in a daisy chain as in Figure 12.
Repeat this for each CV Series amplifier in the
rack.
If there is less than a 0.2 ohm resistance from the
rail to the chassis ground of each unit you do not
have to daisy chain the chassis grounds together.
Let the rack rail be your chassis ground path.
Figure 12