Owner`s manual

CC
™
owner’s manual
Amplifier Operation
Sequential Turn-On/Turn-Off (STO)
Ci Power Processing amplifiers come standard with Sequential Turn-On/Turn-Off
(STO) circuitry. If the amplifier front power switch is set to “remote,” a single SPDT
toggle switch or two SPST momentary switches can be used to turn the amplifier
on and off. Using the same switch(es), additional amplifiers can be turned on/off
sequentially by daisy chaining the STO “Out” terminals of one amplifier to the STO
“In” terminals of a subsequent amplifier. The standard turn-on delay time between
amplifiers is approximately 100ms; turn-off delay time is 200ms. When using NexSys
control with an amplifier equipped with an NxEthernet8 or NxCobraNet8 module,
these standard turn-on and turn-off delay times may be modified in the control
software.
Note: when using NexSys control, hardwiring for manual switch closure
between amplifiers should be used cautiously. If the switch closure
output is wired up, it WILL cause the next amp to switch, regardless
of which source (hardware switch or NexSys STO command) has
initiated the command.
Standard Sequential Turn-On/Turn-Off Wiring
For non-NexSys remote turn-on, a single SPDT toggle switch or two SPST
momentary switches can be used. In either case, the switch(es) are wired to the
“STO In” connector on the amplifier’s rear panel and the amplifier’s front panel
power switch must be set to “Remote.” With an SPDT toggle, the center tap of
the switch must be wired to the “Com” pin on the connector, one of the end taps
must be wired to the “On” pin, and the other end tap must be wired to the “Off ”
pin. When the switch shorts the “On” and “Com” pins, the amplifier will turn-on.
Likewise, throwing the switch and shorting the “Off” and “Com” pins turns the Ci
off. See the diagram below:
(Diagram of remote turn-on wiring scheme with SPST toggle)
With two SPST momentary switches, one switch must be wired across the “On”
and “Com” pins, and the other switch must be wired across “Off” and “Com” pins.
When the first switch is depressed, it shorts the “On” and “Com” pins, turning
the amplifier on. Depressing the other switch will short the “Off ” and “Com” pins,
turning the Ci off. See the diagram below:
(Diagram of remote turn-on wiring scheme with two SPST momentary switches)
Any number of Ci amplifiers can be daisy-chained together for sequential turn-on.
Wiring two amplifiers for STO is as simple as connecting the “On,” “Com” and “Off ”
pins of the “STO Out” connector on the first amplifier to the corresponding pins
on the “STO In” connector on the second amplifier. Repeating this wiring scheme
with subsequent amplifiers allows entire systems of Ci’s to be wired for STO. See
the diagram below:
(Diagram of STO wiring scheme)