Instruction manual

Sequential Turn-On/Off Connections
CK family amplifiers come standard with the CC-STL Sequential Turn-On/Turn-Off (STO)
Output/Power module installed. On this module, a four-pin Sequential Turn-On/Turn-Off (STO)
connector is supplied. A mating connector is shipped with the amplifier. With the amplifier front
power switch set to “remote”, a voltage of between +8 to +18 VDC can be applied across the “Com”
and “+8 to +18V” terminals. When the voltage is on/available, a closure between the “In” and
“Com” terminals will turn the amplifier on. Additional amplifiers are added to the turn-on chain by
looping from the “Out” terminal of one amplifier into the “In” terminal of the next amplifier.
Standard Sequential Turn-On/Turn-Off.
For CK family amplifier systems configured for basic non-NexSys applications, (CC-IPB with CC-
STL) an external power supply is needed to provide a nominal +8 to +18 Volts to each STL mod-
ule. The number of CC-STL modules that an external DC supply will be able to power is dependent
on the power supply’s voltage output and current capability. Crest Audio’s external Direct Plug-In
Power Supply Unit (CC-WW1) supplies 9 volts at 300 milliamps and can power 15 CC-STL mod-
ules. Use only a two-wire power supply! If your configuration requires the STO control of more than
15 amplifiers, contact Crest Audio Customer Service for more information. (Note that module CC-
SDC has an integral STO power supply, and does not require CC-WW1).
The “Com” and “+8 to+18V” terminals on each CK family amplifier are bussed together in parallel
and connected to the DC supply. The “Out” terminal of each CK amplifier is connected to the “In”
terminal of the next CK amplifier
in the turn-on sequence. The first
amplifier in the chain requires an
SPST closure between it’s “In”
terminal and “Com” terminal to
initiate the power turn-on
sequence and keep the amplifiers
in the chain powered on.
Turn-on delay time between
amplifiers fitted with basic mod-
ules (i.e., CC-STL) is approxi-
mately 100ms, turn-off delay time
is 200ms.
Com
Out
In
+8 to 18VDC
20 mA
NEC
CLASS 2 ONLY
Com
Out
In
+8 to 18VDC
20 mA
NEC
CLASS 2 ONLY
LISTED 8B42
COMMERCIAL
POWER
AMPLIFIER
120V~60 Hz 15A
LISTED 8B42
COMMERCIAL
POWER
AMPLIFIER
120V~60 Hz 15A
CC-WW1
Direct Plug-In
Power Supply Unit
+8 (min) to +18VDC (max)
Standard Sequential
Turn-On/Off
(max. # of amplifiers is
15 per CC-WW1)