Crest Audio CKS, Owner'S Manual

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Page 10 Crest Audio CK Power Processing Amplifiers
Service Information. For service, contact your nearest Crest Audio Service Center, Distributor, Dealer, or any of the worldwide Crest Audio
offices, or contact Crest Audio Inc. Customer Service directly at: T
E L
. 201.909.8700 (USA) Fax. 201.909.8744 (USA).
For technical inquiries only, the Crest Audio Technical Services Dept. can be faxed at 201.587.0550 (USA).
Crest Audio may also
be contacted on the World Wide Web at: http://www.crestaudio.com.
Standard Sequential Turn-On/Turn-Off Wiring.
For CK Power Processing amplifier systems configured
for basic non-NexSys applications, (CC-IPB with CC-
STL) an external Direct Plug-In Power Supply Unit is
needed to provide a n8 to +18 Volts to each
STL module. Use only a two-wire power supply! This
power supply (part number CC-WW1) may be ordered
from Crest Audio . (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 Power Processing amplifier are bussed together in
parallel and connected to the DC supply. The “Out” ter-
minal of each CK amplifier is connected to the “In” ter-
minal 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 initi-
ate the power turn-on sequence and keep the amplifiers
in the chain powered on.
Output
Com
On
Off
Com
On
Off
In
Out
Output
Com
On
Off
Com
On
Off
In
Out
PC
®
NC-NXS
NC-NXS
Off
On
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)
Manually Initiated (hard-wired)
Sequential Turn-On/Off using
NexSys-compatible
Power/Output Modules
When employing NexSys-compatible
Power/Output modules, use either
NexSys-initiated Sequential Turn-
On/Off OR (three-wire) hard-wired
Sequential Turn-On/Turn-Off; NOT
BOTH!
NexSys-Initiated Sequential Turn-
On/Off using NexSys-compatible
Power/ Output
Modules
(unlimited #
of amplifiers)
Manual or NexSys-Compatible Sequential Turn-On/Turn-Off Wiring.
CK Power Processing amplifiers fitted with a NexSys-compatible NC
Power/Output Module (NC-STI, NC-SAC, NC-SLM) may be powered up via
NexSys OR with a manual switch closure. If NexSys is employed, the STO delay
time is also software-controllable. Note: when using NexSys control, hard-wiring
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, regard-
less of which source (hardware switch or NexSys STO command) has initiated
the command.
The modules (and the non-NexSys compatible CC-SIO) feature a 6-pin connector
providing a 3-wire input from switch closures (or from a CK Power Processing
amplifier) and an opto-isolated 3-wire output to another CK Power Processing
amplifier. The 3-wire signals are: ON, OFF, and COM. To initiate either the ON
or OFF function manually, simply provide a closure from the proper signal line to
COM; after a time delay of approximately 200ms, the closure is echoed on the 3
isolated output signal pins to initiate the turn-on function in 'downstream' ampli-
fiers. The on/off closures can be either momentary or constant contact.
Sequential Turn-On/Turn-Off.
CK Power Processing amplifiers come standard with the CC-STL Sequential Turn-On/Turn-Off (STO) Output/Power module installed. If the
amplifier front power switch is set to “remote” and a voltage of b8 to +18 VDC is applied across the “Com” and “+8 to +18V” termi-
nals, a closure between the “In” and “Com” terminals will turn the amplifier on. Additional amplifiers are added to the chain by looping from
the "Out" terminal of one amplifier into the "In" terminal of the next amplifier.
Turn-on delay time between amplifiers fitted with basic modules (i.e., CC-STL) is approximately 100ms, turn-off delay time is 200ms. (When
using NexSys-controlled Power/Output modules, these standard turn-on and turn-off delay times may be modified in the software). The number
of CC-STL modules that an external DC supply will be able to power is dependent on the supply's voltage output and current capability. The
external Direct Plug-In Power Supply Unit (CC-WW1, available from Crest Audio) supplies 9 volts at 300 milliamps and can power 15 CC-
STL modules. If your configuration requires the STO control of more than 15 amplifiers, contact Crest Audio.