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 between +8 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.
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 nominal +8 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.
Standard Sequential | |
Turn-On/Off | | CC-WW1 |
(max. # of amplifiers is | Direct Plug-In |
15 per CC-WW1) | Power Supply Unit |
| | +8 (min) to +18VDC |
| +8 to 18VDC | |
| 20 mA | |
LISTED 8B42 | | |
COMMERCIAL | | |
POWER | In | |
AMPLIFIER | |
120V~60 Hz 15A | Out | |
| Com | |
| NEC | |
| CLASS 2 ONLY | |
| +8 to 18VDC | |
| 20 mA | |
LISTED 8B42 | | |
COMMERCIAL | | |
POWER | In | |
AMPLIFIER | |
120V~60 Hz 15A | Out | |
| Com | |
| NEC | |
| CLASS 2 ONLY | |
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.
| | NexSys-Initiated Sequential Turn- |
Manually Initiated (hard-wired) | On/Off using NexSys-compatible |
Sequential Turn-On/Off using | | Power/ Output |
NexSys-compatible | | | Modules |
Power/Output Modules | ® | (unlimited # |
When employing NexSys-compatible | of amplifiers) |
Power/Output modules, use either | | |
NexSys-initiated Sequential Turn- | | |
On/Off OR (three-wire) hard-wired | | |
Sequential Turn-On/Turn-Off; NOT | | |
BOTH! | On Off | | |
| | |
| PC |
Output | |
In | NC-NXS |
|
On | |
Com | |
Off | |
On | |
Com | |
Off | |
Out | |
Output | |
In | NC-NXS |
|
On | |
Com | |
Off | |
On | |
Com | |
Off | |
Out | |
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.
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