Crest Audio NC-SLM - TECHNICAL Technical Data

POWER/OUTPUT MODULE
FOR CKS, CKV & CKX SERIES
POWER PROCESSING AMPLIFIERS
Load Monitoring, Sequential Turn-On/Off, NexSys
NC-SLM
AC Voltage & Current Monitor, Audio Return
Product Information
The NC-SLM Module fits in the Power/Output bay located on the rear
panel of Crest Audio CKS, CKV & CKX Series Power Processing
amplifiers. It features full NexSys circuitry for Load Monitoring, Line-
Level Output Audio Return and AC Voltage and Current. Load
Monitoring is a powerful feature that permits measurement plots to be
made of the load (speaker) impedance across frequency ranges on each
amp channel. These can be stored and compared to plots run at a later
date to detect changes or problems with the load. Activation of the
Audio Monitor function by NexSys software places the output of the
selected channel on the Audio Return connector. A balanced line is run
between amplifiers and back to the control position where audio is mon-
itored.
Features
• NexSys compatible
• Signal chassis ground lift jumper
• Includes NexSys monitoring of load, line-level output audio and AC voltage and current
• Amplifier output terminals on barrier strip with 0.44" (11mm) screw spacing and 0.32" (8mm) lug spacing
• 5mm 6-pin Phoenix connector for sequential turn-on/off (STO) connection
• 5mm 3-pin balanced Phoenix connector for NexSys-initiated line-level output audio return
• With NexSys-initiated STO, user-programmable turn-on and turn-off delay times
N C - S L M
c o n n e c t i o n s
USA-specification amplifier shown
Architects and Engineers Specifications - NC-SLM.
The module shall plug into Crest Audio CKS or CKV Power Processing amplifiers in the
Power/Output bay. The module shall provide NexSys-initiated and hard closure initiated
sequential turn-on/off capability for groups of CKS and/or CKV amplifiers. The module
shall provide turn-on to the host CKS and/or CKV amplifier and a sequential turn-on output
to the next amplifier in the chain. Disconnection of AC power to any number of amplifiers
in the chain shall not affect the turn-on sequence capability of all other amplifiers in the
chain.
• Simple setup, tamper-proof configuration
• Sequential turn-on/off initiated by NexSys or a hard closure
Sequential
Turn-On/Off
connection to
other
amplifiers
CLASS 2
WIRING MAY
Sequential
BE USED
Turn-On
In Output
+
–
–
On
A
Com
LISTED 8B42
+
COMMERCIAL
POWER
Off
AMPLIFIER
120V~60 Hz 15A
On
+
Com
Return
B
Off
–
Signal
Out Ground
Lift
Jumper
Model
NC-SLM
Audio Return
®
Due to potential level differences and the effect of the driver's frequency
band and tone, only one channel in a system can be placed on the Audio
Return bus at any time.
NC-SLM also provides for NexSys initiation or hard closure activation
of Sequential Turn-On/Off (STO). Being self-powered prior to the
amplifier power-on, the NC-SLM does not require an external DC sup-
ply to activate Sequential Turn-On/Off. The front panel power activation
switch must be in the "Remote" position for the NC-SLM to initiate or
be part of a Turn-On/Off sequence. NC-SLM requires both an NC-IPN
(or any other programmable Input Processor NC Module), and an NC-
NXS Module for operation.
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Model Output Power Model
Name @70.7V Name
CKS 100
CKV 100 50W
CKS 200
CKV 200 100W
CKS 400
CKV 400 200W
CKS 800
CKV 800 400W
CKS 800-2
CKV 1600 800W
CKS 1200-2
CKV 2400 1200W
CKS 1600-2
Audio
Out
Network
Data
+ – + –
NexSys Bus
The module shall contain the power supplies required for powering the NC-NXS NexSys
Network module (if fitted). The module shall include the hardware required for NexSys
Load Monitoring and AC voltage and current monitoring. A 5mm 6-pin Phoenix connector
shall be provided to receive and pass on the turn-on/turn-off initiation signal. A closure
across two of the Phoenix connector terminals on the first amplifier in the chain shall initiate
the turn-on/turn-off sequence. The module shall provide outputs for both amplifier channels
on barrier strip connectors and a signal ground lift jumper. The module shall be designated
the Crest Audio model NC-SLM.
Power
Processing
Modules
power supply,
Output Power
@8 /Ch.
N-Coder
50W Data
100W Port
200W
400W
400W
600W
800W
Address Model
NC-NXS
8 8
Hi Lo
Input A Input B
+ – + –