Crest Audio NC-SAC - TECHNICAL Instruction manual

Features
• NexSys compatible • Includes NexSys monitoring of AC voltage and current
• Amplifier output terminals on barrier strip connectors • Signal chassis ground lift jumper
• 5mm 6-pin Phoenix connector for sequential turn-on/off (STO) connection
• Sequential turn-on/off initiated by hard closure (standard) or NexSys
• With NexSys-initiated STO, user-programmable turn-on and turn-off delay times
NC-SAC Sequential Turn-On/Off, NexSys power supply, AC Voltage & Current Monitor
Product Information
The NC-SAC Module fits in the Power/Output bay located on the rear
panel of Crest Audio CKS, CKV & CKX Series Power Processing
amplifiers. It provides for NexSys®initiation or hard closure activation
of Sequential Turn-On/Off (STO) and includes NexSys AC Voltage and
Current monitoring circuitry. The NC-SAC turn-on and turn-off delay
times are user programmable via NexSys software.
Since the NC-SAC is self-powered prior to the AC mains closure and is
optically isolated from other amplifiers in the turn-on chain, loss of AC
power to any amplifier in the chain will not affect any others during
sequential turn-on. A three-position front panel power switch is fitted to
all CKS, CKV & CKX amplifiers. This must be in the “Remote” posi-
tion for the NC-SAC to initiate an STO sequence.
Architects and Engineers Specifications - NC-SAC.
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 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 ampli-
fiers in the chain. The module shall contain the power supplies required for powering an
NC-NXS module.
The module shall include the hardware required for NexSys AC voltage and current moni-
toring. A 5mm 6-pin Phoenix connector shall be provided to transmit the turn-on initiation
voltage signal. A closure across two of the Phoenix connector terminals 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-SAC.
POWER/OUTPUT MODULE
FOR CKS, CKV & CKX SERIES
POWER PROCESSING AMPLIFIERS
LISTED 8B42
COMMERCIAL
POWER
AMPLIFIER
120V~60 Hz 15A
8
1
9
2
A
3
B
4
C
5
D
6
E
7
F
8
1
9
2
A
3
B
4
C
5
D
6
E
7
F
Model
Name
CKS 100
CKS 200
CKS 400
CKS 800
CKS 800-2
CKS 1200-2
CKS 1600-2
Output Power
@8Ω/Ch.
50W
100W
200W
400W
400W
600W
800W
Mo
d
NC
-
Hi
Data
Lo
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Designed & manufactured in the USA by:
Network
+– +–
Address
Model
Name
. CKV 100
CKV 200
CKV 400
CKV 800
CKV 1600
CKV 2400
Output Power
@70.7V
50W
100W
200W
400W
800W
1200W
Model
NC-SAC
Sequential
Turn-On
Com
On
Off
Com
On
Off
In
Out
Output
A
B
+
+
–
–Signal
Ground
Lift
Jumper
CLASS 2
WIRING MAY
BE USED
+
--
+
--
Sequential Turn-On/Off
connection to other
amplifiers
NexSys Bus
On
Off
Com
On
Off
Com
NC-SAC connections
Power
Processing
Modules
USA-specification amplifier shown

Sequential Turn-On/Off, NexSys power supply, AC Voltage & Current Monitor
SEQUENTIAL
TURN-ON
AC Detect
TO AMPLIFIER
POWER SUPPLY
V line
I line
I/D
ckt
NexSys
Module Bus
ON
COM
OFF
ON
COM
OFF
OUT
IN
NexSys
On/Off
MAINS
Opto
NexSys
Digital Supply
BLOCK DIAGRAM
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: [phone] FAX: [phone]
http://www.crestaudio.com
Printed in USA
NC-SAC Power/Output Module
SPECIFICATIONS
Pass-thru sequence time: 200ms
Connectors: 5mm 6-pin Phoenix connector (STO),
Amplifier output barrier strip*
with 0.44" (11mm) center
and 0.32" (8mm) lug space
Controls: Signal chassis ground lift jumper
*See CKS / CKV power amplifier operator’s manual for power output specifications.
v. 2.1 4/7/97 *A3300029*
Crest Audio reserves the right to make improvements in manufacturing or design which may affect specification. Crest Audio specification literature is available in electronic form to qualified users.
Contact Crest Audio Inc. for more information. NexSys is a registered trademark of Crest Audio Inc. ©1996 Crest Audio Inc.
CONTROL OPTIONS
The following NC-SAC parameters can be
controlled/monitored via hard closure or
NexSys software.
Hard closure:
Sequential Turn On/Off activation
NexSys computer control:
Sequential Turn On/Off initiation & delay
times, monitoring of AC mains voltage, cur-
rent and wattage.