Crest audio NC-SLM DATASHEET

Power Processing

POWER/OUTPUT MODULE

Modules

FOR CKS, CKV & CKX SERIES

POWER PROCESSING AMPLIFIERS

Load Monitoring, Sequential Turn-On/Off, NexSys®power supply,

NC-SLM

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, LineLevel 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 monitored.

Features

• NexSys compatible • Simple setup, tamper-proof configuration

• Signal chassis ground lift jumper • Sequential turn-on/off initiated by NexSys or a hard closure

• 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

AC Voltage & Current Monitor, 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 supply 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 NCNXS Module for operation.

NC-SLM connections

Sequential

Turn-On/Off

connection to

other

amplifiers

Off

LISTED 8B42

COMMERCIAL

POWER

AMPLIFIER

120V~60 Hz 15A

Com

Sequential

Turn-On

On Com Off On Com Off

Out

Model NC-SLM

Off

CLASS 2

WIRING MAY

BE USED

Output

–

Signal Ground Lift Jumper

–

Audio Return

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.

Audio Return

Designed & manufactured in the USA by:

Model Name

CKV 100 CKV 200 CKV 400 CKV 800

CKV 1600

Out

CKV 2400

Network

+–

Output Power

@70.7V

50W 100W 200W 400W 800W

1200W

+–

Crest Audio Inc. 100 Eisenhower Dr. Paramus, New Jersey 07652 USA

Model Name

CKS 100 CKS 200 CKS 400 CKS 800

CKS 800-2 CKS 1200-2 CKS 1600-2

Data

Output Power

@8Ω/Ch.

50W 100W 200W 400W 400W 600W 800W

Address

N-Coder Data Port

Model NC-NXS

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.

Input A

Input B

–

NC-SLM Power/Output Module

Load Monitoring, Sequential Turn-On/Off, NexSys power supply, AC Voltage & Current Monitor, Audio Return

BLOCK DIAGRAMS

CH A OUT

CH B OUT

AUDIO RETURN OUT

Load Monitor ckt

AUDIO RETURN

OSC

V load I load

CH SEL/GAIN

FROM POWER AMP A

NexSys Module

FROM POWER AMP B

Audio Return Enable OSC Out To

Amp Input

NexSys Module Bus

CONTROL OPTIONS

The following NC-SLM 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, load monitor, monitoring of audio return, AC mains voltage, current and wattage.

SPECIFICATIONS

MAINS

TO AMPLIFIER POWER SUPPLY

Pass-thru sequence time: 200ms Connectors: 5mm 6-pin

AC Detect

V line

I line

Phoenix connector

5mm 3-pin Phoenix audio return

connector (600Ω source impedance;

ON COM OFF

Opto

OUT

SEQUENTIAL TURN-ON

NexSys On/Off

NexSys Digital Supply

I/D ckt

NexSys Module Bus

40dB of attenuation driven into 600Ω,

referenced from speaker terminals)

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.

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.

(STO)

v. 2.1 4/7/97

*A3300032*

100 Eisenhower Dr., Paramus NJ 07652 USA

Crest Audio Inc.

TEL: 201.909.8700 FAX: 201.909.8744

http://www.crestaudio.com

Printed in USA