Crestron CNCS Operating Manual

Crestron CNCS
AC Current Sensor
Operations Guide

This document was prepared and written by the Technical Documentation department at:

Crestron Electronics, Inc.

15 Volvo Drive

Rockleigh, NJ 07647

1-888-CRESTRON

All brand names, product names and trademarks are the property of their respective owners.

©2007 Crestron Electronics, Inc.

Crestron CNCS AC Current Sensor

Contents

AC Current Sensor: CNCS 1

Introduction ...............................................................................................................................1

Features and Functions................................................................................................ 1

Specifications ..............................................................................................................2

Physical Description.................................................................................................... 2

Industry Compliance ...................................................................................................7

Setup .......................................................................................................................................... 8

Operation ...................................................................................................................................9

POT Adjustments ........................................................................................................9

Threshold Adjustments................................................................................................ 9

CNCS Implementation .............................................................................................. 11

Contact Information and Updates............................................................................................ 12

Further Inquiries........................................................................................................12

Future Updates ..........................................................................................................12

Return and Warranty Policies.................................................................................................. 13

Merchandise Returns / Repair Service ......................................................................13

CRESTRON Limited Warranty.................................................................................13

Operations Guide – DOC. 8079D Contents • i

Crestron CNCS AC Current Sensor

AC Current Sensor: CNCS

Introduction

Features and Functions

• Measures average current of each half cycle of an AC load, up

The CNCS provides power sensing of any single AC powered device or
AC load up to 5 Amps. A current sensor is typically used with any
television, AV receiver, etc. to provide confirmation of the device's
power on/off state. This is often necessary to enable reliable power
control for IR controlled devices that do not include discrete power
commands in their IR control protocol.

The CNCS provides true power status feedback to the control system via
a pair of low-voltage contact closures, which may be connected directly
to Versiports or other digital input ports on any Crestron control system,
room box, expansion module, etc. Although the CNCS is not a Cresnet
device, it does require power (24 and G) from the Cresnet bus.

to a maximum of 5 Amps

• Full load and partial load threshold adjustability by means of a
15-turn precision potentiometer (POT)

• Mutually exclusive full load and partial load relay closures

®

Operations Guide – DOC. 8079D AC Current Sensor: CNCS • 1

AC Current Sensor Crestron CNCS

Specifications

Specifications for the CNCS are listed in the following table.

CNCS Specifications

SPECIFICATION DETAILS

Power Requirements
Cresnet Power Usage 3 Watts

(0.125 Amp @ 24 Volts DC)

Enclosure Steel, black matte powder coat

finish, freestanding

(adhesive feet included)
Dimensions
Height
Width
Depth
Weight 1.8 lb (0.8kg)

1.94 in (4.92 cm)

4.49 in (11.39 cm)

4.33 in (10.99 cm)

Physical Description

This section provides information on the connections, controls and
indicators available on your CNCS.

2 • AC Current Sensor: CNCS Operations Guide – DOC. 8079D