We Accept:

Computer Controlled Relay
Relay Controllers Relay Boards
32 Channel Ethernet Relay Board
Ozarks Audio Visual is pleased to announce that we are now the exclusive dealer for National Control Devices! The largest manufacturer of relay boards in the world!
Quick Links:
USB Relay Wireless Relay Ethernet Relay
RS-232 Relay ZigBee Relay Bluetooth Relay
WiFi Relay    
Phone: 800-960-4287        email: sales@ozarksav.com        Fax: 417-646-5662
USB Relay
USB Relay Board
  • Computer controlled switching using the USB port of your computer
  • Works with any programming language that supports serial communications
  • COM drivers allow you to assign any COM port to this device

Wireless Relay
Wireless Relay Boards

  • 802.11b Wi-Fi Wireless Network Relay Controllers
  • Integrated 8/10-Bit Analog to Digital Conversion
  • 16 or 32 On-Board Relays
  • RoHS Compliant
  • Embedded Web Server and 802.11b WLAN Interface, Antenna and Power Supply

Ethernet Relay
Ethernet Relay Board

  • Control up to 256 Relays over your Local Area Network
  • Now Supporting Ethernet and Wi-Fi 802.11b Communications
  • Mounts as a Virtual COM Port over TCP/IP Network for Easy Programming
  • RoHS Compliant Option
USB Relay Ethernet Relay Ethernet Relay
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RS232 Relay
RS232 Relay Board

  • Our Original RS232 Relay Offers More Features and Expandability than Any Other
  • Offers a 5-Year Warranty and Proven ProXR Command Set
  • Sets the Standard for which all other Computer Controlled Switching Devices should be judged

ZigBee Relay
RS232 Relay Board

  • Transparent Wireless Serial Connection Between your Computer and Our Controller
  • Just plug in a ZigBee Modem into the USB Port of your PC and open the virtual COM Port
  • Talks to this device as though it were directly connected to your PC

Bluetooth Relay
Bluetooth Relay Board

  • Allows wireless switching using any Bluetooth PDA, Laptop, or Computer
  • Mounts as a Bluetooth Serial device
  • Simply Open the new COM port and talk to the device as though it were directly connected to the Serial port
  • Embedded Web Server and 802.11b WLAN Interface, Antenna and Power Supply
  • Very easy to use and Program
RS232 Relay  ZigBee Wireless Relay 
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Analog to Digital Converter
USB A/D Converter

  • Read light levels
  • AD temperature converter
  • Easily activate relays when A/D limits are reached
  • Detect audio levels in a room when connected to a microphone
  • Applications are limitless, and surprisingly easy to integrate

Mirror Modules
Control Relays Without a Computer

  • ZigBee Wireless Now Available
  • Control Remote Wireless Relays from Contact Closure Inputs
  • Controls up to 24 Different Relay Controllers
  • Control up to 256 Relays
  • High-Speed 2-Way Communications

USB Potentiometer
Programmable Potentiometer
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WiFi 802.11b Relay
Can also be controlled using Telnet. I.P. Addresses WiFi Relay
  • Computer Controlled Switching from Anywhere on the Network
  • Easy Software Development
  • Many Communication Protocols for Advanced Users
  • 16 Channel Boards Available
 ProMOTE Software
Control Any NCD Bluetooth Relay With a Cell Phone!
  • Bluetooth Interface allows you to use your cell phone or PDA as a remote control
  • Software also allows wireless communications from your PC
  • Compatible with any NCD Bluetooth Relay Boards

SignalSwitch.com
Control Devices Over the Internet

  • SignalSwitch.com Internet ControlUser-Customized Pages for Controlling Devices from Anywhere in the World
  • Create your OWN Interface to Control NCD Devices with NO PROGRAMMING
  • Turn your browser into a working remote control
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Articles

Learn about different technologies and discover new technologies with our helpful Articles section.

  • Introduction to Computer Control
  • RS-232 Serial Communications
  • USB Communications
  • ZigBee Communications
  • Wi-Fi 802.11b and Ethernet Communications
  • Bluetooth Communications
  • Analog to Digital Conversion
  • Introduction to Mirror Modules

More Information>
NCD Component Library
 Fully Functioning Samples!
    Summary of Component Library
  • Simplifies communications
  • Samples for specific applications
  • Samples for specific relays
  • Source code included so you can customize the sample to fit your needs
  • Ethernet & Network Samples also available - click here
  • All samples are FREE
NCD Component Library

To Learn More and See Sample Screen Shots - Click Here
Over 40 samples included with this download!  Start by downloading the NCD Component Library and you'll be communicating with any device faster that ever!
Very Little or NO Programming Involved!
R410PRO
RS-232 Relay Serial Relay Board with Four 10 Amp Relays RS232 Relay
  • Shelves molded from high-density polyethylene plastic
  • Read Status of All or Individual Relays
  • Two-Way Communication Capabilities
  • Quick Connect Terminal Blocks
  • Quick Start Kit Available
BTADR220ProXR
Bluetooth Relay 2-Channel 20 Amp SPDT + 8-Channel 8/10-Bit A/D 2 Channel Bluetooth Relay
  • Two 20-Amp SPDT Relays
  • Mounts as a Virtual COM Port
  • Wireless Communications with No Special Software
  • 20A and 30A SPDT Available
  • NO DRIVERS REQUIRED!!!

UXPR161DPDTProXR
USB Relay 16-Channel 1 Amp DPDT + UXP Expansion PortUSB Relay

  • USB Interface Mounts as a Virtual COM Port for Easy Programming
  • XR Expansion Port Allows you to Add More Relays to this Device
  • UXP Expansion Port Allows you to Add Expansion Modules
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R325DPDTPROXR
32-Channel RS232 5A DPDT RS-232 Latching Relay Board 32 Channel DPDT Relay

  • Sixteen Background Timers are Ideal for Duration Timing
  • Expandable to control up to 256 Relays using the XR Expansion Port
  • Control One Relay at a Time or All 256 Relays at Once with Manual and Automatic Refreshing Command Set

UXPSR325ProXR
32-Channel USB 5 Amp SPDT + UXP Universal Expansion Port 32 Channel USB Relay

  • USB Interface Mounts as a Virtual COM Port for Easy Programming
  • XR Expansion Port Allows you to Add More Relays to this Device
  • 1, 3 and 5 Amp DPDT Versions Available

NER3210ProXR
32-Channel Ethernet 10-Amp Latching Relay Board + 8-Channel A/D32 Channel Ethernet Relay

  • Ethernet Network Data Collection and Relay with Future Expandability in Mind
  • RealPort Drivers Map Network IP Address to a COM Port
  • Supports Telnet & Data Encryption with Password
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Watchdog Timer
Watchdog Server Reboot
  • Control up to 256 Relays over your Local Area Network
  • Now Supporting Ethernet and Wi-Fi 802.11b Communications
  • Mounts as a Virtual COM Port over TCP/IP Network for Easy Programming
 Quick Start Kit
Look For the Quick Start Kit when Ordering RS232 Boards
  • Kit includes:
     - Power Supply
     - Serial Cable
     - RSIO Serial Interface Board
  • Everything you need to begin using your RS232 relay controller
  • Look for the kit that works with your controller at checkout
 R25
Single Relay 20-Amp SPDT High-Power Relay Board 1 Channel Relay
  • Low-Cost Single Relay Configuration
  • 1 Relay Status LEDs
  • 2-Way Communication Capable
  • Quick Start Kit Available
  • Made in USA
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Why Purchase Relays from Ozarks Audio Visual
Easy Payment Methods
We accept Visa, MasterCard, American Express, Discover through our shopping cart or simply call our office and give us your order over the phone.  We also accept Government Purchase Orders.  If you require a detailed quote before you place your order call us and we will send you a personalized quote with the equipment you request.
Order Status
 When you place your order we'll send you a tracking number when it ships and a paid invoice for your records.  		Fast, Free Shipping
 Our products usually ship within three to five days although most items ship the next business day.  If you need something in a hurry call us and we'll ship to accommodate your schedule.  Relay orders over $100 ship UPS Ground FREE within the continental US!
Keeping You Informed
Check out our Blog to keep you informed of new products, helpful tips and other information to keep you and your equipment running. http://www.ozarksav.blogspot.com/		 Fast, Efficient, Friendly Service
It's not just a catchy phrase with us it's how we do business.  We'll make sure your order ships in a timely manor and send you a tracking number when it does.
We Ship To Canada!
Shipping to Canada?  Not a problem!  Call us at 800-960-4287 and place your order, most orders ship UPS Standard delivery at reasonable rates.
Ozarks Audio Visual 800-960-4287