2 Channel RS232 Relay Control

2-Channel RS-232 Relay Controllers

Setup for the R25RS RS232 relay shown above with onboard Serial and power connections. Simply connect the Power and Serial Cable and start sending commands. Quick Connect terminal block makes if easy to connect electronics.

Dual RS232 Relay at a Glance

  • 9600 Baud Operation
  • Integrated serial & power connectors on select boards
  • Terminal Blocks for easy electronic connections on select boards
  • Solder on connections on select boards
  • Solid State Relays on select boards
  • E3C Compliant
  • Relay Status LEDs
  • Programmable E3C Device Number
  • High-Quality Sealed Relays

Desktop Control

N-Button Lite
Control Relays without any programming!
N-Button Lite creates up to 8 desktop widgets to turn relays on/off or read A/D inputs directly without any programming.
Stock#: N-Button Lite $49.00
 

Debug and Test Tool

Comm Operator
Purchase Comm Operator
Comm Operator is a powerful communication tool for serial port, TCP/IP and UDP. It can debug and test RS232 related devices.
Stock#: Comm Operator $59.00
 

Hi Res Timer Software

Quick Timer R2X
Quick Timer R2X is high resolution programmable timer software
Quick Timer R2X is high resolution programmable timer software to control 2 channel of relay boards. For science project, laboratory experimenter, home automation, etc.
Stock#: Quick Timer R2X $56.00
 

Timer Software

Relay Timer R2X
Relay Timer R2X Programmable Timer
Relay Timer R2X is programmable timer software for setting timing features of the relay. It works with 2-channel relay controller boards.
Stock#: Relay Timer R2X $56.00
 

Questions?

AccessNCD

At AccessNCD we give you access to NCD technicians, developers and other customers! Our highly trained technicians and developers responding are the same ones designing and using these boards. If you are working on a sensitive project your questions can be posted privately without being posted to the public forum. Visit Today!

Dual RS232 Relay for Any Application

Choose a board Configuration That Fits Your Needs
Control One or Both Relays with Two-Way Communication
Highly Reliable Relay Board For Demanding Applications

Large Selection

We offer a large selection of 4 Channel RS232 Relays for applications ranging from low power signal switching to high voltage, high current applications.  If your looking for a four channel relay controller we have a configuration to fit every need.  4 Channel Relay Controllers are ideal for computer control applications where small size and high functionality are required.  The R410 controller continues to be one of our most popular controllers year after year.  The ADR510ProXR controller is a full ProXR controller that features the ProXR command set, Analog to Digital Conversion and is expandable to 256 relays!  Solid State and DPDT configurations can now be found in a 4 channel relay controller as well.

RS232 Switching with a Serial Port

RS232 Relay or Serial Relay Controllers allow computer controlled switching using the Serial port of your computer.  Select NCD Serial Relay Drivers support 8-Channels of 8-Bit / 10-Bit Analog to Digital Conversion (A/D), and include an XR Relay Expansion Port for adding additional relays to the RS232 Relay Controller Board.

Supports any COM Port

An RS232 Relay supports any available COM port at any standard baud rate, allowing easy integration into any program that support serial communications. The RS232 Relay is ideally suited for applications that require data collection and control from a single device. Built-in temperature sensor allows temperature monitoring, analog to digital conversion, and relay control from a single device. RS-232 Interface Supports baud rates up to 115.2K Baud.

Easy Connection with the Quick Start Kit

For 2 Channel Controllers that do not have than integrated serial connection and power connector look for the Quick Start Kit at checkout. The Quick Start Kit will provide easy connection to a serial cable and ships with a power supply and RS232 cable. Connect these RS232 boards to the USB port of your computer using a USB to Serial adapter. The USB to Serial Adapter is to be used with the Quick Start Kit and is available at checkout.

NCD Component Library

Fully functioning programs for the Pro Series Controllers are included with the NCD Component Library. With the NCD Component Library we've "started" the programming for you. We say started because these are fully functioning samples but we've also included the source code so you can customize them to your exact needs.  The NCD Component Library is a plug-in for the Visual Studio 2005/2008 that greatly simplifies the communications to the NCD product line.  The samples can be run in Visual Studio and fully customizable to your needs.  Four different Pro Series samples are available including Relay Control, Read Status and Timing Features , to view screen shots of each sample visit our NCD Component Library Page.  Start by downloading the FREE NCD Component Library and you will be communicating with any NCD device faster that ever! 


R8XSample1.exe 8 Relay Control Sample 1
The above sample demonstrates control and status read of up to 8 Relays. Compatible with all Pro (NOT ProXR) Series Relay Controllers, Including 4 and 8-Channel SPDT and DPDT Versions.
The above screen shot shows one of the four available fully functioning Pro Series samples that are available with the NCD Component Library.  View all the examples on our NCD Component Library Page.

Desktop Relay Control

N-Button creates widgets or buttons to control up to eight relays without any programming.  A new button will be created and placed on the desktop of your computer for each relay that you want to control. N-Button Lite supports Serial Port/ USB and Network connection between PC and relay board.  N-Button Manager makes it easy to add any type of button to the desktop and change the properties.

Relay Button widgets turn relays on/off directly. It has never been so easy to control relays before.
 
Relay Status widgets show status of the relay automatically right on the desktop!

N-Button Lite is available as a free download. Look for the Desktop Control section to the right to download.

N-Button Lite version supports up to 8 widgets. If you want to add more than 8 widgets, you need upgrade to the standard version.

 

This video is a basic introduction to the world of Computer Controlled Switching and Relays in general.
Also read our "Introduction to Computer Control" Article.

 

Watch to find out the advantages of wired communications and the differences between wired communications.
Also read our Articles on Communication Protocols.

 

This video will show you what Induction is and how to use Capacitors to Suppress it.
Also read our Article on Induction Suppression.

 

Learn about the mechanics, applications, and tricks to Analog to Digital Conversion.
Also read our Article on Analog to Digital Conversion.

 

This movie will show you how to find the Com Port assigned to your Relay Controller.
The first half of the video will show you how to do so in Windows Vista and the second half is using Windows XP.

 

This movie will explain the different expansion options that can be used with our controllers.

2-Channel RS-232 Relay Controllers

Displaying 1 - 36 of 36 Products in this Category.
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ADR220PROXR
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$154.00/ea
ADR230PROXR
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR Series
  • 8 A/D Inputs
  • XR Expansion Port
  • Learn More
$164.00/ea
KLRR210_ZRS
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Key-Fob Series
  • Learn More
$176.00/ea
KLRR220_ZRS
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Key-Fob Series
  • Learn More
$186.00/ea
KLRR230_ZRS
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Key-Fob Series
  • Learn More
$196.00/ea
KLRR25_ZRS
  • 2 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Key-Fob Series
  • Learn More
$166.00/ea
LRR210_ZRS
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Reactor Series
  • Learn More
$138.00/ea
LRR220_ZRS
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Reactor Series
  • Learn More
$148.00/ea
LRR230_ZRS
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Reactor Series
  • Learn More
$158.00/ea
LRR25_ZRS
  • 2 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Reactor Series
  • Learn More
$128.00/ea
LRSSR2x_ZRS
  • 2 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • Reactor Series
  • Learn More
$128.00/ea
LRSSR2x_ZRS_MIX
  • 2 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • Reactor Series
  • Learn More
$128.00/ea
R210
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$69.00/ea
R210PL_ZRS
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR-Lite Series
  • Learn More
$113.00/ea
R210RS
  • 2 Relays
  • 10 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$79.00/ea
R21DPDT
  • 2 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$59.00/ea
R21DPDTCN
  • 2 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$69.00/ea
R21DPDTCNRS
  • 2 Relays
  • 1 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$79.00/ea
R220
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$79.00/ea
R220HP
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$24.00/ea
R220HPRS
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$34.00/ea
R220PL_ZRS
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR-Lite Series
  • Learn More
$123.00/ea
R220RS
  • 2 Relays
  • 20 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$89.00/ea
R230
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$89.00/ea
R230PL_ZRS
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR-Lite Series
  • Learn More
$133.00/ea
R230RS
  • 2 Relays
  • 30 Amp SPST
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$99.00/ea
R23DPDT
  • 2 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$64.00/ea
R23DPDTCN
  • 2 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$74.00/ea
R23DPDTCNRS
  • 2 Relays
  • 3 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$84.00/ea
R25
  • 2 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • Economy Series
  • Learn More
$59.00/ea
R25DPDTCN
  • 2 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$79.00/ea
R25DPDTCNRS
  • 2 Relays
  • 5 Amp DPDT
  • Serial Communication
  • Ideal Use: Signal Switching
  • Economy Series
  • Learn More
$89.00/ea
R25PL_ZRS
  • 2 Relays
  • 5 Amp SPDT
  • Serial Communication
  • Ideal Use: Power Switching
  • ProXR-Lite Series
  • Learn More
$103.00/ea
R25RS
RS-232 2-Channel 5-Amp SPDT Relay Controller with RS-232 Interface

Learn More

$69.00/ea
SSR2x
  • 2 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • Economy Series
  • Learn More
$59.00/ea
SSR2xRS
  • 2 Relays
  • Optional Amp Solid-State
  • Serial Communication
  • Ideal Use: SS Switching
  • Economy Series
  • Learn More
$69.00/ea
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