RS232 DPDT Relay Control with Terminal Block Connections
RS232 Controller - 4-Channel 5-Amp DPDT
Pro Series with Screw Terminal Connections
Product Code: R45DPDTCN
Setup for the R45DPDTCN RS232 relay shown above using the optional QS12 Quick Start Kit. Simply Connect the Serial Interface to your Relay Controller, connect the Power and Serial Cable and start sending commands.
CN Series Relay at a Glance
- DPDT Relay Configuration
- 9600 Baud Operation
- Relay Status LEDs
- Convenient Terminal Blocks for easy electronic connections
- E3C Compliant
- Programmable E3C Device Number
- High-Quality Sealed Relays
- TTL RS-232 Inputs
- Overkill Transistor Drivers
- +12 Volt Operation, 2-Wire RS-232
- No-Click Power-up
- See Manual for Outline Dimensions
Video Resources
(Select a thumbnail to view the video)Introduction to Relay Control

Learn how computer controlled relays communicate and control
Intro to Wired Communications

Learn the basics of wired communications and find the right wired controller for your application
Induction Suppression

Learn about Induction Suppression and how to counter it using Capacitors
How to Find the Com Port

Learn how to find the Com Port that your Device is using
Resources:
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R45DPDT
RS232 Controller - 4-Channel 5-Amp DPDT Pro Series with Solder On Connections |
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Stock#: R45DPDT | $126.00 |
Desktop Control
N-Button Lite
Desktop Control & Monitoring
N-Button creates up to 8 desktop widgets to control relays without any programming. Order Today with This Board for Only $29 |
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Stock#: N-Button Lite | $45 |
800-960-4287
417-646-5662
Relay Control with Terminal Block Connections
Convenient Terminal Blocks for easy electronic connections
Quick Start Kit Available for Easy RS232 Connection
Highly Reliable Relay Board For Demanding Applications
RS-232 Serial Relay Controller
This relay controller was developed for users with low-current, low-signal switching applications such as telecommunications, networking, video, line-level audio, and much more.
This relay is equipped with terminal blocks for convenient connection of electronic devices.
This device uses DPDT relays. A single DPDT relay is made up of 2 SPDT switches. So each relay acts as two switches that are activated at the same time. This allows two independent signals to be switched at one time. In effect, there are two independent switches on a single DPDT relay. For an overview on all the types of relays offered on this site visit our Introduction to Computer Control Page.
Features include no-click startup, LED status lights, and E3C compliance. Relays can be controlled at 9600 baud and the board is compatible with ANY computer or microcontroller capable of delivering RS-232 data.
Even a no-frills design deserves a high-quality driver stage, and that's exactly what we put on this Relay controller. Fast-reacting flyback diodes help shunt dangerous voltages away from the driver circuit.
To control this Relay Controller, simply connect a data and ground wire between the board and computer or microcontroller. Provide +12 Volts DC to the board, and send ASCII character codes to control the relays.
This Relay Controller is fully E3C complaint, allowing up to 256 NCD devices to share a single RS-232 serial port. Mix and match up to 256 devices in any combination. Speak to each device individually or all devices at once.
Connect this board 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.
Fully E3C Complaint RS232 Relay
Our RS-232 Relay Boards are fully E3C complaint, allowing up to 256 NCD devices to share a single RS-232 serial port. Mix and match up to 256 devices in any combination. Speak to each device individually or all devices at once.To control the this Relay Controller, simply connect a data and ground wire between the Relay Controller and computer or microcontroller. Provide +12 Volts DC to the board, and send ASCII character codes to control the relays.
Even a no-frills design deserves a high-quality driver stage, and that's exactly what we put on our Serial Relay Controllers. Fast-reacting flyback diodes help shunt dangerous voltages away from the driver circuit.
Features include no-click startup, LED status lights, and E3C compliance. Relays can be controlled at 9600 baud and the board is compatible with ANY computer or microcontroller capable of delivering RS-232 data.
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!
![]() 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 & N-Button Lite is software that allows you to configure buttons to control relays and read the status of those relays without programming. You can also create meters for reading variable input sensors connected to the board in real time! N-Button will allow you to create unlimited widgets and N-Button Lite will allow you to create up to 8 widgets.Relay Button widgets turn relays on/off directly. It has never been so easy to control relays before. | |||
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Relay Status widgets show status of the relay automatically right on the desktop! | |||
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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.
Save 40% on N-Button TodayLimited time offer! Order the N-Button Lite with a relay board and get it for the unbelievable price of just $29.00. That's a discount of 40% off the retail price! If you purchase the full N-Button it's just $99.00 with the purchase of a relay board and that's a 41% savings off retail price! Desktop control, sensor meters and backgrounds plus all the customization for just one low price, purchase your copy of N-Button Lite today.
Quick Start Kits
Also available is our QS12 Quick Start Kit. Kit includes a high quality regulated switcher supply, serial cables, and an RSIO adapter board used to add a standard serial and power connector to this relay controller. This Quick Start Kit can be purchased during checkout of this controller.
Resources
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NEW TO RS232 COMMUNICATIONS? GET STARTED HERE Click the above link for an exclusive article on RS232 Communications |
RS232 Relay Article | RS232 Relay Article |
NCD Base Station Software |
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Download Manual | Download the R45/R410 R85/R810 Pro Product Manual |
E3C Complient | Download E3C Complient Specs |
NCD Component Library | The NCD Component Library is a Plug-In for Visual Studio 2005/2008 that greatly reduces software development time, effectively reducing most control operations to a single line of code. This free download includes four example applications compatible with the Pro Series. |
Wiring Diagrams | These wiring diagrams will help you understand how to connect to your devices and use relays as a form of control logic |
RS232 Controller - 4-Channel 5-Amp DPDT<br/>Pro Series with Screw Terminal Connections
R45DPDTCN
4-Channel 5-Amp DPDT RS-232 Relay Controller with Relay Interface
