Product Code: R830
Setup for the R85Pro 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.

Learn how computer controlled relays communicate and control

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

Learn about Induction Suppression and how to counter it using Capacitors

Learn how to find the Com Port that your Device is using

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!
Control All or Individual Relays with Two-Way Communication
Quick Start Kit Available for Easy RS232 Connection
Highly Reliable Relay Board For Demanding Applications
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. The Command Set can be found in the Product Manual.
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.
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.
![]() 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. |
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.
![]() |
NEW TO RS232 COMMUNICATIONS? GET STARTED HERE Click the above link for an exclusive article on RS232 Communications |
| RS232 Relay Article | RS232 Relay Article |
| 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 |
8-Channel 30-Amp SPST High-Power Relay Controller Board | |
|
Quantity in Basket:
None
Code: R830 Price: $249.00 Shipping Weight: 2.00 pounds | |
| 8-Channel 30-Amp SPST High-Power Relay Controller Board | |
Computer Control
Stand-Alone
Additional Products
Product Support
| SECURE SERVER |
|
Visit one of our other great web sites: www.SignalSwitch.com www.controlanything.com |
|
National Control Devices, LLCWorld's Largest Manufacturer of Computer Controlled Switching Devices Since 1995. |
|
Please Note: Our office will be closed for Memorial Day on May 28th.