Solid State Relays offer a Practical Alternative to Mechanical Relays!
Mechanical Relays have a good home in low-cost control applications. But for some users, only solid state switching will do. Solid State Relays are ideal for users who require long term reliability, silent operation, or high induction tolerance. Many inductive control applications require a solid state relay. Inductive loads such as Motors, Valves, Pumps, Solenoids, and Large Transformers (including Fluorescent Lighting) benefit from the use of solid state relays because they reduce the chances of the inductive load interfering with the logic of the relay controller.
Simply connect the RS232 Relay Controller to the Serial Port of your computer and power up the device. In no time you'll be talking to the board and any attached Expansion Boards. You may also connect to a USB Port using an
RS232 to USB Adapter.
About Serial Communications
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.
What is ProXR?
ProXR refers to a
set of standardized commands used for computer control and data collection. A controller that supports the ProXR command set is a controller that is built to control up to 256 relays, using commands that can be sent to any controller that offers ProXR compatibility. This allows software developers to create programs for our products, then upgrade or change connectivity options without having to rewrite their software. ProXR commands can be sent to our controllers via the RS-232 serial port, the USB port, Bluetooth, Fiber Optic, Wireless ZigBee/Mesh, Ethernet, and Wi-Fi 802.11b...all without rewriting your software....simply develop your programs to work with the serial port of your computer. Let ProXR controllers manage the rest. Detailed information about the ProXR command set can be found in the
ProXR Manual.
Building a solid foundation for future hardware is what ProXR is all about. We have worked hard to modularize the ProXR firmware in such a way that it can support growth of features without sacrificing backward compatibility. Most controllers produced from 2007 onward will support our ProXR command set. These controllers will also include a XR Expansion Port, allowing you to add relays to any controller you choose. So if your needs for computer control increase, our controllers will be ready for your growth.
With all the control and backward/forward compatibility you have come to expect from the ProXR series command set, this controller allow you to send simple commands to activate relays, read the status of relays, activate up to 16 relay timers, and control up to 256 total relays using the XR expansion port. All relays are electronically latched, simply send a command to turn the relay on, send a different command to turn the relay off.
A/D Conversion
Analog to Digital Conversion allows you to read voltage levels from 0-5 volts using 8-bit or 10-bit resolution. This is particularly useful for reading temperature sensors (one temperature sensor is built into the board, shared with analog input number 8). A/D Inputs are also useful for reading light level sensors, thermocouples, switch closures, or just about any other kind of sensor you can think of. Built-In Pull-Up/Down Resistors keep the inputs quiet. Eight Different A/D Sample programs are available in the
NCD Component Library. These samples are available as a free download and are compatible with Visual Studio. We've got sensors! Visit our Sensor Page for sensors that have been tested and work with all NCD A/D Boards controller.
Read More About Analog to Digital Conversion
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.
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Quick Start Kit: QS12 |
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Quick Start Kits provide everything you need to begin using your RS232 relay controller. Kit includes a high quality regulated switcher supply, serial cable, and RSIO adapter (shown below). |
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QS12 |
$49 |
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