KTA-223 ‘Relayduino’ USB/RS485 IO Module
The KTA-223 is a USB or RS485 controlled IO module for interfacing PCs to real world applications, such as controlling lights and sprinkler systems, reading sensors and monitoring switches and other digital signals. The Relays are capable of switching up to 5A at 250VAC, 10A at 120VAC and 10A at 24VDC but the PCB tracks will only handle up to about 5A. A simple ASCII protocol allows control from Windows/Mac/Linux using either USB Virtual COM drivers or RS485. Additionally, multiple devices can be connected to one RS485 bus, allowing control
of many devices from one USB port.

The controller is based on the hardware of the Arduino physical computing controllers. It can be programmed as a stand-alone controller using the free, open source Arduino environment. Internally, the controller is “shield compatible”, allowing the use of many extension boards designed for the Arduino Deumilanove. As shipped the controller is loaded with a sketch or program that receives simple commands over the USB or RS485 serial port and switches relays or responds with the status of digital and analog inputs. 

Multiple controllers can be connected to one or more PCs in an RS485 network. Each controller can be assigned an address and will respond to commands addressed to them.

Light Flasher Software
Our Light Flasher software for the KTA-223 allows you to sequence the relays in patterns.  This is designed for Christmas lights, trapshooting and other simple time loop controls.

Available as a Kit or assembled version

Download Manual

Download Schematic

Arduino Sketch

VB2K8 Test Software & Source

VB6 Test Software & Source

Delphi Light Flasher Software & Source

Time-A-Relay.zif

• 8 Relay Outputs 5A 250VAC
• 4 Opto-Isolated Inputs 5-30VDC
• 3 Analog Inputs (10 bit)
• Connections via Pluggable Screw Terminals
• 0-5V or 0-20mA Analog Inputs, Jumper Selectable
• 5A Relay Switching
• Power Indicator LED
• All enclosed in Professional looking plastic case
• Arduino Compatible
• Accepts Arduino Shields (Ethernet / XBee)
• USB Virtual COM or RS485 Input
• Easily connect multiple units far apart by RS485

Software
An example program has been written in both Visual Basic 6 and VB .Net to show you how to interface with the KTA-223 using a PC.