Modbus I/O Module 12VDC Powered

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Click here for full documentation

Download Test Utility Program

Features
8 Relay outputs (5A, 250VAC contacts)
4 Opto-Isolated Inputs with counters
3 Analog Inputs (10 bit) jumper-selectable for 0-5V or 0-20mA
4 Input Counters
RS485 or USB (virtual serial port)
Can be used as a USB to RS485 converter
Watchdog Timer resets the unit when communication from the network master is lost
Connections via Pluggable Screw Terminals
1200-38400 Baud Modbus Slave Device

Specifications
Power Supply Vs and COM:
KTA-224: 9-16V DC (12V Nominal) ~200mA + External 5V drain
KTB-224: 18-32V DC (24V Nominal) ~200mA + External 5V drain
Analog Input ANx:
0-5V: ~500kΩ effective resistance with no jumper installed
0-20mA: ~250Ω effective resistance with jumper installed
Opto-Isolated Input: 0-30V, ~1kΩ effective resistance
Relay Outputs: SPDT relays rated to 5A (resistive). 250VAC / 30VDC
5V Auxiliary Supply 5V: 200mA

Description: The KTA-224 is a Modbus Slave IO module for interfacing to any PLC or PC using the Modbus protocol. It behaves as a Modbus Slave and Relays, Inputs and Outputs are controlled by writing to and reading from the Coils and Holding Registers. It can be used for many applications such as controlling lights and sprinkler systems, reading sensors and monitoring switches and other digital signals, or even for industrial control.

The module can connect to a standard RS485 2-wire half duplex network or to a computer via USB. When connected via USB, the module acts as a USB to RS485 converter and multiple IO units (or other Modbus devices) can be connected to the RS485 bus. USB drivers are available for Windows, Mac and Linux.

The user can save a set of output statuses to be loaded when the unit is powered up or reset. A watchdog timer can be configured to reset the unit after a user-definable number of seconds since the last communication from a Modbus master.

Quantity	Price
1 – 9	$144.59
10 – 99	$141.95
100 +	$136.95

Skill Level of Item:		Assembled and Tested
Product #		KTA-224
Quantity Available:		4

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USB/RS485 I/O Controller (Relayduino)

KTA-223 ‘Relayduino’ USB/RS485 IO Module:

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Features:

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 Serial Port or RS485 Input
Easily connect multiple units far apart by RS485

Quantity	Price
1 – 9	$139.95
10 – 99	$127.58
100 +	$123.32

Skill Level of Item:		Assembled and Tested
Product #		KTA-223
Quantity Available:		5

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Click here for specs, downloads and more pictures.

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8 Relay 8 Analog USB IO Controller 12 V

Description: The KTA-225 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 or analog 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 KTA-225 has relays with 12 V DC coils and requires an 9 to 15 V DC supply.

This controller is based on the hardware of the KTA-223 controller, but the number of analog inputs has been increased at the cost of the digital inputs. 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 the 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.

Features:

8 Relay Outputs 5A 250VAC
8 Analog Inputs (10 bit)
Connections via Pluggable Screw Terminals
0-5V 0-3.3V 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 Serial Port or RS485 Input
Easily connect multiple units far apart by RS485

Quantity	Price
1 – 9	$152.62
10 – 99	$141.75
100 +	$137.03

Skill Level of Item:		Assembled and Tested
Product #		KTA-225
Quantity Available:		3