Modbus Protocol Overview:
Modbus is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its PLCs (Programmable Logic Controllers). Simple and robust, it has since become a de facto standard communication protocol, and it is now a commonly available means of connecting industrial electronic devices. The main reasons for the use of Modbus in the industrial environment are:
Further general information on Modbus can be found on The Modbus Organization website FAQ >>
The following Intech Micro Remote I/O Stations / Intelligent Multiplexers all include Modbus as standard ex factory.
View specific Intech Micro Modbus Tech Support information (including Modbus test program download [also available within Station Programmer software.]).
This station has all the friendly features of a monitoring station. The Isolated Universal Analogue Inputs are software programmable using the user friendly Station Programmer software.
Each input can be configured for any of the following inputs: RTD Pt100/Pt1000, Thermocouple, mA, mV, V & Pulse/Digital.
Also available as the 2400-A16-SD-NET with stand-alone data logging capability.
The 2400-A16 / 2400-A16-NET will auto-detect Modbus operation.
The Intech Micro 2300 series is a system of modular I/O Remote Stations, which add an even lower cost option to Intech’s already extensive intelligent I/O Remote Station family, which connect automatically to the Intech MicroScan V5 logging plus SCADA software package.
The 2300 series I/O stations are made up of stand-alone Digital and Analogue—Input/Output stations. Inputs etc are programmed using the IOStudio Modbus Configuration Software.
Modbus supplementary manual links for each model can be found on the 2300 series product information page.
Important: The 2300-XX stations cannot share a data hi-way with the 2400-XX / 2100-XX stations and/or Shimaden Controllers.
16 Universal Analogue Inputs that are software programmable using the user friendly Station Programmer software.
Each input can be configured for any of the following inputs: Thermocouple, RTD Pt100, Pt1000, mA, mV & V.
2100-A16-NET - Ethernet TCP/IP Adapter
Using Modbus requires a jumper change, once all programming has taken place.
Please Note: Intech Instruments Ltd are the New Zealand representative for eze System, Inc products.
Please contact the eze System representative in your country if you require sales or service support for eze System, Inc products.
The eze System is suitable for a wide range of measuring, logging and alarm applications – from temperature, level, flow, analytical pH etc, energy, run & fault conditions, door switches and security and so on.
The system is designed to be easy to install and deploy in anything from single sites to hundreds spread out over a wide area and across the globe.
There are two models of the controller, having different connectivity options. Both models have Ethernet LAN connectivity, 2400-A16 support, Modbus, four analogue inputs and two relays. The ezeio-GSM model also has 3G/GSM cellular connectivity available.
The Modbus-RTU RS-485 port on the ezeio controller can be used to connect to Intech Micro Remote Stations that have Modbus RTU protocol support: 2400-A16, the 2300 Series and 2100-A16.
This allows the controller to be easily expanded to log up to 40 channels Max per ezeio controller.
If additional relay outputs are required, up to two 16x relay 2400-R2 units can be connected to a 2400-A16 for relay expansion - refer to the 2400-A16 Installation Guide for more information. Alternatively the 4x relay 2300-RO4 can also be used for relay expansion.
Modbus can be added to each of the following Shimaden Controllers via the addition of the Comms option when purchasing.
Please Note: Intech Instruments Ltd are the New Zealand distributor for Shimaden products.
Please contact the Shimaden distributor in your country if you require sales or service support for Shimaden products.
The SR90 digital controller series are the most popular controllers in the Shimaden range. The SR90 series is extremely versatile which makes it suitable for a wide range of applications.
The SR23 is a high accuracy digital controller. Replaces the discontinued SR253 - Program Controller.
The FP23 is a high accuracy programmable controller.
The SD16A & KR16A series are designed for the control of temperature, humidity and other physical values of general industrial equipment.
Note: The SD16 is the older model of the SD16A.
The SD24 & KR16A series are designed for the control of temperature, humidity and other physical values of general industrial equipment.
Modbus can be added to each of the following Process Indicators via the addition of the Comms option when purchasing.
Relative Humidity and Temperature Indicator/Transmitter with Independent Outputs.
For use with the WDT-DW - Wet & Dry Bulb Humidity Tank.
The IN-P is a multifunctional indicator which not only interfaces smoothly with a wide range of PLC and monitoring systems, but also as a stand alone unit for single and multi input Indication - Alarm - Control.
The IN-RT indicator is the ideal solution for a variety of flow rate application requirements.
The IN-RTB controller is the ideal solution for a variety of flow rate and batching applications.