Web-access options

Wired connection

Think of the controller as your own laptop, and by connecting it to a live Ethernet cable from your local network it has access to the internet.

Plug your Ethernet cable into the Network socket of the controller.


  • Benefit 1 – No extra hardware cost.  Network components are embedded within the controller’ electronics.
  • Benefit 2 – No annual fee subscription.
  • Benefit 3 – Seamless & stable solution. Reliable internet connection.

WIFI connection

If you have an active router on site, you can use it to establish an internet connection. In order to use this option CHEMTROL requires to install an additional electronics component – WIFI module.

The controller then communicates with the router via WIFI signal using the router’ username and password.

  • WIFI electronics module to be installed. 
  • Benefit – No annual fee subscription.
  • WIFI connectivity reception has to be checked on site.

Wireless connection using a router

Your controller can also be connected via a compatible 4G or 5G router with an Ethernet cable.

In order to use this option you are required to install a router within the controller and place a sim-card from one of the local Internet Service provider to establish web connection.

  • Benefit – Seamless & stable solution. Reliable internet connection.
  • Wireless router to be installed.
  • Annual sim-card subscription apply.

Shared wireless access & control

A unique feature that allows multiple controllers in close proximity to piggyback and share a WIFI signal. The major benefit of this is you only have to connect for a single Sim-card subscription but still have full connectivity and control over all your controllers.

How does it work?

Your main controller has an Ethernet cable connected with a 4G/5G WiFi router that accesses the internet.

All your other controllers in close proximity simply use a WiFi device to share or piggyback off the main controllers WiFi signal. This way you can add multiple controllers without paying for multiple subscriptions and save.

  • Main controller: 4G/5G WIFI router to be installed.
  • Secondary controller – WIFI electronics module has to be installed.
  • Annual sim-card subscription apply only for the main 4G/5G router /controller. 
  • Benefit 1 – Seamless & stable solution. Reliable internet connection.
  • Benefit 2 – Annual sim-card subscription do not apply for secondary controllers.

Building Management System (BMS) Communications

The CHEMTROL® programmable controllers range can be equipped to communicate to the facility Building Management System using a number of open protocol languages.

The most common of these languages being used today are:

  • Modbus IP
  • Modbus RTU
  • BACnet IP
  • BACnet MSTP
  • and LonWorks

The controllers can be configured with any of these languages.

To enable this type of communication, there will be a module installed inside the controller which will convert the language of the controller to the open protocol language.

4-20 mA Output Boards

There are several 4-20 mA Converter boards available for the CHEMTROL® programmable controllers range. They all work essentially the same way. They provide two connection terminals for the output current. Its purpose is to convert the digital outputs of the controller into analog signals that can be used by analog monitoring and control equipment.

To enable this type of communication, there will be a 4-20mA module installed inside the controller.

Chem Comm IV is a Ethernet based means of connecting Series 2100 and above over a local network.  Chem Comm does not utilize the Internet. Contact the factory to obtain your copy by email. You may download the user’s guide to determine if Chem Comm IV suits your requirements.