Startup guide for the iSMA I/O modules (iSMA MINI and iSMA MIX series IP)

Connecting and configuring the device

1) Power supply

You can use 20Vac to 28Vac or 20Vdc to 28Vdc

The power required (in VA when powered with 24Vac and in W when powered with 24Vdc) depends on the device model and can be found on the installation instructions enclosed with the device, or online on our support website HERE for the MIX series, and HERE for the MINI series.

The device can be powered from the USB mini port situated behind the front panel, next to the configuration dip-switches (should be used only for device configuration).

Check our article about best practice and recommendations on powering our devices HERE

2) IP port

The IP port uses a standard RJ45 connection.

3) Connecting a PC to the device

The USB mini port in front of all iSMA MIX and MINI devices allows to connect them to a PC for firmware update and configuration.

The cable required is a USB mini to USB A. The cable needs to be a power and data cable.

The software required on your PC is the iSMA Configurator. You can find the iSMA Configurator and related documentation HERE

4) Verify and update the firmware

This is very important: the first thing to do is to check and update the device firmware!

Detailed instructions on how to do this are available in the iSMA Configurator manual HERE on chapter 3.1

We have also a useful video showing the steps here below

5) You must restore the device default settings

Restoring the defaults after updating the firmware is recommended.

  1. Turn off the power supply
  2. Set dip-switch number 6 to ON
  3. Turn on the power supply; power LED blinks
  4. Set now the dip-switch number 6 to OFF to restore the default settings. To cancel the
    reset, turn off the power and set the dip-switch number 6 to OFF

See here below a video where we run through the procedure

6) Setting up the communication protocol

The protocol can be configured using the dip-switches and rotary switches or via the iSMA Configurator software. Note: Setting the dip-switches and rotary switches will take priority over any settings within the software.

To know more about how to set the device up using the dip-switches and rotary switches, and to know how that works with the Tridium Niagara framework, have a look

  • HERE for configuring it for Modbus
  • HERE for configuring it for BACnet

Please consult the Device manual for a full list of the data points available and more information about the protocol use.


7) Setting up the inputs/outputs type

The setup of the type of inputs (sensor, resistor, voltage, etc) and outputs can be done either using Modbus/BACnet configuration points, or simply via the iSMA Configurator software.

If you have a module enabled for IP communication, the setup of the inputs and outputs can be done also through the web interface of the device


8) Web interface configuration

All IP version modules are equipped with a web server, which allows the use of a browser to show the module status and changing the configuration.
To access the web server, open the browser and enter the IP address of the module (default IP address is

Use the following default credentials:
Username: platform
Password: 1000

For any more information on the Web Interface, please consult the device manual at the chapter "Web Configuration - IP version only"


9) RS485 serial port

On iSMA MIX and MINI "IP" devices the RS485 port is used only as a Modbus IP to Modbus RS485 gateway. A Modbus IP Master controller (like a Jace or MAC) will be able to poll a Modbus RS485 slave device connected to the iSMA MIX/MINI using it as a gateway.

The port is disabled if the iSMA MIX/MINI is configured for Bacnet communication.

The iSMA MIX and MINI series are non-optoisolated devices. More information on this can be found on our article about non-optoisolated device wiring HERE

Recommended cable from manufacturer is Belden 9842 (tech sheet).

Like on any RS485 network, correct network terminations will be required. Please follow our advice on the use of bias and termination resistors available HERE


Additional information

This guide applies to the following products

iSMA MIX series:


iSMA MINI series:


Where to find the documentation about this product

Data sheets, manuals, installation manuals, device pictures, CAD drawings and certificates can be found on our support website

  • HERE for the iSMA MIX series
  • HERE for the iSMA MINI series

What is inside the box

Inside the box you will find:

  • The iSMA I/O device
  • All the connectors (5.08mm MSTB screw down terminal blocks)
  • 200 ohm resistors set to connect 4-20mA signals to the Universal Inputs (only for devices provided with Universal Inputs)
  • The installation instructions