IRX2 MotorFix MAX
HMI and remote control options IRX2 offers two HMI options for greater flexibility on installation with surface or flush mounting. It is also possible to separately acquire a remote controller. Surface mounting HMI: available functions The IRX2 offers several functions accessible directly through the surface-mounted HMI, including drain, exhaust, swing/germicidal lamp control, timer, and automatic […]
User guide
Variable speed driver for evaporative air coolers

Mounted directly on the motor

Protection fuses on all outputs

Single-phase / two-phase 220 Vac power supply for three-phase motors from 0,5 to 2,0 HP
IRX, the well established line of VSDs for evaporative air cooling has evolved! Meet IRX2 MotorFix MAX!
Projected to decrease costs and make the installation easier, all versions of IRX2 MotorFix are mounted directly on the motor of fans, exhaustors and evaporative air coolers.
IRX2 MotorFix MAX keeps all the resources of the PRO version and adds two main functions: network operation with other MAX inverters (using the IRX MultiCom HMI), enabling centralized control, and features an STO (Safe Torque Off) input to disable the control module in case of an emergency stop. These improvements make the IRX2 MotorFix MAX a safer, more integrated, and efficient solution for evaporative air coolers.
Using the MAX model with HMI MultiCom and WebFi allows for managing up to 16 drivers in a network through the FlowIRX app.
Recommended motor potency: 1/2 HP (IRX2 MotorFix MAX 05) / 1 HP (IRX2 MotorFix MAX 10) / 2 HP (IRX2 MotorFix MAX 20);
Rated output current: 2,6 A (IRX2 MotorFix MAX 05) / 4,0 A (IRX2 MotorFix MAX 10) / 7,3 A (IRX2 MotorFix MAX 20);
Maximum output current: 3,4 A (IRX2 MotorFix MAX 05) / 5,2 A (IRX2 MotorFix MAX 10) / 9,5 A (IRX2 MotorFix MAX 20);
Maximum input current: 4,0 A (IRX2 MotorFix MAX 05) / 8,0 A (IRX2 MotorFix MAX 10) / 13,0 A (IRX2 MotorFix MAX 20);
Temperature of protection: 100 ºC;
Input voltage (±10 %): Single-phase / two-phase 220 Vac;
Input frequency: (50 to 60) Hz;
Rated motor frequency: (50 to 60) Hz;
Output frequency: (1 to 90) Hz;
Switching frequency: (5 , 10 or 15) kHz;
Control type: V/F;
Operating temperature: 0 to 50 °C;
Relative humidity: (0 to 90) % RH;
Optocoupled NPN digital inputs: S1 and S2;
Relay outputs: 3 NO contacts – 2 A / 220 VAC per contact.

HMI and remote control options
IRX2 offers two HMI options for greater flexibility on installation with surface or flush mounting. It is also possible to separately acquire a remote controller.
Surface mounting HMI: available functions
The IRX2 offers several functions accessible directly through the surface-mounted HMI, including drain, exhaust, swing/germicidal lamp control, timer, and automatic or manual mode selection.


Flush mounting HMI: available functions
The flush-mount IRX2 HMI provides the main navigation and control functions, such as speed increase, speed decrease, and configuration. Compact and intuitive, it was designed to ensure easy installation and convenient daily operation.
Directly coupled to the motor
For reducing installation time and costs and making the mounting easier, we projected IRX2 MotorFix to be coupled directly on the induction motor.


Mounting with screws and insulating rubber
MotorFix is coupled to the motor using screws with an insulating rubber piece that ensures firm fixing and vibration absorption.
Enclosure with aluminum heat sink
Exclusive design with a built-in aluminum sink, ensuring great performance in ventilation, climatizing and exhaustion applications.


Installation with cable glands
For mechanical resistance, IRX2 MotorFix is installed with cable glands, ensuring the integrity of cables.
Includes protection fuses
Besides the elevated terminals that make for easier handling and installation, IRX2 MotorFix has individual fuses on each output. This configuration ensures greater protection, preventing damage to the driver’s components.


RJ45 communication
The HMI communicates with the driver module through a CAT5e cable with RJ45 connection. The air cooler accompanies a standard 5 meters long cable, but it is possible to use a CAT5e cable up to 50 meters long, allowing for the ideal length for your application.
Programming key mode
IRX2 MotorFix’s HMI can function as a programming key, recording parameters to be “copied” and “pasted” in other IRX2 drivers. This mode is very practical, especially for machine manufacturers because it considerably reduces the drivers’ configuration time.


Flame-retardant enclosure and cable glands
The enclosure and cable glands are made of flame-retardant materials, ensuring that fire doesn’t spread. This reflects our commitment to safety, ensuring that both the installation and the evaporative cooler are protected against any issues that may originate from the equipment. In addition, the polycarbonate enclosure is resistant to impact and abrasion, providing durability and reliability.
Two digital inputs
The IRX2 MotorFix MAX features two digital inputs that enhance its functionality and safety. One allows the connection of a level sensor, protecting the pump against dry running and preventing damage such as motor burnout. The other input works as a start/stop command, making it ideal for integration with automation systems and enabling control beyond the HMI and remote control.


Automatic temperature mode
With the IRX2 MotorFix, greater thermal comfort and energy efficiency can be achieved thanks to its automatic operation, which turns the evaporative cooler on or off to reach the configured target temperature. The unit includes an NTC 10k temperature sensor that can be installed in the surface-mounted HMI for monitoring. When automatic mode is activated, the cooler manages the systems efficiently, ensuring proper temperature control.
Compatible with HMI MultiCom
IRX2 MotorFix MAX is compatible with the HMI MultiCom, connecting up to 16 drivers per HMI. With HMI MultiCom + WebFi, the drivers can be integrated with the FlowIRX app, allowing for remote control and monitoring, sharing access to your devices and activation scheduling.

