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Smart Relays: Crouzet Millenium 3 vs. Zelio Logic

crouzet millenium 3There are a number of smart relays, also called programmable logic relays, on the market and it can get confusing to find the best solution for your application.

Here is a quick comparison on the Crouzet Millenium 3 and the Zelio Logic.
Similar features of both the Zelio Logic and Crouzet Millenium 3:
  • The Zelio Logic controller and the Millenium 3 Essential have the same hardware platform.
  • Both controllers can be programmed in FBD and Ladder and both are available with relay or solid state (transistor) output versions.
  • Schneider Electric has recently released a new version of the Zelio software: V4.4.
  • This version includes 2 new function blocks which used to be exclusive to the Millenium 3: Sunrise and Solar Tracker.
Crouzet Millenium 3 advantages versus Zelio Logic:
  • You can program up to 700 function blocks (only 200 on the Zelio)
  • More than 99 function available (only 47 on the Zelio)
  • The maximum number of I/O's, including extension modules, is 50 (just 40 on the Zelio)
  • Extended temperature range up to +70°C on the Smart range
  • PWM outputs available on controllers with Transistor outputs
  • High speed input frequency is up to 7.6kHz (versus 1KHz on the Zelio)
  • Option for connecting NTC probes directly (Smart range)
  • Highly visible blue display (Smart range)
  • Option for adapting products
  • Option of resin coated board for harsher environments
Marshall Wolf Automation carries the Idec SmartRelay as well as the Crouzet Millenium series so we can find the best programmable logic relay for your application.

In-house tech support is always available!

Crouzet Millenium 3 Smart Control

The new Crouzet Millenium 3 Smart series has a number of new features including:Crouzet Millenium 3 smart controller

  • Back lit LCD blue screen
  • Up to 50 I/O
  • Ability to create a network allowing communication between up to 6 Millenium 3 units
  • Modbus communication: 2 x 8 words with read/write access

You can choose from compact or expandable, with or without a display, and digital and/or analog I/O.

The Crouzet Millenium 3 Smart series offers 700 memory blocks. There are 19 function blocks exclusive to the Millenium 3 Smart for industry-specific applications, communication and complex communications.

This controller is ideal for HVAC,
access control, heat pumps, water and air treatment applications!

Click here for more information on the Crouzet Millenium 3!

Let Marshall Wolf Automation help you cross your smart controller to the new Crouzet Millenium 3.

Crouzet Millenium 3 Smart Controllers

The new Crouzet Millenium 3 Smart series has a number of new features including:
  • Backlit LCD blue screen
  • crouzet millenium 3 smartUp to 50 I/O
  • Ability to create a network allowing communication between up to 6 Millenium 3 units
  • Modbus communication: 2 x 8 words with read/write access
You can choose from compact or expandable, with or without a display and digital and/or analog I/O.

The Crouzet Millenium 3 Smart series offers 700 memory blocks. There are 19 function blocks exclusive to the Millenium 3 Smart for industry-specific applications, communication and complex communications.

Marshall Wolf Automation is your authorized Crouzet industrial automation distributor!

Learn more about the Crouzet Millenium now!

Programmable Logic Controllers 101

What is a programmable logic controller?
According to the Crouzet website:
A logic controller is a programmable module. It can be used to control 
and monitor a set of conditions according to the state of the sensors, the 
crouzet millenium 3 smartpassing of time and the program created using a software workshop.

What can you replace with a programmable logic controller?
Counters, timers, level control, relays and temperature controllers.

The Crouzet Millenium 3 is the latest generation of micro-PLC's. The Millenium 3 is easy to program and offers communication capabilities.

The Crouzet Millenium 3 Smart has a blue screen which improves the readability of the display. It also features 76 slots available allowing the use of more application specific functions.

Marshall Wolf Automation is your authorized industrial automation distributor for the complete line of Crouzet Millenium, phase monitors, power supplies and much more!


Crouzet Millenium

The Millenium 3 Starter Kit has everything you need! 

As a simple introduction to the logic controller, its intuitive programming and how to set up your first installations, Crouzet offers two Starter Kits (Millenium 3 + programming cable + M3 SOFT software) — one for each of the standard and expandable versions.

Crouzet Millenium Starter KitThe Millenium 3 is easier than ever to program for simple timing, counting or logic functions, as well as complex systems using high-speed count, PID control or sequencing. Crouzet's ability to adapt these products for your application makes the M3 the right choice every time.

Marshall Wolf Automation is happy to help you with your logic controller needs.  Just call us today at 800-325-9653.  As your factory-authorized Industrial Automation Distributor we can also help you with other items that you might not see on our web site. 

Just give us a call or send an email to sales@wolfautomation.com.  We are happy to help you!

Crouzet Millenium: Application Stories Part 2

Crouzet Millenium Application #2:
Water Treatment


Do you own a pool, manufacture swimming pools or service pools? This application is going to focus on controlling water quality in a swimming pool.

As a pool owner, manufacturer or user you need to:
  • Control physical filtration of water
  • Set fitering time in relation to the temperature of bathing water
  • Control the pH of the water
  • Control the level of water disinfection

Using the Crouzet Millenium 3 XD10 24VDC logic controller, pH probe, ORP (Redox probe) and Pt100 probe, plus an application specific analog extension you can do the following.

millenium for swimming poolsWater needs to be filtered regularly to keep it clear. The higher the temperature the longer this takes.

Both pH and Redox are measured using probes submerged in pipes, a container or an analysis chamber. These probes will analyze the presence of hydrogen and chlorine ions capable of oxidizing an electrochemical couple with the probe.

This oxidation generates an electrical voltage, expressed in mV, which is forwarded to the PLC. After a calibration process the PLC converts this into values for the pH and Redox.

Additional Crouzet Millenium 3 functions are available for other requirements including lighting control, vacuum pumps for the pool cleaning brushes and more!

Marshall Wolf Automation is your authorized industrial automation distributor for the full line of Crouzet Millenium controllers, solid state relays, phase monitors and more!

Search all of our Crouzet products now!







Crouzet Millenium: Application Stories Part 1

Crouzet Millenium Application #1:
Heat Pumps

Make the most of natural energy - air, water - to heat or cool a hot water system or heating circuit.

Using a Millenium 3 logic controller and NTC and Pt100 accessories you can do the following:

The heat from the warm fluid is captured by a refrigerating liquid which is compressed to give it a pressure of 40 bar and a temperature of 140°.

In a heat exchanger, this refrigerating liquid then transfers its heat to water for a hot water system or a hot water tank.

Once this thermal exchange has taken place the fluid, which has lost both temperature and pressure, has its pressure further reduced by a solenoid valve which drastically reduces its temperature even more.

This fluid is then able to receive the heat from the hot source and the cycle is ready to begin again!

Marshall Wolf Automation is your authorized industrial automation distributor for the complete line of Crouzet Millenium programmable logic relays, solid state relays, timers and phase monitors.

Search all of our Crouzet products now!




Crouzet Millenium 101

I was looking through our latest Crouzet catalog and came across a great section describing logic controllers.

crouzet milleniumBasically it gives a simple description of what a logic controller is. Marshall Wolf Automation carries the IDEC SmartRelays and Crouzet Millenium programmable logic relays.

'A logic controller is a programmable module which is used to control small automation systems or small installations.

The logic controller is a plural solution in a control system since it contains solutions that can replace a number of products; timers, counters, control relays, temperature controllers, impulse relays, etc.

The logic controller operates as the brain of applications. It is capable of retrieving information and triggering actions; it can be adapted to suit the needs of customer applications.'


Actions that a Crouzet Millenium or IDEC Smart Relay logic controller can handle are controlling, measuring, managing and communicating.

Marshall Wolf Automation is your authorized industrial automation distributor for the full line of both IDEC Smart Relays and Crouzet Millenium programmable logic relays.

Search all of our programmable logic relays now!







Crouzet Millenium 3 Custom Renamed Millenium 3 Smart

Crouzet has announced the renaming of the popular Millenium 3 Custom programmable logic relay to Millenium 3 Smart in order to highlight the expanded capabilities.

crouzet millenium 3 The Crouzet Millenium 3 Smart is a programmable logic relay that incorporates a blue screen which improves the legibility of the display.

Effective immediately the Crouzet Millenium 3 Smart has 76 slots available which allows use of more application-specific functions in one program.

In similar news the Millenium 3 Standard is now called the Millenium 3 Essential.

Marshall Wolf Automation is your authorized distributor for the full Crouzet Millenium family of programmable logic relays!




Endless Applications for Logic Controllers - Smart Relays

smart relay logic controllerAre you using logic controllers (also called smart relays) in your application?

Many of our customers are still finding the many ways these units can help automate their applications.

Smart relays can be used to automate small devices requiring between 10 and 50 I/O.

Here are some additional application ideas:

Stretch wrapping machines - control the motor that unrolls the packing film, controls cutting the film and determines the duration of the motor cycles.

Automatic barriers - opening control of barriers with automatic vehicle detection and a function for selecting opening times/days.

Public lighting - control lighting to coincide with sunrise/sunset and save energy!

Field irrigation - irrigation control based on temperature humidity and day/night cycles.

Marshall Wolf Automation is your industrial automation distributor for both the Crouzet Millenium logic controllers and the IDEC SmartRelay controllers.

Learn more about our logic controllers and smart relays now!