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Control Systems

Impulse III

Impulse III is the latest release from the family of successful CMI Impulse asphalt plant control systems. Built on the extensive experience gained from past Impulse systems, it uses state of the art hardware to provide a long term upgrade path.

Using the latest Rockwell software platform and Compact Logix PLC, Impulse III has been developed with the operator and management in mind, keeping it user friendly yet offering extensive production and operational data.

Impulse III uses two high definition wide screen displays to allow the plant operation to be monitored on one display and all data including recipes, materials loading, fuel and energy usage, alarm and materials logging etc., to be monitored and accessed on the second display.

The second display allows asphalt production to continue to be monitored whilst recipes or any logged data is accessed independently of production.

All data can be exported as Excel files for viewing or storing on other PC’s. Hint balloons are displayed by floating the mouse over text and a full help library is available upon clicking on “?” icons. Access to the materials logging database is accessible via the customer’s network as is remote dialup via a second network interface to either monitor plant operation or for full diagnostic support.

  • Industry standard Allen-Bradley / Rockwell hardware and software for future proof operation
  • Industrial grade fanless PC for maximum reliability
  • Twin high definition wide screen displays that allow multiple functions to be viewed concurrently
  • Software specifically designed in house by CMI with multiple options
  • Online monitoring available and full diagnostic support
  • Fully compatible with customers preferred truck loading system


  • Automatic proportioning of all mix materials
  • Automatic sequencing of mix startup and shutdown
  • Motor start/stop
  • Safety interlocks
  • Automatic burner control
  • Automatic baghouse cleaning and airflow control
  • Automatically change mixes “on the fly”
  • Reduces waste at startup and shutdown
  • “Hot Start” and “Hot Stop” functions
  • Automatic digitally controlled fuel-to-air ratios
  • PLC I/O status on screen
  • Verbally announced alarms
  • Remote access by CMI to allow problems to be diagnosed remotely

Control House Configurations

A full range of portable, split level and stationary control house and motor control centers are available all equipped with independent climate controls as standard.

cabin 16X12 2opt6
Portable Control House

Two 16 ft x 12 ft (4.87m x 3.65m) control houses with operators control room and a separate motor control center for more flexible plant layouts.

Split level
Portable Split-Level Control House

28 ft x 10 ft (8.53m x 3.04m) split-level control house incorporating individual motor control centre and operators control room on a single chassis. The control room is designed so that the operator has a higher vantage point to oversee plant operations with the added benefit of extra space underneath for storage.

static cabin
Stationary Control House

30 ft x 12 ft (9.14m x 3.65m) stationary control house for larger, longer term installations incorporating individual motor control center and operators control room.


Extensive data logging and use of all materials
Production data available over customers network or email daily via second Ethernet port
Detailed bar graphs for production deviation/compliance reports
Full alarm logging to help reduce plant downtime

Find Out More


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Impulse III Control System Brochure