ECL-203 Series

ECL-203 Series

The ECL-203 Series controllers are microprocessor-based programmable controllers designed to control terminal units such as rooftop units, fan coil units, unit ventilators, heat pump units, air handling units, and chilled ceilings. The ECL-203 Series controllers use the LonTalk® communication protocol and is LONMARK certified as an SCC Generic device, guaranteeing compatibility and interoperability with other manufacturers’ LONMARK certified controllers.

These controllers meet the requirements of the following applications: Rooftop Units, Fan Coil Units, Chilled Ceilings, Heat Pumps, Unit Ventilators and Small Air Handling Units

ECL-203 Series

LONMARK® Certified 14-Point Programmable Controllers
  • Flexible Inputs and Outputs

    This controller has various input types including resistance, voltage, and digital-based ones. Moreover, it provides digital, floating, pulse width modulation, and proportional control outputs for valves, heating elements, fans, and lighting applications. This controller covers all industry-standard HVAC unitary applications.

  • Highly Accurate Universal Inputs

    Highly accurate universal inputs support thermistors and resistance temperature detectors (RTDs) that range from 0 Ohms to 350,000 Ohms, as well as support for inputs requiring 0 to 10VDC or 0 to 20mA with an external resistor. This provides the freedom of using your preferred or engineer-specified sensors, in addition to any existing ones.



Supports EC-gfxProgram

Supports Distech Controls’ EC-gfxProgram, which makes Building Automation System (BAS) programming effortless by allowing you to visually assemble building blocks together to create a custom control sequence for any HVAC / building automation application.

  • Rugged Inputs/Outputs

    Rugged hardware inputs and outputs eliminate need for external protection components, such as diodes for 12V DC relays.

  • Environmental Protection

    The ECL-203 model with Environmental Protection has a conformal coating applied to its circuit board for an extra degree of protection for use in humid regions and it is ideal for enclosed roof-top unit applications.

  • Open-to-Wireless

    The controllers are Open-to-Wireless™ ready, and when paired with the Wireless Receiver, work with a variety of wireless battery-less sensors and switches, to reduce the cost of installation and minimize the impact on existing partition walls. Available with an optional Wireless Receiver that supports up to 24 wireless inputs to create wire-free installations.

Allure™ Series

Communicating Sensor Support

These controllers work with a wide range of sensors, such as the Allure Series Communicating Sensors that are designed to provide intelligent sensing and control devices for increased user experience and energy efficiency

  • Allure EC-Smart-Vue sensors feature a backlit-display and graphical menus that provide precise environmental zone control, with any combination of the following: temperature, humidity, CO2 , and motion sensor
  • Allure EC-Smart-Comfort sensors feature colored LED indicators to provide user feedback, rotary knobs to adjust the setpoint offset and fan speed, and an occupancy override push button. This sensor can also be expanded with a combination of up to 4 add-on push button modules for lighting and shade/ sunblind control.
  • Allure EC-Smart-Air sensors combine precise environmental sensing in a discreet and alluring enclosure for temperature, humidity, and CO2 .


  • Custom programming of applications
  • 6 universal inputs
  • 5 digital (Triac) outputs
  • 3 universal outputs
  • Scheduler objects with 7 weekday templates and 4 holiday templates per scheduler
  • Some models available with environmental protection
  • ECL-253 includes live graphics color display (integrated LCD operator interface)
  • Supports up to 4 Allure series communicating sensors
  • Open-to-Wireless™ Solution: support of wireless battery-less inputs
  • LonMark® certified
  • LonMark® certified controllers designed to meet oil and gas industry standards