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Modbus Displays and IO Modules | SRI-P75-MOD Colour Touchscreen Modbus Interface, Schedule, Extra Low Voltage

Colour Touchscreen Modbus Interface, Schedule, Extra Low Voltage

Datasheet (1943kB)

SRTI-75 are attractive flush mounted room interfaces with a large colour intuitive 3.5” touchsreen for viewing the system status and modifying the settings. The 320x480 pixel 255K touchscreen provides a dynamic sharp graphical interface to the HVAC systems. The SRI room interfaces connect to BACnet and Modbus networks.

The SRI-75 features include; setpoint adjustment, fan speed adjustment, operating mode adjustment, party (boost) mode, OFF mode, ECO mode, frost condition display, built-in temperature and two external temperature display or three network temperature displays, lock modes, cleaning modes, selectable temperature description, celcius/Fahrenheit description and temperature selection, 'energy ring' showing system status at glance, AC enable button, lights enable button and password protected configuration screens. The programmable version has 7 day schedule with ON/OFF operation.

The SRI-75 have built-in temperature reading, two resistive inputs for network measurement, digital input for status monitoring and 24Vac/dc 5A relay for switching equipment. The RH option provides additonal humidity measurement.


  • 24Vac/dc Power Supply
  • 3.5” Colour Responsive Resistive Touchscreen, 320 x 480 Pixels
  • BACnet and Modbus Communication
  • Flush mounted to the US, UK or European Wall Mounting Box
  • Modern Designer Look with Black/Chrome Colour Scheme
  • Attractive Simple to Use Graphical User Interface (GUI)
  • Setpoint Adjustment using Up & Down Arrows (temperature / percentage)
  • Energy Ring Advising the System Status at Glance (up to 10 colour option including automatic change based on setpoint and measured value)
  • Three temperature displays for either network values, or built-in temperature and two external resistive inputs
  • Fan speed display and override icons (1, 2- 3-, 6- speed options with multi-colour or single colour display)
  • AC Enable Button and Display
  • Lights Enable Button and Display
  • Operation Mode Display and Selection (Auto, Heat, Cool, Fan)
  • ECO mode, OFF mode for system operation
  • Party Mode Button (boost) for a timed period
  • Cleaning Mode
  • Lockable Screen with 4-Digit Lock Code
  • Number of Lock Screen Options depending on the Applications
  • Maintenance Mode Password Protected
  • BACnet MS/TP Communication Models (-BAC)
  • Modbus RTU Communication Models (-MOD)
  • Humidity Sensor Option for Internal Humidity Display and Monitoring

Modbus and BACnet Networking Examples:-

The SRI-70/75 Series BACnet touchscreen room interfaces and Modbus room interfaces are linked to building automation and home automation systems using the industry standard BACnet and Modbus protocols guaranteeing interoperability. Integration can be done to most systems such as Crestron and Control4, Trend, Tridium, Honeywell, Alerton, Automated Logic, Distech, Priva and SyxthSense Sedona solutions. The standard Modbus and BACnet implementation guarantee interoperability.

SRT Modbus and BACnet networking Examples

Select from SRT-Relative-Humidity-Option:
Relative Humidity Option for SyxthSense Touchscreen Range
Select from CO2-Sensor-Option:
CO2 Sensor Option, 0-5000ppm
Select from Enclosure-Colour-Option:
White Colour Enclosure Option RAL9010