Heating Cooling Controller With BACnet MS/TP Communication

In stock (2 items available)
  • Weight
    0.3 kg
  • SKU
    SXS-150

Multistage BACnet heating and cooling controller with backlight LCD display. 3 analogue 0..10V outputs, 2 digital outputs, 1 external auto-detect sensor, 1 digital input, built-in temperature sensor.

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The SRC-100 series controllers have been designed for zone heating and cooling control. The controllers have 3 analogue 0..10Vdc outputs and two digital outputs that can be configured for heating and cooling control. The controllers can operate as Proportional Only or as Proportional + Integral Controllers.

The controller can have up to 2 heating and cooling stages. The analogue outputs can be individually configured for any of the heating/cooling stages and digital outputs can be configured as 3-point, PWM (thermic) or On/Off control.

The controller setpoint can be adjusted -/+3°C (default) by rotating the potentiometer. The setpoint centre and setpoint limits can be adjusted in the configuration mode or via the configuration tool.

On the models without the display; red and blue LEDs indicate the controller operation in heating or cooling mode. In the display models, the display shows the heating and cooling modes, the current active actuator position, and the current temperature reading. When the setpoint is adjusted, the backlight is switched temporarily on and the current setpoint is displayed.

The controllers have built-in BACnet MS/TP RS-485 communication for connection to BMS systems.

  • Configurable Room and Zone Controllers
  • Up to 2 Heating and up to 2 Cooling stages
  • Address and Baud Rate Setting via Bit switch or via the Configuration Software
  • Built-In Temperature Sensor
  • External Auto-Detecting Temperature Sensor
  • Digital Input for Night Mode or Cooling Disable Override
  • Non-display version has red and blue LEDs indicating if the temperature is below or above the setpoint
  • Display versions show temperature, setpoint, heating / cooling mode, night mode
  • Display has configurable backlight level
  • Rotary knob for the setpoint adjustment
  • Configuration via two concealed buttons and LCD display (LDC display add-on available for non-display models)
  • Alternatively the configuration is done via SW-DCT-USB Windows based configuration tool


  • Power supply: 24Vac/dc
  • Outputs: 3 Analogue 0..10Vdc Outputs Configurable to Any of the Stages
  • Outputs: 2 Digital 24Vac Triac Outputs; Configurable for On/Off, PWM (Thermic) and 3-Point Control
  • Protocol: BACnet MS/TP RS-485 Communication
  • Interface: RS485, maximum 63 devices
  • Addressing: 0..63 via a bit switch; 0..247 via tool / network
  • Communication: 9k6/19k2/38k4/76k8 Baud; Parity None/Even/Odd, 1 or 2 Stop
  • Temperature: 0°C...+50°C (32..122°F)
  • Humidity: 0...95%rh (non-cond.)
  • Standards CE: Conformity CE Directive 2004/108/EY EN61000-6-3: 2001 (Generic Emission) EN61000-6-1: 2001 (Generic Immunity)
  • Degree of Protection: IP20
  • Housing: ABS Plastics, Self Extinguishing
  • Dimensions: W86 x H120 x D29mm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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