The AAC20-M controller is an advanced device to control building automation and HVAC systems. The AAC20 provides 8xUI, 4xDI, 4/6xAO and 4xDO.

Use of SVM (Sedona Virtual Machine) allows for quick and easy programming in real time-anytime from anywhere.

The controller provides new extension ModBus which supports communication with electric, water and heat meters for up to 20 devices.

“Out of box” controller has built in Modbus Gateway TCP/IP to Modbus ASCII/RTU, enabling you to connect additional modules/devices that communicate via ModBus RS485 without programming it.


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Technical Specifications

Inputs & Outputs

All universal inputs have 16-bit resolution which support the following types of inputs:

  • Temperature input support the following types of sensors:
    10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1, Pt1000, Ni1000

For sensor Pt1000 and Ni1000 use only 16-bit resolution

  • Voltage input 0-10 V DC: input resistance 100 kΩ accuracy ±0,1% measurement resolution 3 mV @ 12bit and 1 mV @ 16bit
  • Current input 0-20 mA (external resistor 499Ω required)
  • Resistive input 0-1000 kΩ: measurement resolution for 20 kΩ load 20 Ω @ 12bit and 1 Ω @ 16bit
  • Dry contact input
  • Dry contact inputs
  • Fast pulse counter up to 100 Hz save in EEPROM memory

All analog outputs are equipped with 12-bit ADC provides 10 mV resolution and accuracy less than ±0,5%. They support the following output types:

  • Output 0-10 V DC maximum load up to 20 mA (AO6- 5 mA)
  • PWM: 0,01 Hz, 0,1 Hz, 1 Hz, 10 Hz, 100 Hz

AO5 and AO6 can only be use if 1-wire port is not in use, please notice for AO6 maximum current load is up to 5 mA

  • The relay outputs (NO) max. 3A, 230 V AC / 30 V DC

Additional Specifications

  • ARM Cortex-M4 204MHz
  • ARM Cortex-M0 204MHz
  • Interface RS485 half duplex
  • Baud rate: 2400 to 115200 bps
  • 2xEthernet with built in switch
  • 1-Wire Interface
  • M-bus Interface: up to 20 devices (options)
  • Micro SD card slot
  • USB Host Interface
  • Protocols: Modbus, BACnet, SOX, 1-wire, oBIX (optional)
  • 24 V AC / DC
  • Dimensions: 106x110x62 mm.
  • Construction: plastic, self-extinguishing (PC / ABS)
  • Mounting DIN (DIN EN 50022 standard)
  • Cooling: internal air circulation
  • Operating temperature: -10 ° C to 50 ° C
  • Storage temperature: -40 ° C to 85 ° C
  • Relative humidity: 5 to 95%, non-condensing
  • Degree of protection: IP40 – for indoor installation