AAC20-D controller is an advanced device to control building automation and HVAC systems. 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.

Built in RS485 can be use to expand number of I/O by connecting MINI or MIX series I/O modules. In addition, to increase the versatility of the controller it supports many open communications protocols like: BACnet, Modbus, SOX, 1-wire or oBIX (optional).

The controller provides DALI interface allows to integrate and manage up to 64 DALI devices. To increase versatility, the controller has built in DALI power supply – 130 mA.

“Out of box” the controller has a 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