The iSMA-B-AAC20 is an advanced control device to building automation and HVAC systems. Using SVM (Sedona Virtual Machine) allows the user to quickly and easily program in real time. Large number of inputs and outputs allows to integrate with other devices and sensors (AAC20 provides 8xUI, 4xDI, 4/6xAO and 4xDO). Legible, fully programmable LCD, can be used as simple interface to local operation of system. Built-in RS485 can be used to expand number of I/O by connecting MINI or MIX series I/O modules using Modbus ASCII/RTU. In addition, to increase the versatility of the controller, it supports many open communications protocols: BACnet, Modbus, SOX, DALI, M-Bus, 1-Wire or oBIX. The AAC20 is mounted in a housing adapted for DIN rail mounting or directly on a panel. Separate, easy to remove connectors allow quick wiring without removing the entire module.


  • Sedona Framework 1.2 support
  • Real Time Clock (RTC)
  • Configuration via web
  • 2x Fast Ethernet with built-in switch
  • RS485 port (Modbus or BACnet)
  • Built-in Modbus Gateway TCP/IP to RS485
  • DALI Interface: built-in power supply (option)
  • M-Bus Interface: up to 20 devices (option)
  • 1-Wire Interface
  • USB Host Interface
  • Built-in LCD Display (option)
  • Micro SD card slot to log historical data and alarms
  • Fast processor with ARM dual core 204MHz