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iSMA-B-AAC20 Hardware User Manual
www.ismacontrolli.com
DMP239en | 1st Issue rev. 0 | 02/2022
page 8 of 42
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4 Hardware Specification
4.1 Hardware Versions
The iSMA-B-AAC20 controller is an advanced control device for building automation and
HVAC systems. The controller is based in the Sedona Virtual Machine (SVM), which allows
the user to quickly and easily program the controller in real time. Large number of inputs
and outputs allows to integrate with other devices and sensors (AAC20 provides 8 UI, 4
DI, 6 AO, and 4 DO). In addition, to increase the versatility of the controller, it supports
many open communications protocols such as BACnet, Modbus, SOX, DALI, M-Bus, 1-
Wire. 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 device.
The iSMA-B-AAC20 controller comes in six versions depending on native communication
protocols and hardware types (basic version and LCD equipped version, see
Front Panel for iSMA-B-AAC20-LCD
iSMA-B-AAC20: basic hardware version, native protocols: Modbus, BACnet, display
port, 1-Wire, and
iSMA-B-AAC20-LCD: LCD display, native protocols: Modbus, BACnet, display port, 1-
Wire:
Figure 7. AAC20 basic communication protocols version
iSMA-B-AAC20-M: basic hardware version, native protocols: Modbus, BACnet, display
port, 1-Wire, M-Bus, and
iSMA-B-AAC20-LCD-M: LCD display, native protocols: Modbus, BACnet, display port, 1-
Wire, M-Bus: