The A22 is a 2-door controller using the ATRIUM technology. By adding the A22 as a extension modules, eight additional doors can be connected to the A22, which increases the total capacity to 10 doors. When using 10 x A22's and 40 x A22's as extentions modules, the capacity of the system increases to its maximum of 100 doors. The A22 has a built in web browser, an integral power supply and includes an RS485 communication bus with automatic detection (no risk of errors due to lack of jumpers or DIP switches).
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