CDVI A22 - Expander Modules to the Controller

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EN
ATRIUM A22
2-Door Controller
INSTALLATION MANUAL
EN
ATRIUM A22
2-Door Controller
INSTALLATION MANUAL
EXPANDER MODULES TO THE CONTROLLER
The A22 has a RS485 LOCAL BUS terminal allowing the connection with the ATRIUM expander module. The
RS485 LOCAL BUS communication is up to 1220 m (4000 ft) maximum distance. One A22 can support up to
four A22 expansion modules. Refer to “Module type conguration (controller or expander)” on page 15 to set
an A22 as an expander.
Connect the expander modules using these topologies:
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A22
A22 A22 A22 A22
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A22
A22
A22
A22
A22
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A22
A22 A22 A22 A22
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A22
A22
A22
A22
A22
DAISY CHAIN
BUS
MIXED
DAISY CHAIN/BUS/STAR
STAR