2
Power supply (12V, GND): 12V DC, please pay attention to “+, -” of power supply�
Fire alarm linkage contact (ALARM1, ALARM2): Short circuit the ALARM1 and ALARM2
(Reserved port)�
Third party interface (B1, A1): A1 — 485+, B1—485-(Reserved port)�
Communication port (B2, A2): It is used for connecting converter, please pay attention to “+, -”,
A2—485+, B2—485-�
Note: B1, A1 are unavailable to the Split Controller; B2, A2 are available�
Part information for controller
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