Design Guide | iC7 Series Air-cooled System Modules
X67
X80
X81
X25
+
+
–
–
e3
0b
j2
12
.1
1
Figure 31: Auxiliary Connections of the Power Unit
X25
AuxBus terminal
X80
Service 24 V DC supply terminal
X81
Control terminal
X67
24 V DC output terminal
6.14
AuxBus Communication
6.14.1
Usage of AuxBus
AuxBus enables communication for the filters. When AuxBus is connected, the drive provides temperature monitoring and other
diagnostics of the used options thus giving vital information about the system. AuxBus is also used to create warning and fault signals for
the system.
The AuxBus network topology is a 2-wire CAN-based bus line terminated at both ends by resistors. The connection includes a feedback
loop wire which disables automatic termination in the AuxBus board. The last AuxBus board automatically enables termination when
feedback is not present. Additional termination resistors are not necessary.
NOTICE
For the drive to be able to protect the filters, AuxBus must be connected.
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