44 EM-ABS-01 for ACU 03/12
7 System bus interface
The CAN connection of the system bus is physically designed according to ISO-DIS
11898 (CAN High Speed). The bus topology is the line structure.
In the default version, the ACU series of frequency inverters supports a CAN protocol
controller. This controller can be used in the CM-CAN communication module with
CANopen interface as well as in an extension module for the system bus, such as the
EM-ABS-01 extension module.
7.1 Bus termination
The bus necessary on the phase in the physically first and last subscriber can be acti-
vated via the DIP switches on the EM-ABS-01 extension module.
• Set to ON (right position) for passive termination.
Atten-
tion!
By default, the bus termination is set to “1” (OFF, switch in left position).
CAN high (X410B.6)
120
Ω
CAN low (X410B.5)
Data line
Data line
assive
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