Modulebus Connection - ABB Advant Controller 80 User Manual

Chapter 2 – AC 80 Hardware and Connections

ModuleBus Connection

ModuleBus is used for connecting I/O devices (or ABB drives) to the
AC 80. It is divided into electrical and optical busses which are logically
the same bus.
Electrical ModuleBus The electrical ModuleBus link is made up of I/O devices installed side
by side on the same mounting rail as the AC 80 itself. Extension cables
may also be used as shown below e.g. in order to install I/O devices of
different types onto different mounting rails. The bus is terminated at
the end with a TB807 terminator latch. The maximum length of the bus
is 2 metres including the AC 80, all I/O devices and extension cables.
Each I/O device consists of a module termination unit (MTU) and an
I/O module installed on it. For more information on the different I/O
devices available, refer to the S800 I/O User's Guide .
Optical ModuleBus The optical ModuleBus link is constructed as a ring on the optional
TB810/811 Optical Port, plugged onto the AC 80. The maximum
communication speeds for the TB810 and TB811 are 10 and 5 Mbit/s
respectively.
Each I/O cluster is built around a TB820 ModuleBus Optical Modem,
and forms an individual electrical ModuleBus. Each cluster is given a
cluster address using the selector on the TB820. Instructions for this as
well as other detailed information on the TB820 is available from the
S800 I/O User's Guide.
Size of the I/O Station The I/O station may contain 24 I/O devices at most, i.e. 12 devices on
the electrical and 12 on the optical ModuleBus. One I/O station can
handle up to 384 digital I/O signals or 192 analogue I/O signals. The
optical ModuleBus link may contain up to 7 I/O clusters.
The modules are addressed according to their physical order on the
bus.
AC 80 User's Manual 2-11