ABB Advant Controller 80 User Manual

Chapter 2 – AC 80 Hardware and Connections
AC 80 User’s Manual 2-13
DriveBus Connection The optical DriveBus link (Channel 0 on the NCB board) can be used
for controlling 12 NAMC-based drives, inverter units or supply units.
The connection of multiple drives requires the use of a branching unit
(NDBU), which enables the construction of a logical bus with physical
star topology. Branching units can be chained together.
Figure 2-8 DriveBus topology.
DriveBus uses a communication speed of 4 Mbit/s (8 Mbit/s
provisional), with a message cycle time of 50 µs (asynchronous). The
specified transfer capability is 20 messages (10 data set pairs) per
millisecond, the maximum being 32 messages/ms.
The DriveBus link can employ both plastic and HCS fibre optic cables.
The use of HCS cables enables higher speed and longer distances; the
maximum length of the bus is 15 m for plastic cable, 200 m for HCS
cable. The communication speed and light intensity are set with
jumpers on the NDBU board.
Drive
Drive
AC 80
NDBU
Drive
Branching
Units
Up to 12 Drives
(Up to 8 per
branching unit)
MSTR
MSTRCH0
CH1 CH2 CH3
Drive
Drive
NDBU
Drive
CH1 CH2 CH3
• • • • • •
CH0
CH0
CH0
DRIVEBUS
CH0
CH0
CH0
• • •

ABB Advant Controller 80 Specifications

General

Brand	ABB
Model	Advant Controller 80
Category	Controller
Language	English