Omron CRT1 - 10-2008, Operation Manual

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33
Wiring Formations Section 2-2
Number of Units Per
Segment
A maximum of 32 Slave Units and Repeater Units can be connected in one
segment.
2-2 Wiring Formations
There are two possible wiring formations for a CompoNet Network.
Trunk Line-Branch
Line Formation
With this wiring formation, the trunk line is differentiated from branch lines and
there are restrictions on the number of branches and the number of connec-
tions.
Unrestricted Wiring
Formation
With this wiring formation, there is no distinction between the trunk line and
branch lines. There are no wiring restrictions as long as the total cable length
does not exceed 200 m. There is also no limit in the number of branches.
The formation to be used is determined automatically by the type of cable to
used and the required baud rate.
❍
: Trunk line - branch line wiring formation
: Unrestricted wiring formation
Note Lines cannot be branched from the trunk line when the baud rate is
4 Mbps. (Only multidrop connections can be used for branching
from the trunk line or sub-trunk lines.)
Master Unit
Trunk line
Branch line
Slave Unit
Terminating Resistor
Branch line
Branch line
Slave Unit
Slave Unit
Master Unit
Slave Unit
Terminating Resistor
Repeater Unit
Slave Unit
Slave Unit
Slave Unit
Slave Unit
Terminating
Resistor
Cable type Baud rate
4 Mbps 3 Mbps 1.5 Mbps 93.75 kbps
Round cable I
❍
(See note.)
❍ ❍ ❍
Round cable II
Flat Cable I/II
❍
(See note.)
❍ ❍