Omron CRT1 - 10-2009, Operation Manual

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40
Communications Cable
Section 2-3
2-3-3 Maximum Distance and Number of Connected Units for Types of
Communications Cables
The maximum cable lengths for each segment are shown below, along with
the maximum number of Slave Units that can be connected. Do not exceed
these limits.
Baud Rate of 4 Mbps (No Branching, See note.)
Note Bit Slave Units come with Flat Cable and cannot be connected. Also, there is
no applicable connector for multidrop connections for Flat Cable II, and there-
fore multidrop connection cannot be made.
Baud Rate of 3 Mbps
Item Round cable I/II Flat Cable I
Length per trunk line or sub-trunk line 30 m (90 m) 30 m (90 m)
Branch line length Lines cannot be branched from the
trunk line. (Only multidrop connections
are possible from the trunk line or sub-
trunk lines.)
Total branch line length
Restrictions on branch line locations
Number of Slave Units (including Repeater
Units) 32 32
Master Unit
Repeater
Unit
Trunk line length
Br
anch line length
Br
anch line length
Branch
line length
Branch
line length
Branch
line length
Branch line
length
Branch line length
Sub-tr
unk line length
Sub-tr
unk line length
Sub-tr
unk line length
Sub-tr
unk line length
Sub-tr
unk line length
Sub-tr
unk line length
Sub-branch
line length
Terminating
Resistor
Slave Units
Item Round cable I/II Flat Cable I/II
Length per trunk line or sub-trunk line 30 m (90 m) 30 m (90 m)
Branch line length 0.5 m 0.5 m
Total branch line length 8 m 8 m
Restrictions on branch line locations 3/m 3/m
Number of Units per branch (See note 1.) 1 1
Maximum sub-branch line length Not supported. Not supported.
Total sub-branch line length Not supported. Not supported.
Number of Slave Units (including Repeater
Units) 32 32