Criteria For Selecting Cables - Omron CRT1 - 10-2008 Operation Manual

Communications Cable
2-3-2

Criteria for Selecting Cables

Selecting Cable Types
Item
Application
Slave Word Slave Units
Unit
Bit Slave
con-
Units
IP54 Bit
nec-
Slave
tions
Units
Wiring method for communi-
cations power supply
Master Unit location
Note
Using Different Cable
Types
Note
Restrictions in
Distance between
Cables of Multiple
CompoNet Systems
36
Select the cable type using the following items as conditions.
Round cable I Round cable II
• When using com- • When using com-
mercially available mercially available
cable is desirable. cable is desirable.
• To provide commu- • To supply communi-
nications power cations power to all
separately. Slave Units with the
communications
cable.
Supported
Not supported. (See Not supported. (See
note.) note.)
Wired separately Supplied via Communications Cable. (Power is supplied from the
from the Communi- Master Unit and Repeater Units.)
cations Cable.
End of trunk line Baud rate other than 93.75 kbps: End of trunk line
93.75 kbps: Anywhere in network
Bit Slaves come with a Flat Cable already connected. If this cable is removed,
the Unit cannot be connected.
The same type of cable must be used for all lines downstream from the Mas-
ter Unit (i.e., the trunk line and branch lines, sub-trunk lines and their branch
lines, and branch lines and sub-branch lines must use the same type of
cable).
When Repeater Units are used, however, different cables can be used for the
trunk line and sub-trunk lines, and for sub-trunk lines and sub-trunk lines,
above and below a Repeater Unit.
Master
Unit
Cable (trunk line)
Repeater Unit
Cable (sub-trunk line)
Slave Unit
Round cable I, round cable II, Flat Cable I (Standard) and Flat Cable II
(Sheathed) are treated as different types of cable.
When using more than one CompoNet System with Flat Cable I or II, opera-
tion may be unstable due to interference. To prevent this, the Flat Cables for
the different CompoNet Systems must be separated from each other by at
least 5 mm.
Cable type
Flat Cable I
• To supply communi-
cations power to all
Slave Units with the
communications
cable.
Supported
Not supported.
The same type of cable must be used.
Different types of cable can be used.
The same type of cable must be used.
Slave Unit
Section 2-3
Flat Cable II
• To supply communi-
cations power to all
Slave Units with the
communications
cable.
• Applications in envi-
ronments that
required IP54 com-
pliance (drip-proof,
splash-proof).
Not supported.
Supported