Omron CJ Series Operation Manual page 44

1 Introduction
• Sub-branch line: The transmission path created using a T-branch from a branch line. (T-branching
is not possible from sub-branch lines.)
Note Due to differences in functionality, the same type of cable must be used between the trunk
line and a branch line, a sub-trunk line and a branch line, and a branch line and a sub-branch
line. Different types of cable can be used between the trunk line and a sub-trunk line.
Branches
There are two ways to create branch lines.
(1) T-branch Connections
• T-branch connections using Flat Connectors (when Flat Cable I or Flat Cable II is used)
• T-branch connections using commercially available relay terminals (when Round Cable I
or Round Cable II is used)
(2) Multidrop Connections
• Multidrop connections using Flat Connectors and Multidrop Connectors (when Flat
Cable I is used) (See note.)
• Multidrop connections using Open Type Connectors (when Round Cable I or Round
Cable II is used)
Note You cannot use multidrop connections with Multidrop Connectors if you use Flat Cable II.
Communications Power Supply
This is the power supply for communications and internal operations for each Unit.
A commercially available 24-VDC power supply is used for communications and internal operations
in each Unit.
One communications power supply can be connected for a trunk line or a sub-trunk line. Communi-
cations power is supplied to the trunk line from the Master Unit and to a sub-trunk line from the
Repeater Unit.
One power supply cannot be used to supply communications power to more than one line (i.e., to
the trunk line and sub-trunk line or to two sub-trunk lines).
I/O Power Supply
A commercially available 24-VDC power supply is used to power the I/O operations of the external
I/O device connected to a Unit. It is connected to the I/O power supply terminal of the Unit.
1-4 CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)