Power Supply Wiring - Omron CJ Series Operation Manual

4 Installation and Wiring
4-4

Power Supply Wiring

The following power supplies are required to operate the CompoNet Network.
• Communications power supply: Used for communications with individual Units and for internal circuit
• I/O power supply:
The method for supplying communications power and I/O power depends on the types of cable and
Slave Unit that are used. The differences are shown in the following table.
Power supply
Multi-power supply
Network power supply
Multi-power Supply
Round Cable I
• Communications Power
Power is supplied individually to the power terminals on the communications connectors of each
Unit. Power is also supplied individually to the power terminals on the PORT1 connectors of each
Repeater Unit.
• I/O Power
Power is supplied separately from the communications power to the I/O power supply terminals on
each Unit. To prevent noise generation, the power must be supplied separately from the communi-
cations power supply.
Master Unit
BS+
BDH
BDL
BS-
BS+
BS-
4-30
operations of Units.
Used for I/O operations for Units with external I/O.
Cable type
Round Cable I
Round Cable II, Flat Cable I,
or Flat Cable II
Round Cable I
Round Cable II, Flat Cable I,
or Flat Cable II
Communications
I/O power
power supply terminals
supply terminals
BD BD BS BS V
H L + -
Round Cable I
Overcurrent protection
(current limit: 4 A)
When complying with UL standards,
install a device to limit the current
between the external power supply
and the Unit to 4 A or less for the
communications power supply.
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Communications power
supply method
Supplied to Units individu-
ally.
Supplied through the
Communications Cable by
supplying power to the
Master Unit.
Not supported
The communications power supply and the I/O power
supply are provided together through Communications
Cable.
I/O power
G
supply
24 VDC
Communica-
tions power
supply
24 VDC
I/O power supply
method
Supplied to individual
Units separately from the
communications power
supply.