Omron CJ Series Operation Manual page 144

4 Installation and Wiring
Round Cable II, Flat Cable I, or Flat Cable II
The communications power to Slave Units is supplied through a Round Cable II, Flat Cable I or Flat
Cable II cable. Therefore there is no need to provide a communications power supply for Slave Units
separately. The communications power supply can be shared by all Slave Units within the same trunk
line or sub-trunk line. The I/O power must be supplied separately to the Slave Units which need I/O
power, i.e., Slave Units with a multi-power supply.
Without Repeater Units
Master Unit
BS+
BS-
BS+
BDH
BDL
BS-
4-36
Communications
power supply
Overcurrent
connector
protection (*1)
(current limit: 4 A)
Trunk line
Branch
lines
Slave Unit
Slave Unit
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Communications
power supply
*1: When complying with UL standards, install a
device to limit the current between the
V
external power supply and the Unit to 4 A or
less for the communications power supply.
Power
supply
G
Round Cable II, Flat Cable I, or Flat Cable
II
Slave Unit
Terminating
Resistor
Slave Units
with network
Slave Unit
power supply