Omron CRT1 - 10-2009, Operation Manual

Page: 116 / 675

92
Power Supply Wiring
Section 3-5
Using Repeater Units
Note The I/O power supply to multi-power supply Slave Units may be a source of
noise depending on the connected devices. Even when supplying the commu-
nications power supply together to all Slave Units, use a separate I/O power
supply so that noise does not affect the network.
Using Round Cable II
or Flat Cable I/II
When round cable II or Flat Cable I/II is used, the Slave Unit communications
power is supplied through the Flat Cable I/II. There is no special wiring
required to provide the communications power supply to individual Slave
Units. The same communications power supply is shared for the entire trunk
line or sub-trunk line.
For Slave Units requiring an I/O power supply (i.e., multi-power supply Slave
Units), however, I/O power must be supplied separately.
V
G
BS+ BD
H
BD
L
BS
−
BS+ BD
H
BD
L
BS
−
BS+ BDH BDL BS
−
BS+ BDH BDL BS
−
V
G
V
G
V
G
V
G
V
G
BDH 1
BDL 1
BS
−
1
BS+ 1
BDH 2
BDL 2
BS
−
2
BS+ 2
PORT1
PORT2
BDH 1
BDL 1
BS
−
1
BS+ 1
BDH 2
BDL 2
BS
−
2
BS+ 2
PORT1
PORT2
BDH
BDL
BS
−
BS+
BS
−
BS+
Master Unit
Termi-
nating
Resistor
Power
supply
Slave Unit
I/O power supply
Communications
power supply
Multi-power
supply
Slave Unit
Round cable I
Repeater Unit
(upstream)
(downstream)
Communications
power supply
Power
supply
Round cable I
Round cable I
Power
supply
Communications
power supply
Slave Unit
Power
supply
Power
supply
Communications
power supply
Open Type
Connector
Repeater Unit
(upstream)
(downstream)
Open Type
Connector
Multi-power
supply
Slave Unit
Open Type
Connector
I/O power supply
Power
supply
Terminat-
ing Resis-
tor
Round cable I
Slave Unit
Multi-power
supply
Slave Unit
Open Type
Connector
Multi-power
supply
Slave Unit
Open Type
Connector
Termi-
nating
Resistor
Trunk line
Sub-trunk
line
Sub-trunk
line
Slave Unit
Round cable I
Open Type
Connector
Overcurrent
protection
(See note.)
(current limit: 4 A)
Note:
When using the UL standards, please install a
unit to restrict current between the external
power supply and this unit to 4 A. (Only
communications power supply)
Overcurrent
protection
(See note.)
(current limit: 4 A)
Overcurrent
protection
(See note.)
(current limit: 4 A)
Overcurrent
protection
(See note.)
(current limit: 4 A)