Omron CRT1 - 10-2008, Operation Manual

Page: 104 / 584

81
Power Supply Wiring Section 3-5
Not Using Repeater Unit
Using Repeater Units
Note (1) Do not supply communications power from more than one location for the
trunk line or for any one sub-trunk line. The quality of communications will
decrease and normal communications may not be possible.
BS+ BD
H
BD
L
BS
−
BS
+ BD
H BD
L BS
−
BS+ BD
H
BD
L
BS
−
V
G
BS
−
BS+
BDH
BDL
BS
−
BS+
BS
+ BD
H
BD
L
BS
−
Slave
Units
Trunk line
Branch
line
Power
supply
Communications
power supply
Round cable II or Flat Cable I/II
Master Unit
Communications power
supply connector
Terminating
Resistor
Network power
supply Slave
Units
Slave
Units Slave
Units
Slave
Units
Overcurrent
protection (See note.)
(current limit: 4 A)
Note:
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.
BS+ BD
H
BD
L
BS
−
V
G
BS+ BD
H
BD
L
BS
−
BS+ BD
H
BD
L
BS
−
BS
+
BD
H BD
L BS
−
BS
+ BD
H
BD
L
BS
−
V
G
V
G
BS
+ BD
H BD
L BS
−
V
G
Round cable II or
Flat Cable I/II
BS
−
BS+
BDH
BDL
BS
−
BS+
BDH 1
BDL 1
BS
−
1
BS+ 1
BDH 2
BDL 2
BS
−
2
BS+ 2
PORT1
T POR 2
BS
−
2
BS+ 2
BDH 1
BDL 1
BS
−
1
BS+ 1
BDH 2
BDL 2
BS
−
2
BS+ 2
PORT1
PORT2
BS
−
2
BS+ 2
Termi-
nating
Resis-
tor
Trunk line
Slave
Units
Communications power
supply and I/O power
supply (shared)
Power
supply
I/O power supply
Branch line
Multidrop
Connector
Downstream port communica-
tions power supply connector
Master Unit
Repeater Unit
(downstream)
(upstream)
Communications
power supply
Power
supply
Power
supply
Power
supply
Repeater Unit
Communications power
supply and I/O power
supply (shared)
Termi-
nating
Resis-
tor
Terminat-
ing Re-
sistor
Branch line
Sub-
trunk line
Slave
Units
Slave
Units
Slave
Units
Slave Units
Slave Units
(downstream)
(upstream)
Communications power
supply connector
Network
power
supply
Slave
Units
Multi-power
supply
Slave Unit
Network
power
supply
Slave
Units
Sub-
trunk line
Overcurrent
protection (See note.)
(current limit: 4 A)
Note:
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.
Overcurrent
protection (See note.)
(current limit: 4 A)
Overcurrent
protection (See note.)
(current limit: 4 A)
Round cable II or
Flat Cable I/II
Round cable II or
Flat Cable I/II