Omron CS1W-CRM21 - Page 114

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Power Supply Wiring Section 4-4
With Repeater Units
Note Depending on the I/O device to which it is connected, an I/O power supply
connected to a multi-power supply Slave Unit may be a source of noise. Even
when the communications power is supplied collectively to all Slave Units, a
separate I/O power supply must be provided so that noise does not affect the
network.
V
G
I/O power supply
Trunk line
Multi-power supply
Slave Unit
Round Cable I
Terminating
Resistor
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.
BDL
BS+
BS-
BS+
BS-
BDH
BDL2
BS+2
BS-2
BDH2
BS+1
BDL2
BS+2
BS-2
BDH2
BS+1
BS+ BS-
BDH BDL
BS+ BS-
BDH
BDL
BDL1
BS-1
BDH1
BDL1
BS-1
BDH1
BS+ BS- BDH BDL BS+ BS- BDH
BDL
Slave Unit
Slave Unit
Slave Unit
V
G
V
G
Power
supply
V
G
V
G
Power
supply
Terminating
Resistor
Terminating
Resistor
V
G
Overcurrent
protection
(current limit: 4 A)
Overcurrent
protection
(current limit: 4 A)
Overcurrent
protection
(current limit: 4 A)
Overcurrent
protection
(current limit: 4 A)
Power
supply
V
G
Power
supply
V
G
Power
supply
V
G
Power
supply
V
G
Round Cable I
Open Type
Connector
Open Type
Connector
Open Type
Connector
Open Type
Connector
Multi-power
supply
Open Type
Connector
Multi-power
supply
Multi-power supply
Open Type
Connector
Round Cable I
I/O power supply
Communications
power supply
Communications
power supply
Communications
power supply
Communications
power supply
Round Cable I
Master Unit
Sub-trunk
Sub-trunk
Round Cable I