Omron 3G8F7-CRM21, User Manual

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199
Wiring for Power Supply
Section E-5
E-5-3 Current Consumed by Slave Units and Repeater Units
See the CRT1 Series CompoNet Slave Units and Repeater Units Operation
Manual, doc # W457.
E-5-4 Communications Power Supply Connection Example
Using round cable I
When a round cable I is used, the communications power cannot be supplied
through the communications cable. The power must be supplied to each
Slave Unit and Repeater Unit through separate line. For Slave Units that
require I/O power supply, i.e., multi-power supply Slave Units, the I/O power
must also be supplied separately.
There is no need to provide an external communications power supply for the
Master Board.
Not using a Repeater Unit
BS
+
BS
−
BS
−
BS
+
BDH
BDL
V
G
V
G
V G
BDH BDL BS
+
BS
+
BS
+
BDH BDL
V G
BS
−
BS
−
BS
−
BDH BDL
V G
Communications
power supply
Power
supply
I/O power supply
Trunk line
Multi-power supply
Multi-power supply
Slave Unit Slave Unit
Slave Unit
Round cable I
Terminating
Resistor
Open Type
Connector Open Type
Connector Open Type
Connector
Power
supply
Multi-power supply
Master Board
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.