Omron CRT1 - 10-2009, Operation Manual

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85
Power Supply Wiring
Section 3-5
3-5 Power Supply Wiring
The following power supplies are required to operate the CompoNet Network.
The method for supplying communications power and I/O power depends on
the types of cable and Slave Unit that are used. The differences are shown in
the following table.
Multi-power Supply
Slave Units
Using Round Cable I • Communications Power Supply
Supply power to the power supply terminals of the communications con-
nectors of individual Units (or to the PORT1 connector for Repeater Units).
• I/O Power Supply
Supply I/O power to the I/O power supply terminals of individual Units, sep-
arately from the communications power supply. To prevent noise, be sure
to use separate power supplies for I/O and communications.
Using Round Cable II or
Flat Cable I/II • Communications Power Supply
Supply communications power to the Master Unit's communications power
supply connector (or to the downstream port communications power sup-
ply connectors on Repeater Units).
• Communications power supply: Used for communications with individual Units
and for internal circuit operations of Units.
• I/O power supply: Used for I/O operations for Units with external I/O.
Slave Unit classifica-
tion according to
power supply method
Cable type Communications
power supply
I/O power supply
Multi-power supply Round cable I Supplied to Units
individually. Supplied to indi-
vidual Units sepa-
rately from the
communications
power supply.
Round cable II
Flat Cable I/II
Supplied through
the Communications
Cable by supplying
power to the Master
Unit.
Network power supply Round cable I Cannot be used.
Round cable II
Flat Cable I/II
The communications power supply and
the I/O power supply are provided
together through Communications Cable.
BD
H
BD
L
BS
+
BS
−
V G
Communica-
tions power
supply
terminals
I/O power
supply
terminals
24-VDC com-
munications
power supply
24-VDC
I/O power
supply
Round cable I
Master Unit
BS+
BDH
BDL
BS
−
BS+
BS
−
Overcurrent
protection
(current limit: 4 A)
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)