Omron CRT1 - 10-2008, Operation Manual

Page: 102 / 584

79
Power Supply Wiring Section 3-5
Units with e-CON
Connectors
(CRT1-VOD08S(-1)) Strip the sheath from the end of the power supply cable that comes with the
Unit, and connect the cable to the I/O power supply. Then connect the power
supply cable connector to the output power supply connector on the bottom of
the Unit.
3-5-4 Connecting the Communications and I/O Power Supplies
Round Cable I
When round cable I is used, the communications power cannot be supplied
through the communications cable. The communications power must be sup-
plied to each Slave Unit and Repeater Unit through separate lines. For Slave
Units that require power for I/O (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 Unit.
Not Using a Repeater Unit
V terminals
G terminals
I/O power
supply
(24 VDC)
Output I/O power supply connector
Red
Black
Power supply cable
(provided)
Bottom of Unit
I/O power
supply
(24 VDC)
Output I/O power supply connector
BS
+ BD
H
BD
L
BS
-
V
G
V
G
BS
+ BD
H
BD
L
BS
-
BS+ BD
H
BD
L
BS
-
BDH
BDL
BS-
BS+
BS-
BS+
Termi-
nating
Resistor
Communications
power supply
Power
supply
I/O power supply
Trunk line
Multi-power
supply
Slave Unit
Round cable I
Open Type
Connector
Slave Unit
Power
supply
Open Type
Connector
Multi-power
supply
Slave Unit
Open Type
Connector
Multi-power
supply
Slave Unit Slave Unit Slave Unit
Master Unit
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.