Omron CRT1 - 10-2008 Operation Manual page 105

Power Supply Wiring
Restrictions
82
(2) Do not supply communications power to the trunk line and a sub-trunk
line or to two sub-trunk lines from the same power supply. Also do not
supply communications power to two or more CompoNet systems from
the same power supply. The quality of communications will decrease and
normal remote I/O communications may not be possible.
(3) The I/O power supply to multi-power supply Slave Units may be a source
of noise depending on the connected devices. Even when supplying the
communications power supply together to all Slave Units, use a separate
I/O power supply so that noise does not affect the network.
The following restrictions apply when supplying communications power
through Round Cable II or Flat Cable I/II.
• The communications power supply can be connected at only one location
for the trunk line and one location each for the sub-trunk lines.
• Communications power to the trunk line can be supplied only through the
communications power supply connector on the Master Unit. Communi-
cations power to a sub-trunk line can be supplied only through the down-
stream port communications power supply connector on the Repeater
Unit. Communications power cannot be supplied at any other location.
Power can be supplied here.
Master Unit/
Repeater
Unit Communications
power supply
3 m max.
Trunk line or
sub-trunk line
Communications
power supply
Power can be
supplied here.
Master Unit/
Repeater
Unit
Trunk line or
sub-trunk line
Round cable II or
Flat Cable I/II
Repeater Unit
Round cable II or
Sub-trunk line
Flat Cable I/II
Power cannot be
supplied here.
Communications
power supply
Round cable II or
Flat Cable I/II
Repeater Unit
Slave Unit
Sub-trunk line
Round cable II or
Flat Cable I/II
Slave Unit
Communications
power supply
Section 3-5
Power cannot be
supplied here.