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Power Supply Wiring Section 4-4
Restrictions The following restrictions apply when supplying communications power
through a Round Cable II, Flat Cable I, or Flat Cable II cable.
• 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 of communications power supply connector on the Repeater
Unit. Communications power cannot be supplied at any other locations.
• Use separate power supplies each for the Master Unit trunk line and for
the upstream and downstream trunk lines from a Repeater Unit.
Round Cable II, Flat Cable I, or Flat Cable II
Master Unit/
Repeater Unit
Repeater Unit
Trunk line or
sub-trunk line
Communications
power supply
Master Unit/
Repeater Unit
Repeater Unit
Sub-trunk
line
Trunk line or
sub-trunk line
Communications
power supply
Round Cable II, Flat Cable I, or Flat Cable II
Power Cannot Be Supplied
3 m max.
Power Can Be Supplied
Power Can
Be Supplied
Slave
Round Cable II, Flat Cable I, or Flat Cable II
Slave
Communications
power supply
Communications
power supply
Round Cable II, Flat Cable I, or Flat Cable II
Power Cannot Be Supplied
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