Omron 3G8F7-CRM21, User Manual

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179
Wiring for a CompoNet Network
Section E-3
E-3-9 Connection Locations for Communications Power Supplies
This section explains the locations to connect the communications power
supplies.
Using Round Cable II,
Flat Cable I or Flat
Cable II
Example: Flat Cables I or II
The BS+ and BS
−
terminals of a 24-VDC communications power supply are
connected to the communications power supply connector provided on the
Master Board. This connection provides all Slave Units on the trunk line,
which are connected to the Master Board via round cables II, Flat Cable I or
Flat Cable II, with the communications power.
Note 1. Only one communications power supply can be provided per trunk line or
sub-trunk line.
2. Power to a sub-trunk line must be supplied through the downstream port
communications power supply connector provided on a Repeater Unit.
3. For a Round Cable II, you can also use the DRS1-T Terminating Resistor.
If you do, insulate the ends of the BS+ and BS
−
lines.
Using Round Cable I
The BS+ and BS
−
terminals of a 24-VDC communications power supply are
connected directly and individually to all Slave Unit and Repeater Unit*. The
power supply is not connected to the Master Board.
Master
Board
Flat Cable I or II
Communications
connector
Slave Unit Slave Unit
Slave Unit
24-VDC communications
power supply
+ −
Supplies
communications
power.
Terminating
Resistor
Master
Board
Communications
Connector
Word Slave Unit
+ −
Connect the communications power supply and each Slave Unit, and
supply communications power directly to each Slave Unit.
Terminating
Resistor
Open Type Connector
(for connecting a Unit)
Word Slave Unit Word Slave Unit
Round cable I
Open Type Connector
(for connecting a Unit)
Open Type Connector
(for connecting a Unit)
Open Type Connector
(for connecting a Unit)
24-VDC
Communications
Power Supply