Componet Network Wiring; Round Cable I - Omron CJ Series Operation Manual

3 Wiring Configurations
3-2

CompoNet Network Wiring

A CompoNet Network requires wiring of following lines.
• Two communications signal lines: BDH (communications data high) and BDL (communications data
low)
• Two communications power supply lines (for both communications power and Slave Unit internal cir-
cuit power)
Terminals are BS+ (positive terminal of communications power supply) and BS− (negative terminal of
communications power supply).
The wiring method depends on the cable type.
3-2-1

Round Cable I

• The two communications signal lines are connected in parallel between the Master Unit or a Repeater Unit
and multiple Slave Units.
• A DCN4-TB4 Open Type Connector is used to connect the communications cable between the Mas-
ter Unit or a Repeater Unit and a Slave Unit.
• The two communications power supply lines are connected to each Slave Unit. The supply lines must
be different lines from the communications lines. The communications power supply lines supply 24-
VDC communications power.
• The Master Unit and the connected Repeater Units are not supplied with power.
• A DRS1-T Terminating Resistor must be connected at the end of the network.
Master Unit or
Repeater Unit
BS+
BDH
BDL
BS−
Commu-
nications
Open Type Connector
Open Type Connector
Communications
power supply, 24 VDC
3-4
Relay terminal block
Communications signal lines (2)
Communications
Slave Unit
BS+ BS− BS+
BDH BDL BDH BDL
Communications
power supply, 24 VDC
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Communications
Slave Unit Slave Unit
BS− BS+ BS−
BDH BDL
Communications
power supply, 24 VDC
Terminating
Resistor (121 Ω)