67
Master/Slave Connecting Cables
Section 3-4
M3 Terminals for Slave Units
3-4-2
Master and Slave Terminal Connections
When connecting the communications cable to the terminals of a Master node
or those of a Slave node, connect the BD H signal wire to the BD H terminal
and the BD L signal wire to the BD L terminal.
When supplying power to the Slave’s communications power supply, connect
the BS+ wire to the BS+ terminal and the BS– wire to the BS– terminal. The
following diagram shows the multi-drop connection method.
!Caution
Do not mix up the wires when connecting the communications cable. In partic-
ular, the Slave might be damaged if the power wires are connected to the
wrong terminals.
When power is being supplied through Special Flat Cable but some Slaves
are being supplied from another source, always insulate the BS+ and BS–
wires.
Tighten the terminal screws to the specified tightening torque (0.3 to 0.5 N
⋅
m).
3-4-3
Cable Connector Wiring and Assembly
When using the Slaves shown in the following table, attach the special
OMRON cable connectors to the cables of the sensors and other external
devices.
Recommended terminal (standard JIS part numbers)
RAV1.25-3
RAP1.25-3
6.0 mm max.
6.0 mm max.
Connects to the
Slave's BD L terminal.
Communications cable
High (BD H)
Communications cable
Low (BD L)
Connects to the
Slave's BD H terminal.
Main line cable from the
Master or previous Slave
Main line cable to the
next Slave or terminator
Slave type
Model
Connector Terminals with Transistor Inputs
SRT2-VID08S (-1)
Connector Terminals with Transistor Outputs
SRT2-VOD08S (-1)
Sensor Terminals with Connector Outputs
SRT
@
-OD08S
Sensor Terminals
SRT
@
-ID08S
SRT
@
-ND08S