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CompoBus/S I/O Link Units Section 7-6
(3) LED Indicators
Used to show the CompoBus/S communications status.
(4) Expansion I/O Connecting Cable
Connected to the expansion connector of a CP1H CPU Unit or a CP-
series Expansion Unit or Expansion I/O Unit. The cable is provided with
the CompoBus/S I/O Link Unit and cannot be removed.
Note Do not touch the cables during operation. Static electricity may
cause operating errors.
(5) Expansion Connector
Used to connect CP-series Expansion Units or Expansion I/O Units.
Operating Procedure
Connecting the
CompoBus/S I/O Link Unit
CompoBus/S I/O Link Units are connected to the CP1H CPU Unit. Up to
seven Units can be connected, including any other Expansion Units and
Expansion I/O Units that are also connected. The Units can be connected in
any order from the CPU Unit.
Indicator Name Color Meaning
COMM Communications
indicator
Yellow ON: Communications in progress.
OFF: Communications stopped or error
has occurred.
ERR Error indicator Red ON: A communications error has
occurred.
OFF: Indicates normal communications
or stand-by.
Connect the Unit.
Determine the node
address of the
CompoBus/S I/O Link Unit
and set the DIP switch.
Wire the CompoBus/S
transmission path.
• Connect the CompoBus/S I/O Link Unit.
• The node number should be a unique number between
0 and 15.
• Use the DIP switch to set the CompoBus/S I/O Link
Unit fs node number, communications mode, and the
status of output data when a communications error
occurs.
• Connect the CompoBus/S I/O Link Unit to a
CompoBus/S transmission path.
CPU Unit
CompoBus/S I/O Link Unit
BD L NC( BS-) N C
BD H NC( BS+)
S
COMM
ERR
ON
12 3
4
5
6
No
.
SRT21
EXP
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