ON A communications error has occurred.
(red)
OFF Indicates normal or no communications.
4. Expansion I/O Connecting Cable
Connects the CompoBus/S I/O Link Unit to the expansion connector on the
PC’s CPU Unit, an Expansion I/O Unit, or another Expansion Unit.
Caution Do not touch the expansion I/O connecting cable while the power is being sup-
plied in order to prevent any malfunction due to static electricity.
5. Expansion Connector
Connects to an Expansion I/O Unit or another Expansion Unit (Analog I/O
Unit, Temperature Sensor Unit, or CompoBus/S I/O Link Unit). Up to 3 Ex-
pansion Units or Expansion I/O Units can be connected to a CPU Unit.
2-2-6 DeviceNet I/O Link Unit Components
The following DeviceNet I/O Link Unit is available: CPM1A-DRT21.
1. DeviceNet communications terminals
5. Expansion I/O Unit Connecting Cable
2. Rotary switches
6. Expansion connector
4. LED indicators
3. DIP switches
1, 2, 3... 1. DeviceNet Communications Terminals
Connect these terminals to the DeviceNet transmission path. Use either the
enclosed connector or another connector for wiring.
2. Rotary Switches (SW2 and SW3)
The rotary switches are used to set the DeviceNet node address of the Unit
between 00 and 64. (Do not set values 64 to 99.)
3. DIP Switch (SW1)
The DIP switch sets the baud rate and determines whether or not the out-
puts will be cleared in the event of a communications error.
Unit Components
Section 2-2
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