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There are three models of Expansion Units available: the Analog I/O Unit, Com-
poBus/S I/O Link Unit, and Temperature Sensor Units.
Expansion Connector
Expansion I/O Unit, Analog I/O Unit,
CompoBus/S I/O Link Unit, or Tem-
perature Sensor Unit)
Expansion I/O Connecting Cable
A PC with 100 I/O points (the maximum) can be assembled by connecting three
Expansion I/O Units.
CPM1A-40CDR-A
(24 inputs, 16 outputs)
CPM1A-20EDR1
(12 inputs, 8 outputs)
× 1 Unit + × 3 Units = 60 inputs, 40 outputs
A PC with 6 analog inputs and 3 analog outputs (the maximum) can be as-
sembled by connecting three Analog I/O Units.
A PC with up to 6 temperature inputs for input from thermocouples or platinum
resistance thermometers can be assembled by connecting Temperature Sensor
Units.
CompoBus/S I/O Link Units (Slave Units) can be connected to a CPU Unit. I/O
data (8 inputs and 8 outputs) is transferred between the CPU Unit and the area
allocated to the CompoBus/S Slave. (The I/O data exchanged with the Slave is
internal data; there are no external input or output terminals.)
Note Different types of Expansion Units can be connected at the same time. For ex-
ample, an Expansion I/O Unit, Analog I/O Unit, and CompoBus/S I/O Link Unit,
or an Expansion I/O Unit, Analog I/O Unit, and Temperature Sensor Unit can be
connected to the CPU Unit.
Expansion I/O Units
8-point Input Unit 8-point Output Unit20-point I/O Unit
Unit Max. number
of Units
Inputs Outputs Model
20 I/O points 3 Units max.
24 VDC Relays CPM1A-20EDR1
12 inputs
(See note.)
24 VDC Sinking transistors CPM1A-20EDT
12 inputs
8 outputs
24 VDC Sourcing transistors CPM1A-20EDT1
8 inputs 24 VDC --- CPM1A-8ED
8 outputs
--- Relays CPM1A-8ER
--- Sinking Transistors CPM1A-8ET
--- Sourcing Transistors CPM1A-8ET1
System Configuration
Section 1-2