Omron CP1H-CPU - 05-2006 Operation Manual page 76

Part Names and Functions
!Caution Always turn OFF the power supply to the PLC before mounting or removing
(11) Power Supply, Ground, and Input Terminal Block
Power supply ter-
minals
Ground terminals
Input terminals
(12) Option Board Slots
The following Option Boards can be mounted in either slot 1 or slot 2.
• CP1W-CIF01 RS-232C Option Board
• CP1W-CIF11 RS-422A/485 Option Board
an Option Board.
(13) Input Indicators
The input indicators light when input terminal contacts turn ON.
(14) Expansion I/O Unit Connector
A maximum of seven CPM1A Expansion I/O Units (40 I/O points, 20 I/O
points, 8 input points, 8 or output points) and Expansion Units (Analog I/
O Units, Temperature Sensor Units, CompoBus/S I/O Link Units, or
DeviceNet I/O Link Units) can be connected. (For details on using
Expansion Units and Expansion I/O Units, refer to SECTION 7 Using
CPM1A Expansion Units and Expansion I/O Units.)
(15) Output Indicators
The output indicators light when output terminal contacts turn ON.
(16) External Power Supply and Output Terminal Block
External power
supply terminals
Output terminals
Used to provide a 100- to 240-VAC or 24-VDC power
supply.
Functional ground ( ):
Connect this ground to strengthen noise immunity and to
prevent electric shock.
(AC power supply models only.)
Protective ground ( ):
To prevent electric shock, ground to 100
Used to connect input devices.
XA and X CPU Units with AC power supply specifications
have external 24-VDC, 300-mA max., power supply ter-
minals. They can be used as service power supplies for
input devices.
Used for connecting output devices.
Section 2-1
or less.
45