Omron CJ2 User Manual

5 Installation
5-42
CJ2 CPU Unit Hardware User’s Manual
When installing or wiring devices, make sure that there will be no danger to people and that noise will
not interfere with electrical signals.
Install the PLC as far away as possible from high-voltage (600 V or higher) and power devices to ensure
safe operation and maintenance.
Observe the following points.
• Place a Unit that does not generate much noise next to the CPU Unit, such as an Input Unit or Com-
munications Unit.
• The coils and contacts in electromagnetic contactors and relays in an external circuit are sources of
noise. Locate them at least 100 mm away from the PLC.
5-4-5 Electrical Environment
PLC Installation Location
Arrangement of PLC and Units
Example of Recommended Equipment Arrangement
PLC
Control panel Control panel High-voltage
power panel
Examples of Equipment Arrangement in Panel with High-voltage Devices
Example of Poor Equipment Arrangement
PLC
Control panel Control panel High-voltage
power panel
OK
NG
Power Supply Unit
Communications Unit
CPU
DC Unit
DC Unit
AC Unit
AC Unit
DC I/O
device
AC I/O
device
Terminal block
Example of Arrangement in Panel

Omron CJ2 Specifications

General

Model	CJ2
Manufacturer	Omron
Type	Programmable Logic Controller (PLC)
CPU Units	Multiple models available (e.g., CJ2M, CJ2H)
Number of I/O Points	Up to 2, 560 points
Communication Ports	Ethernet/IP, EtherCAT, USB, Serial
Expansion	Yes, via I/O Units and Special I/O Units
I/O Control Method	Cyclic Scan, Interrupt
Programming Language	Ladder diagram, structured text, function block diagram, sequential function chart, instruction list
Built-in I/O	Available on some models (e.g., CJ2M)
Ethernet Port	Yes, 1 port (depending on CPU Unit)
Serial Ports	RS-232C, RS-422/485 (configurable)
USB Port	Yes (for programming and monitoring)
Operating Temperature	0°C to 55°C
Storage Temperature	-25 to 70°C
Humidity	10 to 95% RH (non-condensing)
Vibration Resistance	10 to 57 Hz, Amplitude: 0.075 mm, 57 to 150 Hz, Acceleration: 1 G, X, Y, and Z directions, 80 min each
Power Supply Voltage	24 VDC or 100 to 240 VAC (depending on CPU Unit)